Also muscle relaxant drug test cheap cilostazol 100 mg line, the influence that the autonomic system has on the heart is not the same as for other systems muscle relaxant for joint pain buy 100 mg cilostazol with mastercard. Other organs have smooth muscle or glandular tissue that is activated or inhibited by the autonomic system muscle relaxant yellow pill v buy discount cilostazol 100 mg line. The contradictory signals do not just cancel each other out muscle relaxant over the counter cilostazol 100mg with amex, they alter the regularity of the heart rate and can cause arrhythmias. The sympathetic system is affected by drugs that mimic the actions of adrenergic molecules (norepinephrine and epinephrine) and are called sympathomimetic drugs. Drugs such as phenylephrine bind to the adrenergic receptors and stimulate target organs just as sympathetic activity would. Other drugs are sympatholytic because they block adrenergic activity and cancel the sympathetic influence on the target organ. Drugs that act on the parasympathetic system also work by either enhancing the postganglionic signal or blocking it. Anticholinergic drugs block muscarinic receptors, suppressing parasympathetic interaction with the organ. What two changes does adrenaline bring about to help the skeletal muscle response What constitutes the afferent and efferent branches of the competing reflex (dilation) As discussed in this video, movies that are shot in 3-D can cause motion sickness, which elicits the autonomic symptoms of 3. The disconnection between the strokespell) to learn about a teenager who experiences a perceived motion on the screen and the lack of any change series of spells that suggest a stroke. In the end, sitting close to the screen or right in the middle of the theater one expert, one question, and a simple blood pressure cuff makes motion sickness during a 3-D movie worse Why would the heart have to beat faster when the teenager changes his body position from lying down to sitting, and then to standing Which signaling molecule is most likely responsible for an increase in digestive activity What central fiber tract connects forebrain and brain is not part of both the somatic and autonomic systems Which type of drug would be an antidote to atropine flight responses in effectors A target effector, such as the heart, receives input from on these autonomic functions The cardiovascular center is responsible for regulating parasympathetic divisions at the level of those connections the heart and blood vessels through homeostatic mechanisms. Damage to internal organs will present as pain cardiovascular center invoke to keep these two systems in associated with a particular surface area of the body. Why might topical, cosmetic application of atropine autonomic system in considering disease states. Why would or scopolamine from the belladonna plant not cause fatal autonomic tone be important in considering cardiovascular poisoning, as would occur with ingestion of the plant One part of the exam is the inspection of the oral cavity and pharynx, which enables the doctor to not only inspect the tissues for signs of infection, but also provides a means to test the functions of the cranial nerves associated with the oral cavity. The problem is finding where in the entire nervous system the stroke has occurred. By checking reflexes, sensory responses, and motor control, a health care provider can focus on what abilities the patient may have lost as a result of the stroke and can use this information to determine where the injury occurred. In the emergency department of the hospital, this kind of rapid assessment of neurological function is key to treating trauma to the nervous system. In the classroom, the neurological exam is a valuable tool for learning the anatomy and physiology of the nervous system because it allows you to relate the functions of the system to particular locations in the nervous system. As a student of anatomy and physiology, you may be planning to go into an allied health field, perhaps nursing or physical therapy. You could be in the emergency department treating a patient such as the one just described. This can be especially challenging because you need to learn about the nervous system using your own nervous system. The first chapter in this unit about the nervous system began with a quote: "If the human brain were simple enough for us to understand, we would be too simple to understand it. A healthcare provider can pinpoint problems with the nervous system in minutes by running through the series of tasks to test neurological function that are described in this chapter. You can use the same approach, though not as quickly, to learn about neurological function and its relationship to the structures of the nervous system. Nervous tissue is different from other tissues in that it is not classified into separate tissue types. It does contain two types of cells, neurons and glia, but it is all just nervous tissue. White matter and gray matter are not types of nervous tissue, but indications of different specializations within the nervous tissue. Furthermore, specific functions are not wholly localized to individual brain structures in the way that other bodily functions occur strictly within specific organs. In a broad sense, the nervous system is responsible for the majority of electrochemical signaling in the body, but the use of those signals is different in various regions. The nervous system is made up of the brain and spinal cord as the central organs, and the ganglia and nerves as organs in the periphery. The brain and spinal cord can be thought of as a collection of smaller organs, most of which would be the nuclei (such as the oculomotor nuclei), but white matter structures play an important role (such as the corpus callosum). Studying the nervous system requires an understanding of the varied physiology of the nervous system. The neurological exam provides a way to elicit behavior that represents those varied functions. It can be performed in a short time-sometimes as quickly as 5 minutes-to establish neurological function. In the emergency department, this rapid assessment can make the difference with respect to proper treatment and the extent of recovery that is possible. The first of these is the mental status exam, which assesses the higher cognitive functions such as memory, orientation, and language. Then there is the cranial nerve exam, which tests the function of the 12 cranial nerves and, therefore, the central and peripheral structures associated with them. The cranial nerve exam tests the sensory and motor functions of each of the nerves, as applicable. Two major sections, the sensory exam and the motor exam, test the sensory and motor functions associated with spinal nerves. Finally, the coordination exam tests the ability to perform complex and coordinated movements. The gait exam, which is often considered a sixth major exam, specifically assesses the motor function of walking and can be considered part of the coordination exam because walking is a coordinated movement. Neuroanatomy and the Neurological Exam Localization of function is the concept that circumscribed locations are responsible for specific functions. For example, the cognitive functions that are assessed in the mental status exam are based on functions in the cerebrum, mostly in the cerebral cortex. Deficits in neurological function uncovered by these examinations usually point to damage to the left cerebral cortex. In the majority of individuals, language function is localized to the left hemisphere between the superior temporal lobe and the posterior frontal lobe, including the intervening connections through the inferior parietal lobe. The cranial nerve exam is for the nerves that connect to the diencephalon and brain stem (as well as the olfactory connections to the forebrain). The coordination exam and the related gait exam primarily assess the functions of the cerebellum. The motor and sensory exams are associated with the spinal cord and its connections through the spinal nerves. Part of the power of the neurological exam is this link between structure and function. Testing the various functions represented in the exam allows an accurate estimation of where the nervous system may be damaged.
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Lewy bodies-Eosinophilic spasms while sleeping 50 mg cilostazol otc, intracytoplasmic inclusions found in the neurons of the substantia nigra in Parkinson disease muscle relaxants quizlet order 100mg cilostazol visa. Lhermitte sign-Electric-like shocks extending down the spine caused by flexing the head; due to damage of the posterior columns spasms right abdomen buy generic cilostazol 100mg. Mees lines-Transverse lines on fingernails and toenails; due to arsenic poisoning muscle relaxant orphenadrine purchase 100mg cilostazol free shipping. Millard-Gubler syndrome-Alternating abducent and facial hemiparesis; an ipsilateral sixth and seventh nerve palsy and a contralateral hemiparesis. Negri bodies-Intracytoplasmic inclusions observed in rabies; commonly found in the hippocampus and cerebellum. Nissl bodies/substance-Rough endoplasmic reticulum found in the nerve cell body and dendrites but not in the axon. Ondine curse-Inability of patient to breathe while sleeping; results from damage to the respiratory centers of the medulla. Parinaud syndrome-Lesion of the midbrain tegmentum resulting from pressure of a germinima, a tumor of the pineal region; the patient has a paralysis of upward gaze. Pick disease-Dementia affecting primarily the frontal lobes; always spares the posterior third of the superior temporal gyrus; clinically indistinguishable from Alzheimer disease. Rathke pouch-Ectodermal outpocketing of the stomodeum; gives rise to the adenohypophysis (anterior lobe of the pituitary gland). Romberg sign-Loss of balance when the subject stands with feet together and closes the eyes; a sign of dorsal column ataxia. Stiff-man syndrome-Myopathy characterized by progressive and permanent stiffness of the muscles of the back, neck, and spreading to involve the proximal muscles of the extremities; caused by a disturbance of the inhibitory action of Renshaw cells in the spinal cord. Sturge-Weber syndrome-Neurocutaneous congenital disorder including a port-wine stain (venous angioma) and calcified leptomeningeal angiomatoses (railroad track images seen on plain film); seizures occur in up to 90% of patients. Wallenberg syndrome-Condition characterized by hoarseness, cerebellar ataxia, anesthesia of the ipsilateral face and contralateral body, and cranial nerve signs of dysarthria, dysphagia, dysphonia, vertigo, and nystagmus; results from infarction of the lateral medulla due to occlusion of the vertebral artery or its major branch, the posterior inferior cerebellar artery; Horner syndrome is frequently found on the ipsilateral side. Wallerian degeneration-Anterograde degeneration of an axon and its myelin sheath after axonal transection. Weber syndrome-Lesion of the midbrain basis pedunculi involving the root fibers of the oculomotor nerve and the corticobulbar and the cortospinal tracts. Werdnig-Hoffman syndrome (spinal muscular atrophy)-Early childhood disease of the anterior horn cells (lower motor neuron disease). Wernicke aphasia-Difficulty in comprehending spoken language; also called receptive, posterior, sensory, or fluent aphasia. Index Note: Page numbers followed by f indicate illustrations; those followed by t indicate tables; and those followed by Q indicate end-of-chapter Question and Answer sections. American Academy of Audiology Clinical Practice Guidelines Diagnosis, Treatment and Management of Children and Adults with Central Auditory Processing Disorder August 2010 The guidelines emphasize the following points and contain the following recommendations. In addition, developmental, communicative, and learning-related problems, as well as peripheral hearing loss and aging processes, can impact central auditory processing. These individuals often have difficulties with language, learning, and reading in addition to their auditory deficits. In questioning the patient or informant, it is essential that the clinician consider a range of issues, including hearing, medical, educational, social, developmental, and communicative status. A comprehensive history often reveals potential comorbid conditions that may affect test performance and the interpretation of the test results. Patient factors and considerations include: age, cognitive ability, general behavior, speech, language and hearing status, motivation, and attention issues. An in-depth, relevant history and careful test selection process will maximize the power of the diagnostic test battery. Accurate diagnosis is dependent on the administration and interpretation of sensitive, efficient, and well-normed behavioral and electrophysiologic measures of central auditory function. Given the complexity and redundancy of the central auditory system, accurate diagnosis typically requires the administration of more than one test; however, while sensitivity may be improved by increasing the number of tests in the battery, the administration of too many central auditory tests may compromise specificity. No matter how efficient a test may prove to be, it is of no clinical utility if appropriate norms are not available. In particular, additional course work in the basic sciences will provide clinicians with the knowledge needed to critically apply diagnostic tools and treatment strategies. Among the most pressing professional issues is the lack of intensive treatment provided in schools. The support and advocacy of these professional associations may lead to smaller caseloads and more therapy time per child in schools, as well as positive changes in reimbursement rates. These guidelines are not exhaustive and are not intended to serve as the sole source of guidance for the clinician, nor are they intended to replace clinical judgment. Rather these guidelines reflect the best evidence-based practices in this area at this time as judged by the members of this task force. Although not the primary focus of this task force report, comments regarding research needs can be found at the end of each major section of these guidelines.
Avoidance of or efforts to avoid distressing memories muscle relaxant drug class purchase cilostazol 50 mg on line, thoughts muscle relaxant allergy purchase 50mg cilostazol mastercard, or feelings about or closely associated with the traumatic event(s) muscle relaxant 500 mg 50mg cilostazol otc. Avoidance of or efforts to avoid external reminders (people bladder spasms 5 year old cilostazol 100mg discount, places, conversations, activities, objects, situations) that arouse distressing memories, thoughts, or feel ings about or closely associated with the traumatic event(s). Negative alterations in cognitions and mood associated with the traumatic event(s), beginning or worsening after the traumatic event(s) occurred, as evidenced by two (or more) of the following: 1. Inability to remember an important aspect of the traumatic event(s) (typically due to dis sociative amnesia and not to other factors such as head injury, alcohol, or drugs). Persistent and exaggerated negative beliefs or expectations about oneself, others, or the world. Persistent, distorted cognitions about the cause or consequences of the traumatic event(s) that lead the individual to blame himself/herself or others. Marked alterations in arousal and reactivity associated with the traumatic event(s), be ginning or worsening after the traumatic event(s) occurred, as evidenced by two (or more) of the following: 1. Irritable behavior and angry outbursts (with little or no provocation) typically ex pressed as verbal or physical aggression toward people or objects. Dereaiization: Persistent or recurrent experiences of unreality of surroundings. Note: To use this subtype, the dissociative symptoms must not be attributable to the physiological effects of a substance. Specify if: With delayed expression: If the full diagnostic criteria are not met until at least 6 months after the event (although the onset and expression of some symptoms may be immediate). In children 6 years and younger, exposure to actual or threatened death, serious injury, or sexual violence in one (or more) of the following ways: 1. Witnessing, in person, the event(s) as it occurred to others, especially primary care givers. Note: Witnessing does not include events that are witnessed only in electronic me dia, television, movies, or pictures. Presence of one (or more) of the following intrusion symptoms associated with the traumatic event(s), beginning after the traumatic event(s) occurred: 1. Note: Spontaneous and intrusive memories may not necessarily appear distress ing and may be expressed as play reenactment. Recurrent distressing dreams in which the content and/or affect of the dream are related to the traumatic event(s). Note: It may not be possible to ascertain that the frightening content is related to the traumatic event. One (or more) of the following symptoms, representing either persistent avoidance of stimuli associated with the traumatic event(s) or negative alterations in cognitions and mood associated with the traumatic event(s), must be present, beginning after the event(s) or worsening after the event(s): Persistent Avoidance of Stimuli 1. Avoidance of or efforts to avoid activities, places, or physical reminders that arouse recollections of the traumatic event(s). Avoidance of or efforts to avoid people, conversations, or interpersonal situations that arouse recollections of the traumatic event(s). Markedly diminished interest or participation in significant activities, including con striction of play. Alterations in arousal and reactivity associated with the traumatic event(s), beginning or worsening after the traumatic event(s) occurred, as evidenced by two (or more) of the following: 1. Irritable behavior and angry outbursts (with little or no provocation) typically ex pressed as verbal or physical aggression toward people or objects (including ex treme temper tantrums). The disturbance causes clinically significant distress or impairment in relationships with parents, siblings, peers, or other caregivers or with school behavior. Derealization: Persistent or recurrent experiences of unreality of surroundings. Specify if: With delayed exp ression: If the full diagnostic criteria are not met until at least 6 months after the event (although the onset and expression of some symptoms may be immediate). In some individuals, fear-based reexperiencing, emotional, and behavioral symptoms may predominate. In others, anhedonic or dysphoric mood states and negative cognitions may be most distressing. In some other individuals, arousal and reactive-externalizing symptoms are prominent, while in others, dissociative symptoms predominate. The directly experienced traumatic events in Criterion A include, but are not limited to , exposure to war as a combatant or civilian, threatened or actual physical assault. For children, sexually violent events may include developmentally inappropriate sexual experiences without physical violence or injury. A life-threatening illness or debilitating medical condition is not neces sarily considered a traumatic event. Medical incidents that qualify as traumatic events in volve sudden, catastrophic events. Indirect exposure through learning about an event is limited to experiences affecting close relatives or friends and experiences that are violent or acciden tal. Such events include violent per sonal assault, suicide, serious accident, and serious injury. The disorder may be especially severe or long-lasting when the stressor is interpersonal and intentional. Commonly, the individual has recurrent, involuntary, and intrusive recollections of the event (Criterion Bl). The emphasis is on recurrent memories of the event that usually include sensory, emotional, or physiological behavioral components. A common reexperiencing symptom is distressing dreams that replay the event itself or that are representative or thematically related to the major threats involved in the traumatic event (Criterion B2). The individual may experience dissociative states that last from a few seconds to several hours or even days, during which components of the event are relived and the individual behaves as if the event were occurring at that mo ment (Criterion B3). Such events occur on a continuum from brief visual or other sensory intrusions about part of the traumatic event without loss of reality orientation, to complete loss of awareness of present surroundings. These episodes, often referred to as "flash backs," are typically brief but can be associated with prolonged distress and heightened arousal. For young children, reenactment of events related to trauma may appear in play or in dissociative states. Intense psychological distress (Criterion B4) or physiological re activity (Criterion B5) often occurs when the individual is exposed to triggering events that resemble or symbolize an aspect of the traumatic event. The individual commonly makes deliberate efforts to avoid thoughts, memories, feelings, or talking about the traumatic event. Negative alterations in cognitions or mood associated with the event begin or worsen after exposure to the event. These negative alterations can take various forms, including an inability to remember an important aspect of the traumatic event; such amnesia is typically due to dissociative amnesia and is not due to head injury, alcohol, or drugs (Criterion Dl). The individual may experience markedly diminished interest or participation in previously enjoyed activities (Criterion D5), feeling detached or es tranged from other people (Criterion D6), or a persistent inability to feel positive emotions (especially happiness, joy, satisfaction, or emotions associated with intimacy, tenderness, and sexuality) (Criterion D7). They may also engage in reckless or self destructive behavior such as dangerous driving, excessive alcohol or drug use, or selfinjurious or suicidal behavior (Criterion E2). Problems with sleep onset and maintenance are common and may be associated with nightmares and safety concerns or with generalized elevated arousal that interferes with adequate sleep (Criterion E6). Some individuals also experience persistent dissociative symptoms of de tachment from their bodies (depersonalization) or the world around them (derealization); this is reflected in the 'with dissociative symptoms" specifier. Associated Features Supporting Diagnosis Developmental regression, such as loss of language in young children, may occur. Lower estimates are seen in Europe and most Asian, African, and Latin American countries, clustering around 0. Highest rates (ranging from one-third to more than onehalf of those exposed) are found among survivors of rape, military combat and captivity, and ethnically or politically motivated internment and genocide. Latinos, African Americans, and American Indians, and lower rates have been reported among Asian Americans, after ad justment for traumatic exposure and demographic variables. Symptoms usually begin within the first 3 months after the trauma, although there may be a delay of months, or even years, before criteria for the diagnosis are met. Duration of the symptoms also varies, with complete recovery within 3 months occurring in approximately one-half of adults, while some individuals remain symptomatic for longer than 12 months and sometimes for more than 50 years. Symptom recurrence and intensification may occur in response to reminders of the original trauma, ongoing life stressors, or newly experienced traumatic events. Young children may report new onset of frightening dreams without content specific to the traumatic event. Before age 6 years (see criteria for preschool subtype), young children are more likely to ex press reexperiencing symptoms through play that refers directly or symbolically to the trauma. They may not manifest fearful reactions at the time of the exposure or during reex periencing.
Diseases
Precocious puberty
Bilateral renal agenesis
Waldmann disease
Lipoid congenital adrenal hyperplasia
Ascariasis
Congenital gastrointestinal disorder
Osebold Remondini syndrome
Lopes Marques de Faria syndrome
Looking at parent forums however muscle relaxant without drowsiness order cilostazol 50 mg mastercard, it is interesting to see how many were not counselled regarding the significant lifelong impact of vocal cord palsy in addition to the immediate aspiration risk spasms face generic cilostazol 50mg without prescription. In this technique a branch of the ansa cervicalis is anastomosed with the recurrent laryngeal nerve spasms jerking limbs cheap cilostazol 100mg free shipping. This reinnervates the muscles of the hemi-larynx and can restore muscular tone and improve arytenoid position back spasms 7 weeks pregnant generic 100 mg cilostazol with visa. There is no restoration of movement coordinate with respiration and phonation, hence "non-selective". One advantage of this technique is that the laryngeal framework is not disrupted in any way and so the larynx will continue to grow without interruption or the need for revision of the procedure. The reinnervation may not be effective for up to 6 months, while axonal ingrowth occurs, and so injection augmentation with a temporary substance should be performed simultaneously. Feeding techniques may avoid aspiration and in older children voice exercises can improve compensation from the contralateral vocal cord17. Tracheostomy is reported in less than 20% and these cases are mainly children with comorbities and sleep apnoea1. At the time of surgery, it was not possible to find any remaining branches of the ansa cervicalis on the ipsilateral side. For patients in whom the palsy is iatrogenic, the surgeon may well have an impression as to the state of the nerves and the likelihood of spontaneous recovery. If recovery is going to occur in iatrogenic cases, signs of co-ordinate movement would be expected by 3 months post injury. In idiopathic cases the time frame is much less predictable and recovery has been reported to occur many years later1,2. It could be seen that the vocal cords were being passively drawn in by the Bernoulli effect on inspiration. We used concentric needles held in place with crocodile forceps but hook-wire electrodes can be used and left in place as the child wakes. Therefore, the decision was made to keep the child intubated rather than to proceed with tracheostomy as full recovery was likely. Despite the difficulties in managing a tracheostomy, in our opinion this option is often preferable to procedures that are destructive to the laryngeal structures such as cordotomy, arytenoidectomy and vocal cord lateralisation. These procedures result in permanent degradation of voice which may be avoided if recovery occurs or if Selective Laryngeal Reinnervation, as described by Professor Jean-Paul Marie, is successful18. The aim of this technique is to restore physiological vocal cord movement that is coordinated with respiration and phonation. The adductor muscles are reinnervated from a small branch of the hypoglossal nerve that supplies the thyrohyoid muscle on either side. Professor Marie has performed this technique in children of all ages, with excellent success rates. Technological developments have improved the diagnostic rate and new techniques, such as reinnervation, have the potential to improve outcomes. Pediatric Vocal Fold Immobility:Natural History and the Need for Long-Term Follow-up. In: Lucian Sulica, Andrew Blitzer editors, Vocal Fold Paralysis: Springer 2006; pp 225-235 4. Should all newborns who undergo patent ductus arteriosus ligation be examined for vocal fold mobility Incidence of vocal fold paralysis in infants undergoing ligation of patent ductus arteriosus. Outcome of laryngeal paralysis in neonates: a long term retrospective study of 113 cases. Hyaluronic acid is probably the most suitable injectable currently available as it requires low injection pressures and distributes evenly within the cord. It is more rapidly reabsorbed than other substances with a duration of effectiveness of only about 3 months. However, spontaneous recovery is a possibility, so this duration of action is not inappropriate. Comparison between clinical and videofluoroscopic evaluation of swallowing in children with suspected dysphagia. Use of hooked-wire electrodes for electromyography of the intrinsic laryngeal muscles. Role of ultrasound in the assessment of vocal cord function in infants and children. The possibility to remove the tumour transorally, in a concept of minimally invasive surgery, has reduced postoperative morbidity, with a more rapid recovery for patients and avoiding a tracheostomy in most of them. Thus in many centres, where external approaches or radiation therapy were established as a first line treatment, the treatment protocols have been reconsidered. Unfortunately, no randomized studies have been conducted in this area, and the decision process is in part dependent to the learning curve and to the availability of treatment alternatives. Bilateral involvement of the posterior commissure, cricoid cartilage infiltration, extensive subglottic involvement and marked extralaryngeal tumour extension are considered as contraindications5-8. A useful approach requires a suitable anatomy, an experienced surgeon, adequate instruments (different size and types of laryngoscopes, forceps, etc) and the knowledge of tricks about how to improve the tumour view. According to the authors, it also seems to be related to the risk of close or positive margins10. During surgery, initial debulking with the laser in scan mode may be necessary to progressively improve exposure in large tumours. External pressure is extremely helpful in the anterior commissure and the ventricle. The pressure has to be exerted on the cricoid cartilage, to verticalize the larynx and to facilitate the perpendicular cut with the laser. Under these conditions, and after repositioning the laryngoscope many times, most advanced tumours can be resected. Exposure according to location and extension of the tumours is expressed in Table 1. Usually, tumour resection in a single piece is not possible in advanced tumours, requiring the tumour to be divided into multiple blocks. It is difficult then to obtain representative and assessable surgical margins throughout the entire resection. Moreover, when the number of samples sent for pathological study is very high, its final interpretation is complicated and may lead to confusion. One is to seek a resection plane which is set away from the tumour boundary in those areas where a wider resection will not lead to a functional impairment. In laryngeal tumours, especially in advanced supraglottic or lateral glottic cases, this plane is often (identified with) the thyroid perichondrium. The blunt detachment of this inner perichondrium and inspection of an undamaged thyroid wing facilitates the obtainment of a deep, tumour-free margin. Thus, for those advanced glottic tumours, a subperichondric dissection is recommended. For advanced supraglottic tumours, the advice is to completely remove the thyroepiglottic fat of the affected area. The presence of focal infiltration of the thyroid cartilage represents an additional difficulty for the surgeon. Focal cartilage infiltration is often an intraoperative finding, accompanied by the impossibility of conducting intraoperative cartilage biopsies for confirmation. Removal of a cartilage window or extensive ablation of the affected cartilage is recommended. For more extended infiltrations, the likelihood that tumour cells circulate Table 1: Exposure according to tumour location and tumour size. Good All tumours (T1-T4a) Supraglottic Glottic Anterior commissure (vertical plane) T3-T4a Supraglottic Glottic Anterior commissure (vertical plane) 109/131 (83. Thus, limited resection of the area of focal involvement may be insufficient and the possibility of an open partial approach should be considered. Even in the best scenario, there are many postoperative situations in which the margin may be considered "uncertain". These are given when the specimen sent for the pathology analysis presents a wide area of carbonization, when the laser reaches the cartilage and the certainty of infiltration remains unclear, or when the surgeon has enlarged the resection by means of additional vaporization. The attitude to be adopted in this clinical situation varies according to each author. This is especially true in very extended supraglottic tumours, in tumours where the vertical plane of the anterior commissure is involved and when the thyroid cartilage is widely infiltrated. By contrast, those lesions involving the vertical plane of the anterior commissure or the anterior paraglottic space, are among the most difficult to treat.
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