This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: ENT
[{'content': 'Contraindication of supraglottic laryngectomy is/are-a) Poor pulmonary reserveb) Tumor involving pyriform sinusc) Tumor involving preepiglottic spaced) Vocal cord fixatione) Postcricoid area extension \nSelect and explain. \nA. abcd, B. bcde, C. abde, D. ade', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Supraglottic laryngectomy: Removal of the supraglottis or upper part of larynx.\nIt should be done if following conditions are fulfilled.\n\nFor tumors with a T stage of T1 , T2 or T3 by pre epiglottic space involvement only (Thus involvement of pre-epiglottic space is not a contraindication for supraglottic larynygectomy).\nVocal cords are mobile\nCartilage is not involved (which includes cricoid cartilage so option e is correct)\nAnterior commissure is not involved\nPatient has good pulmonary reserve (i.e. Poor pulmonary reserve is a contraindication)\nBase of the tongue is not involved past the circumvallate papillae\nThe apex of the pyriform sinus is not involved. (i.e. involvement of pyriform sinus is a contraindication)\nThe FEV1 is predicted to be > 50)\n\nSo if above criteria are not filled it is a contraindication of supraglottic laryngectomy. Answer is further supported by following lines of : Bellinger\n“Supraglottic laryngectomy should not be attempted if there is vocal cord fixation, extensive involvement of pyriform sinus, thyroids or cricoid cartilage invasion or extensive involvement of base of tongue (to or beyond circumvallate papilla)” –Ballenger otolaryngology and Head and Neck Surgery 16th/ed pg-1285', 'role': 'assistant'}]