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': 'Chalky white tympanic membrane is seen in- \nSelect and explain. \nA. ASOM, B. Otosclerosis, C. Tympanosclerosis, D. Cholesteotoma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Keratosis Obturans (Primary canal cholesteatoma)\n\nIt is accumulation of a large plug of desquamated keratin in the external auditory meatus\nSeen between 5 and 20 yrs of age (i.e. younger age as compared to cholesteatoma which is seen in middle age)\nMay be U/L or Bilateral (occasionally)\nIt may be associated with bronchiectasis and chronic sinusitis.\n\nClinical Features\n\nPain in the ear (severe olalgia)\nHearing loss (of conductive type)\nTinnitus\nEar discharge – sometimes\n\nO/E\n\nPearly white mass of keratin is visible in the ear canal\nTympanic membrane is thickened and chalky white in appearance\nEar canal is ballooned\n\nTreatment\n\nRemoval by syringing / Instrumentation\nPeriodic checkup should be done to see reaccumulation\nIf it recurs – keratolytic agent – 2% salicylic acid in alcohol can be tried.\n\nNOTE:\nThe answer to this question should have been ‘desquamated epithelium’ only but since it is not given in options – we are choosing the next best option.', 'role': 'assistant'}]