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': 'Treatment of middle ear malignancy includes -\na) Excision of petrous part of temporal bone\nb) Subcortical excision\nc) Modified radical mastoidectomy\nd) None \nSelect and explain. \nA. abc, B. bc, C. ac, D. bcd', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Most common malignant tumor of middle ear and mastoid is squamous cell carcinoma.\nClinical Features\n\nIt affects age group 40–60 years\nSlightly more common in females\nMost important predisposing cause is long standing CSOM\nPatient may present with chronic foul smelling blood stained discharge\nPain is severe and comes at night.\nFacial palsy may be seen\nO/E – Friable, hemorrhagic granulation or polyp are present.\nDiagnosis – made only on biopsy\n\nCT and angiography are done to see the extent of disease.\nMetastasis occurs to cervical lymph nodes later.\nTreatment of carcinoma of middle ear is combination of surgery followed by radiotherapy.\nSurgery consists of radical mastoidectomy / subtotal or total petrosectomy depending on the extent of tumor.', 'role': 'assistant'}]