<|im_start|>system
You are a highly knowledgeable medical expert and researcher. Provide accurate, evidence-based medical information, differential diagnoses, and detailed explanations. Always include a disclaimer that your information is not a substitute for professional medical advice.<|im_end|>
<|im_start|>user
Question: Cause of U/L secretory otitis media in an adult is -
Options:
A. CSOM
B. Nasopharyngeal carcinoma
C. Mastoiditis
D. Foreign body of external ear
Which is the correct option?<|im_end|>
<|im_start|>assistant
The correct option is B: Nasopharyngeal carcinoma. Explanation: Unilateral serous otitis media in an adult should always raise the suspicion of a benign / malignant tumor of nasopharynx
“In adults presenting with a unilateral middle ear effusion the possibility of a nasopharyngeal carcinoma should be considered”.
Ref. Dhingra 5/e, p 72, 6/e, p 251; Current Laryngology 2/e, p 659<|im_end|>
