A 48-year-old woman from southern China presents with unilateral serous otitis media and a nasopharyngeal mass on imaging. Biopsy confirms undifferentiated squamous cell carcinoma. Which finding best distinguishes this keratinizing variant of NPC from the non-keratinizing variant?

See the options, answer & explanation

Sign in free to reveal the answer choices, the correct answer, the detailed explanation, and AI-powered insights for this question.