Pharynx · NEET PG Preparation ENT
A 10-year-old child presents with recurrent throat infections, nasal speech, and mouth breathing. On examination, a large, pale, midline mass is seen…
Practice question from Pharynx (NEET PG Preparation ENT), with the correct answer and a step-by-step solution.
easy · MCQ · Q-A27181
A 10-year-old child presents with recurrent throat infections, nasal speech, and mouth breathing. On examination, a large, pale, midline mass is seen hanging from the posterior and superior wall of the nasopharynx, obstructing the choanae. This structure arises from which of the following embryonic lining tissues?
- A.Endoderm of the foregutCorrect answer
- B.Ectoderm of the stomodeum
- C.Mesoderm of the branchial arches
- D.Neuroectoderm of the neural crest
Solution
The mass described is the adenoid (pharyngeal tonsil). The nasopharynx and oropharynx develop from the cranial portion of the foregut, whose lining is primarily of endodermal origin, while the oral cavity proper is lined by ectoderm from the stomodeum.
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