1 MCQs in Anatomy for NEET PG
A 3-month-old boy presents with progressive increase in head circumference crossing percentiles, bulging anterior fontanelle, and episodes of vomiting. On axial CT brain at the midbrain level, the structure marked **D** is narrowed. Imaging shows enlarged lateral and third ventricles with a normal-sized fourth ventricle. Which of the following is the most likely diagnosis and the primary reason for the imaging pattern observed?
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