A 9-year-old gir1 is brought to the physician because of poor growth during the past year. She is below the 3rd percenti

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A 9-year-old girl is brought to the physician because of poor growth during the past year. She is below the 3rd percentile for height and at the 1Oth percentile for weight. Physical examination shows no other abnormalities. Visual field testing shows bitemporal hemianopia. Laboratory studies show growth hormone deficiency. An MRI of the brain shows a calcified cystic mass in the suprasellar region. This tumor is most likely derived from which of the following?


A. Diverticulum of the roof of the embryonic oral cavity
B. Ependymal layer of the median eminence
C. Hypophyseal cartilage
D. Neural crest cells of the rhombencephalon
E. Neuroectoderm of the diencephalon