Heterotopia and Developmental Pathology

The correct answer is B.


Explanation:

Heterotopic rests are small areas of normal tissue in abnormal sites. These are usually clinically insignificant unless they form a noticeable mass or are misdiagnosed in a biopsy (raising suspicion of metastatic cancer). One exception is a gastric heterotopia, which typically occurs in the small intestine, and can produce enough acid to cause a peptic ulcer in adjacent mucosa. The ulcer may be a source of gastrointestinal bleeding.

Heterotopias of the CNS (choice A), parathyroid (choice D), and thyroid(choice E) can occur, but would not be expected in the small intestine and would not be likely to cause bleeding if present.

Pancreatic heterotopia (choice C) can occur in the small intestine, but does not cause bleeding.

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