A medical student on a rotation in the pathology laboratory is given an unlabeled microscope slide with tissue provided by a gastroenterologist from a cancer patient she is attending. The mucosa and submucosa are poorly preserved, with only the thick muscularis well-stained, showing striated fibers. The slide most likely shows a biopsy of which region of the GI tract?

Question

Quizplus · Accepted Answer

The esophagus is the only part of the GI tract that contains striated muscle fibers in its muscularis layer, particularly in the upper third.

A Medical Student on a Rotation in the Pathology Laboratory