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The sections show normal colonic-type mucosa and abnormal mucosal glands that have, from crypt base to luminal aspect, nuclear pseudostratification/crowding, nuclear hyperchromasia and enlargement, goblet cell paucity, and cytoplasmic hyperchromasia. | The sections show normal colonic-type mucosa and abnormal mucosal glands that have, from crypt base to luminal aspect, nuclear pseudostratification/crowding, nuclear hyperchromasia and enlargement, goblet cell paucity, and cytoplasmic hyperchromasia. | ||
The abnormal nuclei | The abnormal nuclei maintain basal stratification. There is no definite cribriforming of glands, and no sheeting of the atypical epithelium. No lamina propria invasion is identified. Completeness of excision is best assessed endoscopically. | ||
===Final diagnosis=== | ===Final diagnosis=== | ||
Polyp, transverse colon, excision - tubular adenoma, negative for high-grade dysplasia. | Polyp, transverse colon, excision - tubular adenoma, negative for high-grade dysplasia. |
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