This example of colonic Kaposi sarcoma has both spindle cell and lymphangioma-like areas. It even had perfect hyaline globules (indicated).

Gastropathy associated with losartan with parietal cell loss mimics autoimmune gastritis but there is no enterochromaffin-like cell hyperplasia. There is only mild antral inflammation. This case has a collagenous gastritis pattern of injury. Note the pseudopyloric metaplasia.

It's a good day to see some amyloid. Love the apple green birefringence.

Maybe this patient has Zollinger-Ellison syndrome. A duodenal gastrin-producing NET may have resulted in hypergastrinemia that produced a NET of ECL cell type at the GE junction (extending from the gastric oxyntic mucosa! Pertinent testing was suggested.

A fooler described by J Misdraji and a cast of Pathology stars! Misdraji J, Lauwers GY, Irving JA, Batts KP, Young RH. Appendiceal or cecal endometriosis with intestinal metaplasia: a potential mimic of appendiceal mucinous neoplasms. Am J Surg Pathol. 2014 May;38(5):698-705.

These samples are from a patient known to have Behcet disease. It is a vasculitis that can affect both small and large blood vessels, usually veins.

An example of crystal storing histiocytosis; the patient needs to be evaluated for a plasma cell disorder or other lambda-restricted B cell neoplasm. Arnold CA, et al. Am J Surg Pathol. 2018 Oct;42(10):1317-1324. PMID: 29878935.

This lesion arose in the small intestine, resulting in obstruction. It probably was related to non-steroidal anti-inflammatory drugs. Cortina G, et al. PMID: 10555011.

This gastric body biopsy shows severe destructive gastropathy - the parietal cells are gone! It is too inflamed for autoimmune gastritis/pernicious anemia. Apoptotic bodies, usually scarce in the stomach, are indicated. This was a result of pembrolizumab immunotherapy.

This atypical lipomatous tumor (well-differentiated liposarcoma) is unusual in containing plentiful lipoblasts.