McGill University Health Centre » Carcinoid

May 18 2020 by McGill University Health Centre

These are usually secondary tumor foci, arising most frequently from a primary tumor in the gastrointestinal tract or lung. Melanoma should be considered as part of the differential diagnosis, because neither carcinoid nor melanoma tumors have a necrotic component. This enucleation specimen shows a welldifferentiated neuroendocrine tumor in the choroid. The overlying pigment is caused by proliferation of the retinal pigment epithelium (arrowhead). Focal microhemorrhages are visible on the surface of the retina (arrows).

Condition/keywords: carcinoid, enucleation, focal microhemorrhages