Surgical Pathology Criteria

Micropapillary Urothelial (Transitional Cell) Carcinoma

Differential Diagnosis

Micropapillary Variant, Urothelial Carcinoma Invasive Urothelial Carcinoma with Prominent Retraction Artifact
Predominantly small nests Larger, confluent nests
Multiple nests per space Usually one nest per space
Spaces generally do not conform to shape of nests Spaces generally follow conture of nests

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