keratoacanthoma
Histologic Features
- An exo-endophytic lesion with
- A crateriform architecture and overhanging buttresses
- An epithelial proliferation consisting of uniform cells with abundant pale-staining cytoplasm (glassy)
- Many horn pearls resulting from premature cornification
- Intraepithelial micro-abscesses
- Aggregates of atypical keratinocytes at the periphery of the lobules
- A lichenoid mixed-cell infiltrate at the base in association with fibrosis
Updated Wednesday, July 31, 2013 8:30:48 PM