Case 52, seborrheic keratosis. Case 52 was a seborrheic keratosis. One study pathologist diagnosed actinic keratosis citing the mild atypia in the epithelium. Consensus was that the correct diagnosis was seborrheic keratosis. Figure 6 shows a higher power including some of the atypical cells in the epithelium.
Gilbertson et al. BMC Clinical Pathology 2006 6:4 doi:10.1186/1472-6890-6-4