Keratoacanthoma vs. Squamous-Cell Carcinoma

Multinodular keratoacanthoma and T cell lymphoma

“…The boundary between these two lesions is sometimes so narrow, so indistinct, that some pathologists recommend combining histological and clinical data to make a diagnosis [13]. The boundary between these two lesions is sometimes so narrow, so indistinct, that some pathologists recommend combining histological and clinical data to make a diagnosis [13].…”

“…Histology confirms that these nodules have a KA structure associated with infiltrative lesions which may cause SCC. The boundary between these two lesions is sometimes so narrow, so indistinct, that some pathologists recommend combining histological and clinical data to make a diagnosis [13]. Nevertheless, Seifert et al [14] demonstrated that it is possible to make a diagnosis of KA on the basis of very specific histological and clinical criteria.…”