Adenosquamous carcinoma Phillip H McKee, Antonina Kalmykova, CSD Health Care

Adenosquamous carcinoma is a rare tumor characterized by squamous and glandular differentiation. Often the former is superficially located whereas the latter is present in the deep aspect of the tumor. Perineural invasion is an almost invariable feature accounting for it's frequent recurrence rate. It should not be confused with acantholytic squamous carcinoma. Mucin can often be demonstrated with DPAS etc.