Pilary Complex Carcinoma: An Adnexal Carcinoma of the Skin with Differentiation towards the Components of the Pilary Complex

Abstract

We report twelve cases with a distinctive form of adnexal carcinoma occurring most commonly over the head and neck of relatively old individuals. The growth was single in all cases, deep dermal in location, and consisted of massive proliferation of small basaloid cells with only occasional connection with the surface epidermis. The basaloid tumor masses showed only a few areas of palisading of their outer cell nuclei and occasional retraction space formation. The neoplasm revealed scattered areas of trichilemmal and epidermoid keratinization, foci of sebaceous, and areas of sweat ductal differentiation indicating participation of various components of the pilary complex.

Trichoblastic Carcinoma: A Report of Two Cases of a Deeply Infiltrative Trichoblastic Neoplasm

“…However, a literature search discloses no example reported or illustrated as trichoblastic carcinoma as a distinct entity. We also emphasize that the neoplasms described here are distinct from those previously labeled or implied to be trichoblastic carcinoma 5–7 …”

“…We also emphasize that the neoplasms described here are distinct from those previously labeled or implied to be trichoblastic carcinoma. [5][6][7] Case Reports Patient 1 Slides of a skin biopsy specimen from a 53-year-old woman were transferred to our institution for consultation prior to surgery. The patient had a neoplasm of several years' duration, which was located in the upper lip.…”