Primary Cutaneous Mucinous Carcinoma: Presence of Myoepithelial Cells as a Clue to the Cutaneous Origin

Abstract

We conclude that an in situ component is frequently present in PCMC (5/7) and may help in distinguishing this entity from MMC, especially of breast origin. Furthermore, it may provide insight into the pathogenetic mechanism of mucinous carcinoma evolving from in situ carcinoma with luminal mucinous distention to cellular tumor with a little surrounding mucin.