GATA6 and skin basal cell carcinoma: In addition, the majority of the tumors harboring elements of SG differentiation were positive for Gata6: sebaceous nevus, syringocystadenoma papilliferum (SCAP, commonly associated with sebaceous nevus), folliculosebaceous cystic hamartoma (FSCH), steatocystoma multiplex (genetic condition characterized by multiple benign sebaceous cysts), and basal cell carcinoma (BCC) with a cystic differentiation.