TRPS1 and extramammary Paget disease: Our research fills this gap by demonstrating that strong and diffuse TRPS1 expression is not exclusive to certain cutaneous epithelial neoplasms, such as SCCs [2,3], mammary and extramammary Paget diseases [2,4], and EMPSGCs [5], but is also observed in a subset of non-epithelial and non-melanocytic cutaneous neoplasms.