CYLD and carcinoma: Interestingly, a detailed case report of spiradenocylindroma-like basaloid carcinoma of the anus showed highly similar histologic features to our cases and those of references [6, 7], as well as HPV positivity, but examination of the CYLD gene detected no mutation in the tumor [24]; we similarly identified cylindroma-like carcinomas infrequently among CYLD-wildtype ACs.