RT Journal Article T1 Anorectal Melanoma as an Unexpected Diagnosis for a Pigmented Mass Resembling a Thrombosed Hemorrhoid. A1 Pintor Tortolero, José A1 Durán Martinez, Manuel A1 Calleja Lozano, Rafael YR 2019 FD 2019-11-29 LK http://hdl.handle.net/10668/14774 UL http://hdl.handle.net/10668/14774 LA en DS RISalud RD Apr 9, 2025