Pintor Tortolero, JoséDurán Martinez, ManuelCalleja Lozano, Rafael2023-02-082023-02-082019-11-29http://hdl.handle.net/10668/14774enAnal CanalAnus NeoplasmsHemorrhoidsHumansMelanomaRectumAnorectal Melanoma as an Unexpected Diagnosis for a Pigmented Mass Resembling a Thrombosed Hemorrhoid.research article31786326open access10.1016/j.cgh.2019.11.0391542-7714http://www.cghjournal.org/article/S1542356519313795/pdf