TY - JOUR T1 - Anal melanoma: Atypical cause of rectal bleeding in an older adult patient JO - Revista de Gastroenterología de México T2 - AU - Castillo-López,G. AU - Villanueva-Sánchez,M.C. SN - 2255534X M3 - 10.1016/j.rgmxen.2021.08.012 DO - 10.1016/j.rgmxen.2021.08.012 UR - http://www.revistagastroenterologiamexico.org/en-anal-melanoma-atypical-cause-rectal-articulo-S2255534X21000931 ER -