Schwann cell hamartoma associated with hyperplastic colon polyp: An exceptional finding G. Castillo-López; S. González-Vázquez; T. Iscar-Galán; L. Alarcón-García; J.M. Riesco-López;

Anal melanoma: Atypical cause of rectal bleeding in an older adult patient G. Castillo-López; M.C. Villanueva-Sánchez;