Cowden syndrome: report of two cases and review of clinical presentation and management of a rare colorectal polyposis - Campos, Fábio Guilherme; Habr Gama, Angelita; Kiss, Desidério Roberto; Atuí, Fábio César; Rawet, Viviane; Goldstein, Paulo J.; Gama-Rodrigues, Joaquim Jose (Current Surgery, 2006)