Resumen

CASTILLO, Ofelia, FRISANCHO, Oscar y PALOMINO, Americo. Melanoma amelanótico en ciego. Rev. gastroenterol. Perú, set./dic. 2010, vol.30, no.4, p.368-371. ISSN 1022-5129.

A 73 year old male patient who presented to emergency with severe anemia (Hb 4.9 g / dL), referring to a month with dark stools, fatigue and significant weight loss. The high endoscopic evaluation found no potentially bleeding lesions. Subsequently, we confirmed the presence of red blood in stools, like enterorrhagia and underwent a colonoscopy, in which two elevated lesions were found in the cecum: a pedunculated (with active bleeding, oozing) and other sessile; both were removed. the pathology showed that corresponded to amelanotic melanoma in cecal region. Physical examination revealed no malignant skin lesions. Recurrent gastrointestinal bleeding forced to make another colonoscopy that showed new bleeding lesion of the cecum. He was operated with a cecostomy and cecal excision of the lesion.. The tomography scan showed metastases in mediastinum and surgical implants were found in liver metastases and small intestine. The patient continued treatment in medical oncology. We report this case, because gastrointestinal bleeding is an unusual clinical presentation of malignant melanoma.

Palabras llave: amelanotic melanoma; lower gastrointestinal bleeding; gastrointestinal malignancy.