%0 Journal Article
%A Pintor-Tortolero, Jose
%A Duran-Martinez, Manuel
%A Calleja-Lozano, Rafael
%T Anorectal Melanoma as an Unexpected Diagnosis for a Pigmented Mass Resembling a Thrombosed Hemorrhoid.
%D 2019
%U http://hdl.handle.net/10668/14774
%X A 71-year-old woman presented with a sensation of an anal mass, episodes of rectal bleeding, and a 2-kg weight loss over the past year. She had a prior diagnosis of hemorrhoids, which had been managed with warm sitz baths and antihemorrhoidal cream. On rectal examination, a pedunculated, hard mass was identified. Colonoscopy revealed an irregular, ulcerated, blackish, hard, and friable mass located at the confluence of the lower rectum and anal canal. Histological analysis confirmed a malignant intraepithelial proliferation of melanocytes, consistent with anorectal melanoma. Magnetic resonance imaging (MRI) showed a mass at the anorectal junction occupying 50% of the luminal circumference, without evidence of obstruction. The patient underwent a laparoscopic abdominoperineal resection, with a favorable postoperative recovery and discharge on the fifth day.
%K Rectum
%K Hemorrhoids
%K Gastrointestinal Hemorrhage
%K Proctectomy
%K Anus Diseases
%K Colonoscopy
%K Magnetic Resonance Imaging
%~