RT Journal Article
T1 Anorectal Melanoma as an Unexpected Diagnosis for a Pigmented Mass Resembling a Thrombosed Hemorrhoid.
A1 Pintor-Tortolero, Jose
A1 Duran-Martinez, Manuel
A1 Calleja-Lozano, Rafael
K1 Rectum
K1 Hemorrhoids
K1 Gastrointestinal Hemorrhage
K1 Proctectomy
K1 Anus Diseases
K1 Colonoscopy
K1 Magnetic Resonance Imaging
AB 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.
PB Elsevier
YR 2019
FD 2019-11-28
LK http://hdl.handle.net/10668/14774
UL http://hdl.handle.net/10668/14774
LA en
NO Pintor Tortolero J, Durán Martinez M, Calleja Lozano R. Anorectal Melanoma as an Unexpected Diagnosis for a Pigmented Mass Resembling a Thrombosed Hemorrhoid. Clin Gastroenterol Hepatol. 2021 Feb;19(2):e12-e13
DS RISalud
RD Jul 6, 2025