Primary Anorectal Melanoma on FDG PET/CT

ABSTRACTPrimary anorectal melanoma is an extremely rare, aggressive malignancy with a poor prognosis. A 76-year-old man with a 2-month history of rectal bleeding, anal pain, and tenesmus was referred for an F-FDG PET/CT examination, which revealed an abnormal focal FDG uptake on the lower rectum wit...

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Bibliographic Details
Published in:Clinical nuclear medicine 2014-08, Vol.39 (8), p.762-764
Main Authors: Li, Zu-Gui, Qin, Xiao-Jing
Format: Article
Language:English
Subjects:
Aged
Carcinoma - diagnostic imaging
Carcinoma - pathology
Fluorodeoxyglucose F18
Humans
Male
Melanoma - diagnostic imaging
Melanoma - pathology
Multimodal Imaging
Positron-Emission Tomography
Radiopharmaceuticals
Rectal Neoplasms - diagnostic imaging
Rectal Neoplasms - pathology
Tomography, X-Ray Computed
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Summary:ABSTRACTPrimary anorectal melanoma is an extremely rare, aggressive malignancy with a poor prognosis. A 76-year-old man with a 2-month history of rectal bleeding, anal pain, and tenesmus was referred for an F-FDG PET/CT examination, which revealed an abnormal focal FDG uptake on the lower rectum with multiple other intense FDG-avid regions in locoregional pelvic lymph nodes, bones, liver, and lung. It was highly suggestive of malignancy, and a provisional diagnosis of advanced rectal carcinoma was made. However, a following tissue biopsy of the lesion on the lower rectum performed by colonoscopy histopathologically indicated primary anorectal melanoma.
ISSN:0363-9762
1536-0229
DOI:10.1097/RLU.0000000000000456