PMC5613449_01
(a) CT scan showing an obstructing abdominal mass originating from the small bowel and causing intussusception; (b) intraoperative image of the intussusception; (c) thyroid gland with increased SUV in the 18FDG-PET/CT; (d) intestinal intussusceptions due to what appeared to be a distant melanoma metastasis.
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fig1
Imaging exams revealed an obstructing abdominal mass originating from the small bowel and causing intussusception (Figure 1). During the operation indeed an intestinal intussusception was found (Figure 1) due to what appeared to be a distant melanoma metastasis (Figure 1). One month after the operation the patient was subjected to 18FDG-PET/CT in order to rule out any other distant metastases. 18FDG-PET/CT result was normal except the thyroid gland that showed increased uptake (Figure 1).
(a) Invasion of the mucosa of the small intestine by the melanoma cells (H+EX200). (b) Invasion of the muscularis propria by the melanoma cells (H+EX100). (c) Tumor cells are positive for HMB45 (immunostain x200).
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fig2
Immunohistochemistry revealed positivity of the tumor cells for HMB45 and Melan A (Figure 2).