PMC6083430_01
CT showing 3 enhanced, round-shaped masses mimicking gastric cancer lymph nodes or peritoneal dissemination recurrence that increased in size but not in number. Small characters indicate the CT a year after gastrectomy, and large characters indicate the CT two years after gastrectomy. a: 0.5 cm, b: 2.5 cm, c: 1.0 cm in diameter. A: 1.5 cm, B: 4 cm, C: 1.5 cm in diameter.
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Then, the 2-year postoperative CT indicated slowly growing masses (1.5 cm, 4 cm and 1.5 cm in diameter, as shown in Fig. 1).
Positron emission tomography revealing FDG uptake of two masses, although one mass did not take up FDG. a: A small mass with mild uptake of FDG, b: a large mass with uptake of FDG; the maximum standard uptake value of 4.1, c: a small mass without uptake of FDG.
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Positron emission tomography (PET) revealed fluorodeoxyglucose (FDG) uptake of two masses, and the maximum standard uptake value (SUVmax) of the largest mass was 4.1 (Fig. 2).
Intraoperative pictures showing 3 masses of the jejunal mesentery close to the jejunum. a: 3-cm mass mimicking peritoneal dissemination, 20 cm from the jejunojejunostomy, b: a 4-cm round mass with a pellicle, 80 cm from the jejunojejunostomy, and a 1.5-cm mass mimicking peritoneal dissemination, 120 cm from the jejunojejunostomy.
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There were three mesenteric masses near the bowel: a 1.5-cm diameter mass, 20 cm distal from the jejunojejunostomy; a 4-cm diameter mass, 80 cm distant from the jejunojejunostomy, and a 1.5-cm diameter mass, 120 cm distant from the jejunojejunostomy (Fig. 3).
a: Gross appearance of the largest mesenteric desmoid tumor that was resected with negative surgical margins. b: Histological examination revealing spindle-shaped cells and collagen fibers (hematoxylin and eosin stain). c: Immunostaining showing diffuse beta-catenin positive.
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Histological examination showed desmoid tumors that were 15 x 12 mm, 40 x 40 mm and 15 x 13 mm (Fig. 4).