Two Cases of Schloffer Tumor, Initially Suspected to be Recurrence Demonstrating PET False Positive, after Surgery for Colon Cancer

Ohta, Hiroyuki; Mochizuki, Kazuki; Tsukayama, Shoichi; Kawaura, Yukimitsu; Sonoda, Hiromichi; Shimizu, Tomoharu; Tani, Tohru

doi:10.3862/jcoloproctology.67.336

Cited by 6 publications

(1 citation statement)

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“…Although the frequency of port site recurrence is reportedly very low [2], a growing mass at the port site of laparoscopic surgery must be suspected with the recurrence of primary gastroenterological cancer. Previous studies [3–5] demonstrated that Schloffer tumor showed F-18 fluorodeoxyglucose (FDG) positron emission tomography (PET) positivity after the surgery for colorectal cancer. Therefore, distinguishing metastatic from Schloffer tumor is difficult when a growing mass at the port site of laparoscopic surgery is observed.…”

Section: Introductionmentioning

confidence: 99%

A case of Schloffer tumor with rapid growth and FDG-PET positivity at the port site of laparoscopic sigmoidectomy for colon cancer

et al. 2019

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Background Schloffer tumor is a foreign body granuloma in the abdominal subcutaneous layer that develops due to a foreign body such as suture from several months to years postoperatively. Herein, we report a case of a rapidly growing Schloffer tumor with F-18 fluorodeoxyglucose (FDG) positron emission tomography (PET) positivity at the port site of laparoscopic sigmoidectomy for colon cancer. Case presentation An 85-year-old man, who underwent laparoscopic sigmoidectomy for stage IIIa sigmoid colon cancer 10 months ago, was referred to our hospital with complaints of a growing mass in the abdominal wall. The tumor was palpable at the right-sided abdominal wall corresponding to the port site of laparoscopic sigmoidectomy. The tumor rapidly grew for 2 months. Computed tomography showed a ring-enhanced mass at the right-sided abdominal wall. PET examination revealed high accumulation of FDG in the tumor. Tumor resection was performed due to suspected port site recurrence. The pathological diagnosis was inflammatory granuloma, so-called Schloffer tumor. Conclusion In the era of laparoscopic surgery, Schloffer tumor may be one of the differential diagnoses for rapidly growing tumor with FDG-PET positivity at the port site in postoperative patients with advanced colorectal cancer.

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Section: Introductionmentioning

confidence: 99%