A case of inflammatory pseudo-tumor with multiple diverticula

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  • 虫垂憩室炎による多房性嚢胞を形成した炎症性腫瘤の1例
  • ショウレイ チュウスイ ケイシツエン ニ ヨル タボウセイノウホウ オ ケイセイ シタ エンショウセイ シュリュウ ノ 1レイ

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Abstract

A 72-year-old woman was admitted to our hospital because of right lower abdominal pain. A painful mass (diameter, 6 cm) was palpable at the ileocecal region. Laboratory test results suggested inflammation, and serum CEA and CA19-9 levels were both normal. Computed tomography of the abdomen after administration of a contrast agent showed a heterogeneously stained mass and suggested the presence of multiple cystic lesions within the mass. Colonofiberscopy did not show findings suggestive of malignancy. Because of difficulty in preoperative diagnosis of appendiceal tumors, we conducted laparoscopy-assisted right hemicolectomy and D2 lymph-node dissection under a possible diagnosis of inflammatory tumor with multiple diverticulosis or cystic tumor of the appendix. The resected specimen showed an inflammatory pseudo-tumor containing multiple diverticula with thick inflammatory fibrous tissue. Here, we have presented a rare case of multiple appendiceal diverticulosis forming a mass lesion that mimicked an appendiceal tumor.

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