A case of adult gastrointestinal duplication with high serum CA19-9

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  • 血清 CA19-9 が高値であった成人小腸原発消化管重複症の一例

Abstract

<p>A 62-yearold man presented with pain in his lower right abdomen. Computed tomography（CT） revealed a cystic lesion in the ileocecal region. A preoperative blood examination indicated anelevated level of serum CA19-9 （351.5 U/mL）. The possibility of a malignant tumor in the ileocecalregion prompted laparoscopic surgery, which confirmed the presence of a cyst attached to the appendixand a 10 cm ileal duplication located 200 cm from the Treitz ligament. Subsequently, a partial resectionof the ileum was performed. Pathological examination of the specimen revealed that the ileal duplication consisted of ileal tissue, exhibiting a fullthickness structure resembling the intestinal tract. Moreover, a connection was established between the cyst and the ileal duplication, confirming their continuity.The patient was diagnosed with a tubular and cystic gastrointestinal duplication without any malignantcharacteristics. Tubular and cystic gastrointestinal duplications are rare conditions, often accompaniedby elevated preoperative tumor markers. The absence of malignancy in such cases is even rarer,prompting this case report alongside a comprehensive review of the existing literature</p>

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