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Abstract：
Rosai-Dorfman disease (RDD) is an uncommon histiocytic disorder that occurs in nodal and/or extranodal sites. Extranodal RDD exhibits a wide range of clinical and radiological presentations, frequently leading to misdiagnoses. Involvement of the gastrointestinal (GI) system is uncommon, accounting for less than 1% of the reported cases. Here we present a case of a 54-year-old male who complained of abdominal distention and was diagnosed with RDD affecting the sigmoid colon, manifesting as a sigmoid mass. The patient had a past medical history of liver transplantation due to hepatocellular carcinoma (HC). This report details the multiphase contrast-enhanced computed tomography (CT) and fluorodeoxyglucose (18F-FDG) positron emission tomography (PET-CT) imaging findings of RDD involving the sigmoid colon without lymphadenopathy, and a review of the relevant literature is provided.
摘要：
Rosai-Dorfman病（RDD）是一种罕见的组织细胞疾病，发生在结节和/或结外部位。结外RDD表现出广泛的临床和放射学表现，经常导致误诊。胃肠道（GI）系统的参与并不常见，占报告病例的不到1%。在这里，我们介绍了一个54岁的男性，他抱怨腹胀并被诊断为影响乙状结肠的RDD，表现为乙状肿块。该患者具有由于肝细胞癌（HC）而进行过肝移植的病史。本报告详细介绍了RDD的多相对比增强计算机断层扫描（CT）和氟脱氧葡萄糖（18F-FDG）正电子发射断层扫描（PET-CT）成像发现，涉及乙状结肠，无淋巴结肿大，并对相关文献进行了综述。
