Greenhill Mark, Gnecco Iv James, Ahmed Imtiaz
Arizona College of Osteopathic Medicine, Midwestern University, 19555 N 59th Ave., Glendale, AZ 85308, USA.
Department of Diagnostic Radiology, Mountain Vista Medical Center, 1301 S. Crismon Road, Mesa, AZ 85209, USA.
Radiol Case Rep. 2018 Aug 13;14(4):518-520. doi: 10.1016/j.radcr.2018.07.020. eCollection 2019 Apr.
Paracaval lipoma refers to a fatty tissue collection surrounding the intrahepatic portion of the inferior vena cava (IVC). It is a relatively infrequent benign finding on abdominal CT imaging, speculated to be a result of negative thoracic pressure on the IVC during inspiration. If not recognized, paracaval lipoma can be confused for thrombus or, worse yet, malignant invasion of the IVC, resulting in a costly and unnecessary workup. Here we describe a 51-year-old white male presenting to our institution with a 2-week history of abdominal pain, increasing abdominal girth, jaundice, and ascites; subsequent CT of the abdomen and pelvis without contrast revealed an incidental finding of fat deposition around the caudate lobe with a juxtacaval distribution, consistent with paracaval lipoma.
腔静脉旁脂肪瘤是指围绕肝内段下腔静脉（IVC）的脂肪组织聚集。它是腹部CT成像中相对少见的良性表现，推测是由于吸气时胸腔对下腔静脉产生负压所致。如果未被识别，腔静脉旁脂肪瘤可能会被误诊为血栓，或者更糟糕的是，被误诊为下腔静脉的恶性侵犯，从而导致昂贵且不必要的检查。在此，我们描述一名51岁白人男性，因腹痛、腹围增大、黄疸和腹水2周病史前来我院就诊；随后进行的腹部和盆腔CT平扫显示，尾状叶周围偶然发现脂肪沉积，呈腔静脉旁分布，符合腔静脉旁脂肪瘤表现。
