一名 45 岁女性患者，之前身体健康，数周后右上腹胀满就诊。患者没有出现疼痛、恶心、呕吐或黄疸，也没有既往病史或手术史，包括无恶性肿瘤史。经检查，生命体征在正常范围内，患者看上去状况良好，右上腹可触及柔软的饱满感。腹部无压痛、无膨胀。实验室检查未发现异常，全血细胞计数正常，血清肿瘤标志物正常，包括甲胎蛋白（<2.0 ng/mL；参考值，<8.3 ng/mL）、癌抗原 19-9（21.6 U/mL；参考值，<8.3 ng/mL）。参考，<35 U/mL）和癌胚抗原（1.3 ng/mL；参考，<5 ng/mL）。在急诊科使用静脉注射造影剂对腹部和骨盆进行 CT 检查。随后，在使用或不使用静脉造影剂的情况下对腹部进行联合 MRI 和 MR 胰胆管造影，以进行进一步评估。在同一次遭遇中进行的胸部 CT 没有发现异常。

A 45-year-old female patient who was previously healthy presented after several weeks of fullness in the right upper quadrant of the abdomen. The patient did not experience pain, nausea, vomiting, or jaundice, and had no contributory past medical or surgical history, including no history of malignancy. Upon examination, vital signs were within normal limits and the patient appeared well, with soft palpable fullness in the right upper quadrant. The abdomen was nontender and nondistended. Laboratory investigation revealed no abnormalities, with a normal complete blood cell count and normal serum tumor markers that included α-fetoprotein (<2.0 ng/mL; reference, <8.3 ng/mL), cancer antigen 19-9 (21.6 U/mL; reference, <35 U/mL), and carcinoembryonic antigen (1.3 ng/mL; reference, <5 ng/mL). CT of the abdomen and pelvis was performed with intravenous contrast material in the emergency department. Subsequently, combined MRI and MR cholangiopancreatography of the abdomen was performed with and without intravenous contrast material for further evaluation. CT of the chest performed during the same encounter was unremarkable.