Abstract
The retroperitoneum is a posterior space of the peritoneum, which has many visceral and vascular structures. Spontaneous retroperitoneal hemorrhages have variable causes, the most common of which are diseases of retroperitoneal organs. However, retroperitoneal hemorrhages may be caused by bare area injury. In this case study, a bare area was observed in the right upper quadrant (RUQ) of the retroperitoneum, the posterosuperior region of Couinaud liver segment 7 (bare area) is directly connected to the anterior pararenal space. The rupture or exophyte of the hepatocellular carcinoma on the bare area could invade the retroperitoneum, which may lead to inaccurate diagnosis of the condition. When the mass or the hemorrhage in the RUQ of the retroperitoneum is observed in computed tomography images, it is possible that ruptured hepatocellular carcinoma or a mass on the bare area of the liver, looks like a spontaneous retroperitoneal hemorrhage in the RUQ area for example a right adrenal hemorrhage. Keywords: adrenal hematoma, hepatocellular carcinoma rupture, spontaneous retroperitoneal hermorrahge
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