Abstract
A case of chronic renal failure, associated with a pseudocyst in the formerly nephrectomized area, is reported.
A 71-year-old man was admitted with a chief complaint of a mass in the right upper quadrant of the abdomen, which had initially been pointed out three years previously. He had been on a long-term hemodialysis program since 1982 because of renal tuberculosis. Right nephrectomy was performed because of renal hemorrhage in 1983. He had noticed a recent increase in the size of his abdominal mass. Physical examination revealed a large, hard mass, measuring 10×7×7cm in his abdomen. CT and MRI revealed a cystic tumor with homogenous content and an uneven, thick wall. Demarcation of the wall from the adjacent organs was obscure in some places. The mass was extirpated surgically, and was found to measure 12.5×8.5×5.5cm, to weigh 454g and to be an old hematoma containing blood clots. The cyst wall was thick and hard but no living cells were identified on its inner surface. Therefore, the tumor was diagnosed as a retroperitoneal pseudocyst (with hematoma). This lesion might have been caused by chronic exudative hemorrhage from the wall of the nephrectomized region.
