Abstract
An 85-year-old man was diagnosed with multiple liver cysts on a screening abdominal computed tomography (CT) examination during treatment for diabetes. He had been followed at the Department of Internal Medicine, but due to cystic enlargement and onset of abdominal pain, he was transferred to the Department of Surgery for surgical treatment. Laparoscopic fenestration of the liver cysts was performed, but histopathological examination of the cyst walls revealed a diagnosis of liver metastasis of renal cell carcinoma. The patient had undergone surgery to resect the right kidney due to renal cancer 22 years earlier, and based on histopathological examination, a recurrence of this renal cancer was thought to have occurred. Renal cell carcinoma is a type of tumor that tends to recur with a late onset, but it is rare for a recurrence to occur ≥20 years postoperatively, and cystic liver metastasis is also a rare form of metastasis. The present case is therefore reported in the light of the literature.
