저자들은 현재까지 국내외에 원발성 간세포 암의 전이부 위로 부갑상선이 보고된 적이 없고 현미경적으로 tumor-to-tumor 전이(공여 부위: 간세포암, 수여 부위: 부갑상선 선종)가 병발한 1예를 경험하였기에 문헌고찰과 함께 보고하는 바이다.

Hepatocellular carcinoma (HCC) is the third leading cause of cancer-related death worldwide1). Extrahepatic metastasis of HCC is now increasing due to prolonged survival. Most extrahepatic HCC occurs in patients with advanced stages. The lung, abdominal lymph nodes, and bone are common sites of extrahepatic metastasis. However, the parathyroid gland has not been reported as a metastatic focus. We report the first case of parathyroid metastasis as the first single metastasis site of HCC and microscopic tumor- to-tumor metastasis to a parathyroid adenoma. (Korean J Med 79:686-690, 2010)