Primary thymic MALT lymphoma is a rare thymic tumor, with only eight previous cases having been described worldwide to date. We report a case of a 60-year-old Korean woman diagnosed as primary thymic MALT lymphoma. She was found to have an anterior mediastinal tumor during a medical check-up in 2006 and was referred to our hospital for further examination and treatment. The thymus was resected through a median sternotomy and pathology revealed primary thymic MALT lymphoma. Two months later, a follow-up chest CT showed a residual mediastinal soft tissue mass and increased FDG uptake was detected on PET CT scan. The patient was irradiated with 4,140 cGy. After radiation therapy, no evidence of residual soft tissue was found in follow-up chest CT scan and the patient is alive and well 15 months after treatment. We report the details of this case of primary thymic MALT lymphoma treated with irradiation and also offer a review of the literature. (Korean J Med 75:343-348, 2008)

Primary thymic MALT lymphoma is a rare thymic tumor, with only eight previous cases having been described worldwide to date. We report a case of a 60-year-old Korean woman diagnosed as primary thymic MALT lymphoma. She was found to have an anterior mediastinal tumor during a medical check-up in 2006 and was referred to our hospital for further examination and treatment. The thymus was resected through a median sternotomy and pathology revealed primary thymic MALT lymphoma. Two months later, a follow-up chest CT showed a residual mediastinal soft tissue mass and increased FDG uptake was detected on PET CT scan. The patient was irradiated with 4,140 cGy. After radiation therapy, no evidence of residual soft tissue was found in follow-up chest CT scan and the patient is alive and well 15 months after treatment. We report the details of this case of primary thymic MALT lymphoma treated with irradiation and also offer a review of the literature. (Korean J Med 75:343-348, 2008)

저자들은 특별한 증상 없이 흉부전산화단층촬영에서 발견된 종격동내 흉선 종양으로 내원하여 수술적 제거 후 추적 검사상 발견된 잔존 종양에 대해 국소 방사선 치료를 시행한 후 현재까지 15개월간 무병 생존을 보인 원발성 흉선 MALT 림프종 1예를 경험 하였기에 문헌고찰과 함께 보고하는 바이다.

Thymus; Lymphoma; MALT