Korean Journal of Pediatrics 2006;49(9):996-999.
Published online September 15, 2006.
A case of true thymic hyperplasia in the mediastinum with ectopic thymus in the neck
Hyun-Jung Kim, Sun-Hwa Jang, Ji-Sook Park, Eun-Sil Park, Ji-Hyun Seo, Jae-Young Lim, Chan-Hoo Park, Hyang-Ok Woo, Hee-Shang Youn
Department of Pediatrics, College of Medicine, Gyeongsang National University, Jinju, Korea
종격동 진성 흉선 증식증에 동반된 경부 이소 흉선 1례
김현정, 장선화, 박지숙, 박은실, 서지현, 임재영, 박찬후, 우향옥, 윤희상
경상대학교 의과대학 소아과학교실
Correspondence: 
Jae-Young Lim, Email: pedneu@gshp.gsnu.ac.kr
Abstract
True thymic hyperplasia and ectopic thymus are very rare in children. In embryologic aspect, thymus is distributed around cervical area and ends up in mediastinum. This case is simultaneous thymic hyperplasia of neck and mediastinum. Ectopic thymus in the neck and thymic hyperplasia in the mediastinum in children were reported 2 and 7 cases respectively in Korea. In Clinical aspects, these thymic hyperplasia were presented by mass. So we should suspect these benign condition to avoid unnecessary operation or biopsy. We report a case of true thymic hyperplasia in the mediastinum with ectopic thymus in the neck in a 4-month-old male infant and review the relevant literature. We believe this is the first reported case in the world of true thymus hyperplasia in the mediastinum with cervical ectopic thymus in the neck.
Key Words: True thymic hyperplasia , Ectopic thymus


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