Artit Jinawath 1, Saran Subhadrabandhu2, Suphaneewan Jaovisidha3,Vorachai Sirikulchayanonta4
1 Department of pathology, Ramathibodi hospital, Mahidol University, Bangkok, Thailand.
2 Department of orthopaedics, Ramathibodi hospital, Mahidol University, Bangkok, Thailand.
3 Department of radiology, Ramathibodi hospital, Mahidol University, Bangkok, Thailand.  4Faculty of Science, Rangsit University, Pathumthani 12000, Thailand.
Corresponding author: Artit Jinawath
Email: artitjp@yahoo.com
Address: Department of pathology, Ramathibodi hospital, Mahidol University, Bangkok, Thailand
Received 7th August 2016; Accepted  7th October 2016

Abstract

Low-grade central osteosarcoma accounts for 1-2% of all osteosarcomas, and is usually found in long bones of extremities.  To our best knowledge, low-grade central osteosarcoma of pelvic bone is unusually rare.  We report a case of low-grade central osteosarcoma in the ilium of a 36-year-old man. Our case appears to be the first well-illustrated imagings for this location.  Differential diagnosis includes fibrous dysplasia and conventional fibroblastic type osteosarcoma. The awareness of this entity should lead to avoid over or under treatment.