Kumar Choudhary, Sosamma Methratta, Kristine Fortuna

Hershey, USA

Author Affiliations: Department of Radiology (Dulka S, Choudhary AK, Methratta S) and Department of Orthopedics (Fortuna K), Penn State/Milton S. Hershey Medical Center, 500 University Drive, Hershey, PA, 17036, USA

Corresponding Author: Susan Dulka, MD, Department of Radiology, Penn State/Milton S. Hershey Medical Center, 500 University Drive, Hershey, PA, 17036, USA (Tel: 7175310000; Fax: 717 531 5596; Email: sdulka@hmc.psu.edu)

doi: 10.1007/s12519-011-0315-3

Background: Prader-Willi syndrome (PWS) is a genetic disorder causing multisystem abnormalities with obesity. Obesity is a well established cause of Blount disease.

Methods: A 7-year-old girl with PWS presented with genu varum of the left knee with deformity of the proximal medial tibial condyle, which was consistent with Blount disease.

Results: A lateral physeal stapling and subsequent osteotomy for the left proximal tibia and fibula were performed with improved anatomical alignment.

Conclusion: Blount disease has not been reported in the literature in association with PWS despite excessive obesity.

Key words: Blount disease; genetics; obesity; Prader-Willi syndrome; radiology

World J Pediatr 2013;9(2):182-184