A MRI classification of periprosthetic soft tissue masses (pseudotumours) associated with metal-on-metal resurfacing hip arthroplasty.

Journal article

Metal-on-metal hip resurfacing arthroplasty (MoMHRA) has become a popular option for young patients requiring hip replacement. A recognised complication is the formation of a symptomatic reactive periprosthetic soft tissue mass (pseudotumour). We present a radiological classification system for these reactive masses, dividing them into three groups: Type I are thin-walled cystic masses (cyst wall <3 mm), Type II are thick-walled cystic masses (cyst wall >3 mm, but less than the diameter of the cystic component) and Type III are predominantly solid masses.

Authors: Hauptfleisch, J; Pandit, H; Grammatopoulos, G; Gill, H; Murray, D

• Journal: Skeletal Radiol
• Volume: 41
• Issue: 2
• Pages: 149-155
• Place of publication: Germany
• Publication date: 2012-02-01
• DOI: 10.1007/s00256-011-1329-6
• EISSN: 1432-2161
• ISSN: 0364-2348
• Language: English
• Keywords: Middle Aged; Aged; Diagnosis, Differential; Adult; Male; Metals; Female; Granuloma, Plasma Cell; Hip Prosthesis; Soft Tissue Infections; Magnetic Resonance Imaging; Humans