UCSD Musculoskeletal Radiology

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Pettersson score for Hemophilic arthropathy

Pettersson Score for Hemophilic Arthropathy

Original publication: Pettersson H, Ahlberg A, Nilsson IM. A radiologic

classification of hemophilic arthropathy. Clin Orthop 1980; 149: 153–9.

Type of change Finding Score

Osteoporosis Absent 0 Present 1

Enlarged epiphysis Absent 0 Present 1

Irregular subchondral surface Absent 0 Partially involved 1 Totally involved 2

Narrowing of joint space Absent 0 Joint space >1 mm 1 Joint space <= mm 2

Subchondral cyst formation Absent 0 1 cyst 1 >1 cyst 2

Erosion of joint margins Absent 0 Present 1

Gross incongruence of articulating bone ends Absent 0 Slight 1 Pronounced 2

Joint deformity (angulation and/or displacement between articulating bones) Absent 0 Slight 1 Pronounced 2

Possible joint score (0–13)