Table 2

Histological criteria for the grading of synovitis

Score0123
Synovial hyperplasiaNoneLimited hyperplasiaBubble-like hyperplasiaHyperplasia, inflammatory, infiltration
Synovial lining hyperplasiaNoneLining visible but hardly hyperplasticSingle areas of hyperplasiaDiffuse hyperplasia
Inflammation around the graftNoneInflammation under patellar sinewInflammation beyond patellar sinewMarked and diffuse inflammation