Fig. 13

Pathology of Group 4; the green arrow refers to the proprioceptors. The proprioceptors were round or oval with regular shapes and smooth edges. a, b VM and VL (HE × 100) at 1 month after patella reduction; c, d VM and VL (immunofluorescence × 100) at 1 month after patella reduction. e, f VM and VL (HE × 100) at 3 months after patella reduction; g, h VM and VL (immunofluorescence × 100) at 3 months after patella reduction