Histologic assessment of ligament vascularity and synovitis in dogs with cranial cruciate ligament disease
2019
OBJECTIVE: To assess the relationship between histologic degeneration of cranial cruciate ligaments (CCLs) and severity of synovitis and ligament vascularity. SAMPLE: CCL and synovium from 59 stifle joints (53 dogs). PROCEDURES: CCL and synovium specimens were obtained from stifle joints of juvenile (15 joints; 12 dogs) and adult (25 joints; 22 dogs) dogs with intact CCLs and dogs with CCL rupture (rCCL; 19 joints; 19 dogs). Vascular density and degenerative changes of the CCL core region and severity of synovitis were semiquantitatively evaluated. Relationships were analyzed by use of a random effects model to account for correlated specimens. RESULTS: Mean ± SD modified Bonar scores (scale, 0 to 9) of adults (4.85 ± 0.44) and dogs with rCCL (5.69 ± 0.49) were significantly higher than scores of juveniles (1.13 ± 0.55). Vascularity scores (scale, 0 to 3) were significantly higher for juveniles (3.00 ± 0.24) than for adults (1.53 ± 0.27) and dogs with rCCL (0.78 ± 0.23). Synovitis scores were not signific...
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