Discussion
inflammation
INFLAMMATION, DEGENERATION, PATHOGENESIS
The pathogenesis of trigger finger/thumb is not clear and is still under study. Many studies suggest that inflammation and age-related degeneration are very important in adult trigger finger/thumb. Kohler et al. found that the senescence of tendon stem cells in terms of cell size and functional adaptability may lead to tendon ageing and degeneration [In trigger finger/thumb, flexor tendons often become swollen and, on a transverse scan, their cross-sectional area is rounder than that of the adjacent unaffected tendons [In the ultrasound examination of the FPL tendon in normal people, we found that C1/ C2 was not affected by age, gender, and the left/ right hands, with a mean value of 0.983 ± 0.103. In patients with trigger thumb, we found that C1/ C2 of both adults and children is much higher than that of normal people. This was consistent with our previous test results [There are several limitations to our study. First, tendon abnormalities are inconstant findings. Kim et al