Linburg-Comstock anomaly: A comparison of the prevalence in women with and without clinical carpal tunnel syndrome.

We aimed to compare the prevalence of the Linburg-Comstock anomaly in women with and without a clinical diagnosis of carpal tunnel syndrome. The prevalence of the Linburg-Comstock anomaly was evaluated in 400 hands from 200 women over 40 years of age who were diagnosed clinically with carpal tunnel syndrome (CTS), designated as the CTS group. The volunteer group consisted of 400 hands from 200 healthy women over 40 years of age. The women from both groups were asked to carry out the clinical flexion and pain tests described by Linburg and Comstock (1979) as a basis for the clinical diagnosis. CTS patient ages ranged from 40 to 90 (mean 55.8) years, while volunteer group ages ranged from 40 to 93 (mean 55) years. The flexion test was positive in 305 (76%) hands in the CTS group and 242 (60%) hands in the volunteer group. The pain test was positive in 261 (65%) hands in the CTS group and 108 (27%) hands in the volunteer group. Both tests were positive in 244 (61%) hands in the CTS group and 98 (24%) hands in the volunteer group. All these differences were statistically significant. Based on clinical examination using the flexion and pain tests, the prevalence of Linburg-Comstock anomaly was statistically higher in the group of women with carpal tunnel syndrome than in healthy volunteers.