KLK3 and pachyonychia congenita: MSMB levels were higher in controls (the mean MSMB level was 29.7 ng/ml when adjusted by age and total PSA at diagnosis and 29.2 ng/ml when adjusted by age and free PSA at diagnosis) compared to PC patients (the mean MSMB level was 21.1 ng/ml when adjusted by age and total PSA at diagnosis and 22.4 ng/ml when it was adjusted by age and free PSA at diagnosis) (Table 5).