PITX3 and sarcoidosis: Genetic material for M. tuberculosis (e.g., M. tuberculosis rRNA and M. tuberculosis RNA polymerase and the mycobacterial virulence factor, SOD A) has been extracted from human sarcoidosis tissues (76–79), and a meta-analysis of 31 case series and case control studies found that 231 of 874 patients with sarcoidosis had positive mycobacterial or non-TB mycobacterial genetic material (77).