Gap in the Defenses (image) Rockefeller University Share Print E-Mail Caption Researchers have identified a new immune system deficiency in which mutations in the gene RORC result in susceptibility to otherwise relatively harmless mycobacteria. A six-year-old Chilean girl with RORC defects had mycobacterial abscesses (white) in her brain and abdomen. Credit Macarena Lagos, Padre Hurtado Hospital and Clinica Alemana, Santiago, Chile Usage Restrictions Image may only be used to illustrate the research described in the accompanying release. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.