Other intriguing observations include a mutual exclusion in lower grade glioma between ATRX and CIC, a transcriptional repressor that may play a role in development of the central nervous system [38], and mutual exclusion in uterine corpus endometrial carcinoma between mutations at TP53 and SWI/SNF remodeling complex protein ARID1A (Additional file 5: Table S2). The gene discussed is ATRX; the disease is central nervous system cancer.