Recent studies showed inactivation of SWI/SNF complex subunits such as INI1 (SMARCB1), BRG1 (SMARCA4) and ARID1A (BAF250a) whose alterations might help distinguish poorly (grade 3) differentiated endometrial carcinoma from DEAC (15,16). Here, ARID1A is linked to endometrial carcinoma.