These include SMARCB1 (protein also known as INI1) inactivation in malignant rhabdoid tumor, atypical rhabdoid/teratoid tumor, epithelioid sarcoma and undifferentiated sinonasal carcinoma, and SMARCA4 (protein also known as BRG1) inactivation in small cell carcinoma hypercalcemic‐type of the ovary, SMARCA4‐deficient uterine sarcoma/malignant rhabdoid tumor of the uterus, rhabdoid undifferentiated lung carcinoma and gastrointestinal tract carcinoma [15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26]. This evidence concerns the gene SMARCB1 and sinonasal undifferentiated carcinoma.