Among the remaining 4 SWI/SNF‐deficient UEC, 1 of 3 SMARCA4‐deficient tumors, and 1 SMARCB1‐deficient tumor were MMR‐deficient and none of the reported cases of SMARCA4‐deficient rhabdoid uterine sarcoma occur in a MMR protein‐deficient context. The gene discussed is MRC1; the disease is neoplasm.