Stage IV includes: IVA: T4, Any N, M0; IVB: Any T, Any N, M1. T4: Uterine corpus endometrial stroma sarcoma with tumor invading bladder or rectum. M0: No distant metastasis. M1: Distant metastasis (excluding adnexa, pelvic, and abdominal tissues). (from AJCC 8th Ed.) [from
NCI]