@cynthiaslife
I was diagnosed with endometrioid adenocarcinoma FIGO 1. After. hysterectomy when the pathologist examined the tissue the cancer was staged at 1a. FIGO is different than stage.

FIGO classification types are made by pathologists when they look at a biopsy under a microscope. FIGO classifications refer to the organization of the cells-how organized they are into a tumor and how they appear. FIGO numbers go from 1-3 with 1 meaning that the cells are not very differentiated.

Stage refers to where the cancer is found. Stage IA: The cancer is found only in the endometrium or less than one-half of the myometrium (muscle in the endometrium lining of the uterus. Each higher stage means that the cancer has spread to more places. Here is an explanation:
Endometrial Cancer Staging

-- https://www.cancer.org/cancer/endometrial-cancer/detection-diagnosis-staging/staging.html

Does this help?