An ultrastructural comparison of grade I and II endometrial adenocarcinoma considering estrogen and progesterone receptor status

Abstract Eighteen (18) previously untreated patients with grade I (9) and II (9) endometrial adenocarcinoma provided endometrial samples for biochemical analysis of estrogen and progesterone receptors. The same samples were evaluated by histology and ultrastructure. Progesterone receptor negative samples (PR 1000 fmole/g tissue). These findings appeared to be independent of estrogen receptor status. No significant ultrastructural changes were seen when grades I and II were compared.