From: The diagnosis of endometrial atypia by hysteroscopy with guided biopsy in postmenopausal patients with hyperplasia: a reliable practice?
Diagnosis of hyperplasia on biopsy
Endometrial thickness
5 to 7 mm
(N = 60)
≥7 to 9 mm
(N = 37)
>9 mm
(N = 2)
Simple
Atypia
No
4 (6.7)
5 (13.5)
0
Yes
23 (38.3)
12 (32.4)
1 (50)
Complex
1 (1.7)
32 (53.3)
20 (54.1)