Table 1 Tumour histology and grading of morphologies found in the patient groups of tamoxifen and unexposed, categorised into Type I, Type II or others

From: MGMT promoter hypermethylation and K-RAS, PTEN and TP53 mutations in tamoxifen-exposed and non-exposed endometrial cancer cases

Endometrial tumours

N

TAM 29

EC 37

TYPE I

G1 endometroid

15

3

12

G2 endometroid

7

2

5

TYPE II

G3 endometroid

7

1

6

Uterine papillary serous carcinoma

7

5

2

Clear-cell endometroid

4

1

3

Carcinosarcoma

14

8

6

Mixed carcinoma

8

5

3

OTHERS

Simple hyperplasia

1

1

0

Complex atypical hyperplasia

1

1

0

Endometrial polyp

0

0

0

Endometrial polyp with stromal hyperplasia

1

1

0

Inactive endometrium

0

0

0

Menstrual endometrium (progestagen effect)

0

0

0

Proliferative

1

1

0

Secretory

0

0

0