Concurrent use of aromatase inhibitors and hypofractionated radiation therapy

Table 1 Patients’ and tumors’ characteristics

Characteristics
Number of patients	66
Median age in years (range)	80 (56-92)
Stage, n (%)
I	28 (42.4)
II	23 (34.8)
III	10 (18)
IV	5 (5)
Histological type, n (%)
Invasive ductal carcinoma	54 (81.8)
Invasive lobular carcinoma	11 (16.6)
Other histology	1 (1.6)
Grade, n (%)
1	15 (22.7)
2	38 (57.6)
3	11 (16.6)
NR	2 (3.1)
Mitotic index, n (%)
Low	42 (63.6)
Intermediate	11 (16.7)
High	7 (10.6)
NR	6 (9.1)
Expression of endocrine receptors, % (median)
ER	100 (60-100)
PgR	100 (60–100)
HER2 status, n (%)
Positive	11 (16.6)
Negative	55 (83.4)

ER: Estrogen receptor; HER2: Human epidermal growth factor receptor 2; n: Number of patients; PgR: Progesterone receptor; NR: Not reported.