Table 1. Patients’ clinical and pathological characteristics.

Total number of cases		99 (100%)
Patient age (years)Median: 43	≤35	10 (10.1%)
	36–40	22 (22.2%)
	41–45	36 (36.4%)
	46–50	28 (28.3%)
	>50	3 (3%)
Size (T)	pT1a	1 (1%)
	pT1b	10 (10.1%)
	pT1c	35 (35.4%)
	pT2	53 (53.5%)
Lymph Nodes (N)	pN0	71 (71.7%)
	pN1mic	2 (1%)
	pN1	26 (26.3%)
Clinical Stage	IA	38 (38.4%)
	IB	2 (2%)
	IIA	37 (37.4%)
	IIB	22 (22.2%)
Tumor subtype	Invasive ductal carcinoma	88 (89%)
	Invasive lobular carcinoma	4 (4%)
	Mucinous carcinoma	3 (3%)
	Other	3 (3%)
	Not available	1 (1%)
Tumor grade	I	11 (11.1%)
	II	73 (73.8%)
	III	11 (11.1%)
	Not available	4 (4%)
Ki67	<20%	44 (44.4%)
	≥20%	44 (44.4%)
	Not available	11 (11.1%)
Estrogen receptor	Positive	99 (100%)
	Negative	0 (0%)
Progesterone receptor	Positive	89 (90%)
	Negative	6 (6%)
	Not available	4 (4%)
EPclin score	Low-risk	46 (46.5%)
	High-risk	53 (53.5%)