TABLE 1

Overall Characteristics of 98 ER+/HER2– BC Patients

Characteristic	No. of patients
Age (y)
Mean ± SD	50.4 ± 11.7
Median	48.5 (range, 30–82)
Histologic type
IDC	87 (89)
Lobular	8 (8)
Other	3 (3)
Grade
Grade 1	5 (5)
Grade 2	66 (67)
Grade 3	24 (25)
Grade unknown	3 (3)
PR expression
Negative	34 (35)
Positive	64 (65)
Tumor classification^*
T1	2 (2)
T2	38 (39)
T3	38 (39)
T4	20 (20)
Lymph node classification^*
N0	38 (39)
N1	47 (48)
N2	10 (10)
N3	3 (3)
Distant metastases at ¹⁸F-FDG PET/CT staging^†
M0	84 (86)
M1	14 (14)

↵* Classification after clinical examination and before ¹⁸F-FDG PET/CT according to 7th ed. of AJCC Staging Manual (19).
↵† PET/CT findings: M0 (absence of distant metastases); M1 (distant metastases).
Data in parentheses are percentages unless otherwise indicated.