Table 1.

Patients’ clinical information

Patients characteristics
# of patients	56
Age, mean ± SD	55.8 ± 15.3
Age, range	20–82
Age group
20–30	3
30–40	8
40–50	12
50–60	11
60–70	11
70–82	11
# of malignant masses	30
# of benign masses	26
Mass characteristics
Size of masses, mean ± SD [cm]	1.7 ± 0.6
# of masses (≦ 2 cm)	34
# of masses (2–5 cm)	22