Table 1. Population Characteristics by PT Grade.

	Benign	Borderline	Malignant
Number of patients	13	7	6
Mean age (range)	35.8 (19 - 55)	44.7 (34 - 52)	45.2 (29 - 66)
Size
< 5 cm	6	2	3
≥ 5 cm	7	5	3
Surgical approach
breast-conserving surgery	12	6	2
mastectomy	1	1	4
Surgical margin
negative	6	4	4
close	5	3	2
indeterminate	2	0	0
Outcome
Recurrence	1	3*	2
Metastases	0	1*	2
Favorable	10	4	0
Lost to follow-up	2	0	2

*One patient developed recurrent disease at 10 months and lung metastases at 21 months.