Tumor site	NAC invasion				Test	p-value (Sig.)
Tumor site	Absent (N = 50)		Present (N = 20)		Test	p-value (Sig.)
Non palpable
No	50	100%	18	90%	5.147^‡	0.079 (NS)
Yes	0	0%	2	10%	5.147^‡	0.079 (NS)
Upper outer 1/4
No	16	32%	12	60%	4.667^‡	0.081 (NS)
Yes	34	68%	8	40%	4.667^‡	0.081 (NS)
Upper inner 1/4
No	44	88%	19	95%	0.778^‡	0.664 (NS)
Yes	6	12%	1	5%	0.778^‡	0.664 (NS)
Lower outer 1/4
No	44	88%	20	100%	2.625	0.173 (NS)
Yes	6	12%	0	0%	2.625	0.173 (NS)
Lower inner 1/4
No	47	94%	18	90%	0.345	0.619 (NS)
Yes	3	6%	2	10%	0.345	0.619 (NS)