Table 1.

Histopathology of benign and malignant lesions.

Training Data		Validation Data		Test Data
Benign (n = 49)	Malignant (n = 135)	Benign (n = 20)	Malignant (n = 45)	Benign (n = 20)	Malignant (n = 52)
Fibroadenoma 8	Ductal Carcinoma In Situ 22	Fibroadenoma 4	Ductal Carcinoma In Situ 2	Fibroadenoma 4	Ductal Carcinoma In Situ 3
Papilloma 9	Invasive Ductal Carcinoma 91	Papilloma 3	Invasive Ductal Cancer 29	Papilloma 3	Invasive Ductal Carcinoma 38
Mastopathy 4	Mucinous Carcinoma 3	Mastopathy 3	Mucinous Carcinoma 2	Mastopathy 3	Mucinous Carcinoma 1
Benign Phyllodes Tumor 2	Invasive Lobular Carcinoma 7	Non-Specific Benign Lesion 2	Invasive Lobular Carcinoma 5	Non-Specific Benign Lesion 2	Invasive Lobular Carcinoma 1
Non-Specific Benign Lesion 4	Apocrine Carcinoma 2	Not Known * 8	Apocrine Carcinoma 1	Not Known * 8	Apocrine Carcinoma 1
Not Known * 22	Malignant Phyllodes Tumor 1		Malignant Phyllodes Tumor 1		Malignant Phyllodes Tumor 2
	Unclassifiable 9		Unclassifiable 5		Unclassifiable 6

*: Clinically diagnosed by observation, **: Diagnosed by fine needle aspiration.