Table 3. Matrix of confusion^* for melanocytic lesion diagnosis.

	Benign	Dysplastic	Melanoma	Total
Benign	73	14	3	90
Dysplastic	27	39	21	87
Melanoma	10	45	77	132
Total	110	98	101	309

^*This matrix is interpreted as follows: for 110 benign lesions, found in the first column, the algorithm diagnosed 73 as benign, 27 as dysplastic and 10 as melanoma. The first row shows the number of lesions diagnosed as benign, with respect to their true diagnosis. The remaining columns and rows, representing dysplastic naevi and melanoma, are interpreted similarly.