Table 1.

Accuracy of clinical diagnosis (when compared to histopathological diagnosis)

Histopathology	Malignant	Benign	Total
Clinical impression
Malignant	52	8	60
Benign	3	57	60
Total	55	65	120

a) Sensitivity = 52/55 × 100 = 94.5 % b) Specificity = 57/65 × 100 = 87.7 %

c) Positive predictive value = 52/60 × 100 = 86.7 % d) Negative predictive value = 57/60 × 100 = 95 %

e) Accuracy = 52 + 57/120 = 90.8 %