Objective
To evaluate the clinical application of classification of mammary ductoscopy (MD) in the diagnosis of breast diseases with bloody nipple discharge.
Methods
Mokbel's MD classification system was adjusted,called MD classification. A total of 617 patients with bloody nipple discharge who underwent MD were classified using the MD classification. The diagnostic accuracy of the MD classification was evaluated. Using the pathological results as the standard,the diagnostic result of the MD classification of the patients was compared,and the sensitivity,specificity,positive prognostic value (PPV),negative prognostic value(NPV) and accuracy were calculated. The receiver operating characteristic (ROC) curve was used to evaluate the diagnostic value of the MD classification.
Results
According to the MD classification,of the 617 cases of bloody nipple discharge,MD grade 1 was in 21 cases,MD grade 2 in 71 including 1 with malignancy,MD grade 3 in 386 including 9 with malignancy,MD grade 4 in 43 including 8 with malignancy,and MD grade 5 in 96 including 78 with malignancy. The sensitivity,specificity,PPV,NPV and accuracy of the MD classification were 89.6%,89.8%,61.9%,97.9% and 89.8%,respectively. The area under the ROC curve was 0.897,and the 95%CI was 0.859—0.935.
Conclusions
The MD classification can be used in bloody nipple discharge and,has a clinical value for early diagnosis and reducing missed-diagnosis for breast cancer.