RESUMEN
<p><b>OBJECTIVE</b>To evaluate the clinical significance of breast duct endoscope for plasma cell mastitis.</p><p><b>METHODS</b>Breast duct endoscope was performed on 250 patients with nipple discharge. The characters of 95 cases of plasma cell mastitis under the breast duct endoscope were analyzed and studied.</p><p><b>RESULTS</b>Among the 95 cases with plasma cell mastitis, 21 were in type I, 43 in type II, 18 in type III and 13 in type IV. Eighty-three cases were treated with no-operation treatment, and 45 completely released, 38 partly released. There were 5 cases with middle to serious atypical hyperplasia in 12 cases treated with operation, that were all confirmed by pathological examination.</p><p><b>CONCLUSION</b>In patients with plasma cell mastitis, clear diagnosis can be made through breast duct endoscope, and the breast duct with lesions could be positioned. It is a necessary assistant method for patients to avoid biopsy or decrease the biopsy range.</p>