Breast Clinic of Haedong Hospital was established on January 1992, we have been running the Breast Clinic. Authors analyzed 5653 cases managed at Breast Clinic of Haedong Hospital from January 1992 to December 1996. This analysis revealed the following: 1) The most common abnormal finding was breast mass(26.0%, 1472/5653), followed by tenderness or pain, abnormal radiologic finding. 2) Cytopathologic examination rate was 30.8%(17410/5653), the most common lesion was fibrocystic disease (16.5%, 935/5653), followed by fibroadenoma, mastitis, cancer. 3) Cancer detection rates were 21.41/1000 over all, 46.90/1000 of out-patient group, 1.87/1000 of screening group. 4) Cancer detection rate of nonpalpable lesion with needle localization biopsy was 17.6%(12/68). 5) Of breast cancer patients, pathologic stages were 4.7% of stage 0, 12.3% of stage I, 63.9% of stage II, 17.9% if stage III, 0.9% if stage IV over all. The rates of stage 0, I were 13.9%(14/101) of out-patient group, 80.0%(4/5) of screening group.