Conclusion: Especially FNAB findings are easy to confuse with malignancy. We wanted to emphasize to clinician and pathologist to be more alert on distinction of granulomatous mastitis and malignancy. Objective: Triple-negative-breast-cancer (TNBC) that accounts for 10-20 % of all breast carcinomas is defined by the lack of estrogen receptor, progesterone receptor, HER2 expression with agressive clinical behavior. TNBC is categorized into basal like subtype which is characterized by the expression of basal cell markers and normal breast subtypes. Method: We studied on 41 immunohistochemically TNBC patients to determine EGFR, Cytokeratine5/6 (CK5/6), p53, Ki67, GCDFP15 expression patterns by immunohistochemistry, HER2/Chromosome 17 gene status by FISH. Results: Most of the tumors (90,2 %) were invasive ductal carcinomas. p53, Ki67, GCDFP15 mean positivity rates were 55,6 %; 51,7 %; 3,2 % respectively. GCDFP15 positivity was noted in 8 cases of which 6 were CK5/6(−). The cut-off value for CK5/6 positivity was 5 %. EGFR immunoreactivity was grouped into 0, 1+ as negative; 2+, 3+ as positive categories. CK5/6 was positive in 56,1 %, EGFR was positive in 51,2 % of the patients. The relation between CK5/6 and EGFR expression was statistically significant (p <0.01). HER2 FISH was negative in all cases. Conclusion: As a result GCDFP15 alone is not a useful marker to detect the metastasis of basaloid type breast cancers. CK5/6 and EGFR coexpression can be used to diagnose basaloid tumors with 5 % cut-off value. Objective: Lobular neoplasia (LNs) of the breast include atypical lobular hyperplasia (ALH) and lobular carcinoma in situ (LCIS). Because LNs do not present typical clinical or radiologic findings, the diagnosis is incidental. Many reports suggest that LN is not only a risk factor of invasive lobular carcinoma but also is as a precursor. It is important to know about the incidence of LNs and associated disease in Korea. Method: A total 1551 cases of breast biopsy or excision from five major hospitals in Daegu were reviewed independently by 5 pathologists of the Daegu Breast Pathology Study Group. The incidence of ALH and LCIS, associated disease, the presence of microcalcification and necrosis were reviewed. All suspected cases of LNs were confirmed on E-cadherin immunohistochemical staining. Results: Only 46 cases out of 1551 cases (2.9 %) revealed LNs. Associated disease were 17cases of invasive ductal carcinoma, 10cases of in situ ductal carcinoma, 6 cases of invasive lobular carcinoma, 5 cases o f other benign disease, and 3 cases of florid ductal hyperplasia or columnar cell change.