Introduction: Columnar cell lesions (CCLs) of the breast comprise a spectrum of benign to atypical entities that have in common variably dilated terminal duct lobular units lined by columnar epithelial cells with prominent apical cytoplasmic snouts. They are increasingly being encountered in breast biopsies because their associated microcalcifications are detected on mammographic screening. Current study aimed to know the proportion and significance of columnar cell lesions seen along with carcinoma breast.Material and methods: Excision biopsy specimens of the breast which included both lumpectomies and mastectomies were studied in the department of pathology. Postchemotherapy specimens were excluded from the study.5 sections each were taken from adjacent breast tissues and studied for columnar cell lesions after staining with hematoxylin, and eosin.100 cases were included in this study.Results: Majority of the cases were diagnosed as IDC grade 2. One or the other columnar cell lesions were seen in the majority of invasive ductal carcinomas. CCLs may be characterized by a single layer of columnar cells (columnar cell change [CCC]), multiple layers with stratification and apical tufting (columnar cell hyperplasia [CCH]), or monomorphic cells with cytologic atypia (flat epithelial atypia [FEA]). The differentiation between CCC, CCH, and FEA is clinically significant: CCC and CCH are considered benign lesions, whereas FEA can be associated with, and even a precursor to, low-grade ductal carcinoma in situ and atypical ductal hyperplasia. Of the total 12 cases of grade 2 IDC, 8 cases (66.6%) showed columnar cell change, 4 of them showed columnar cell hyperplasia (33.3%) and 9 of them showed both flat epithelial atypia and ductal carcinoma in-situ changes (75%). Conclusion:A consistent correlation exists between columnar cell lesions and Carcinoma Breast which is evidenced by the presence of such lesions in diagnosed cases of carcinoma. Since columnar cell lesions represent a significant precursor for carcinoma breast, a multidisciplinary modality of approach will help to detect these lesions much earlier and will prove worthwhile