Background: Painless breast lump is the most common symptom found in maximum number of patients with carcinoma breast. It is also the most common presenting sumptom in many benign diseases of the breast.

Aims: To study painless breast lump by clinical examination, imaging and histo-pathological examination and to know the frequency of benign and malignant breast diseases in premenopausal patients in our society.

Settings: Dept of General Surgery, GMC, Omandurar Estate and ISO KGH, Chennai.

Design: Prospective study.

Methods and Materials: One hundred and five female patients with painless breast lump presented to the Dept of General surgery at GMC, Omandurar Estate and ISO KGH, Chennai during the period of April 2017 and July 2017 were studied. Diagnosis was made by a combination of clinical examination, imaging and histopathological examination.

Results: Painless breast lump in premenopausal women was commonly benign (68%) followed by malignant conditions (32%). The commonest diagnosis was fibroadenoma followed by carcinoma of the breast. The common age group of fibroadenomas was between 16-35yrs and carcinoma breast was between 46-55yrs.

Conclusion: The results of this study showed that though painless breast lump in premenopausal women was commonly fibroadenomas (46%) they also account for a significant number of cases of carcinoma breast (32%).

Keywords: Painless lump; Premenopausal women; Mammogram; Fibroadenoma; Carcinoma breast.