10.22376/ijpbs.2019.10.1.p1-12 Volume 5 Issue 3 2014 (July- September) Medullary carcinoma is a rare subtype of invasive breast carcinoma, comprising less than 5% of all breast cancers. It is commonly seen between 45-54 years age group and is very rare in ≤ 30year. Case presentation- 30yr female presented with a lump in breast which was diagnosed clinically as fibroadenoma. On histological examination- Medullary carcinoma of breast was diagnosed. Conclusion- We should be very careful in diagnosing breast lump in young female as benign appearing lesion can be a malignant one. So triple test of clinical examination, mammography/ USG & biopsy are essential for diagnostic accuracy and optimal treatment of patient with breast lump. DR. RASHMI NAYAK Medullary breast carcinoma, Lump, Fibroadenoma. 461-464