Lymphatic filariasis is a parasitic disease, endemic in large areas of India, Africa, and far East. In humans, it is commonly caused by Wucheria bancrofti and Brugia malayi. The breast is an unusual site for the occurrence of filariasis and very few cases have been documented. Other rare sites in which microfilariae are reported include the thyroid nodule, salivary gland, cervico-vaginal smear, ovarian cyst fluid, and bronchial brushings. A 25-year-old female presented with complaint of a gradually increasing lump in left breast since 1 year. She had history of whitish nipple discharge, fever, and pain in left breast since 1 month. There was no history of lactation or any other medical illness. Local examination of left breast revealed a single lump of size 2X2 cm, which was situated in upper outer quadrant. Lump was discrete, non-tender, mobile, and firm in consistency. The overlying skin was normal with normal temperature. No lymph nodes were palpable in either axilla. Clinically, differential diagnosis of fibroadenoma or suppurative mastitis was considered. Her right breast was normal. There were no significant findings on general and systemic physical examination.
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