1 week post-partum. Noticed non-painful lump in left breast
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Reasonably well circumscribed, lobulated, heterogeneous solid mass of 2.5cm in diameter with blood flow. Prominent lactiferous ducts adjacent to the nipple in keeping with lactation.
Biopsy result: cores containing expanded breast lobules with cells showing foamy cytoplasm. No malignant appearing cells.
These "tumors" are non-malignant and associated with lactation. They represent conglomerations of lactating breast lobules and can grow rapidly (1 week in this case) to a substantial size thus are of considerable clinical and patient concern but regress once lactation ceases.