Introduction: Lactating adenoma is the commonest benign breast lesion seen during pregnancy and puerperium. It is commonly seen in young primigravideous women in the second or third decade during the third trimester of their pregnancy. Occasionally, lactating adenoma is large and rapidly growing and must be differentiated from malignant breast masses that could be seen during pregnancy and lactation. The diagnosis is usually established by cytological and histopathological examination.
Case presentation: Here we have presented a rare case with huge lactating adenoma arising in the left breast of 38 years old Egyptian multiparous lady during lactation. Enucleation of the mass was done with good aesthetic outcome.
Conclusion: The case we have presented was unique in its huge size and in being diagnosed in a multiparous lady and furthermore it was successfully treated by enucleation without any need for reconstruction.
Keywords: Lactating; adenoma; benign; pregnancy.