Lactating adenoma

Case contributed by Henry Knipe


Left breast mass. Two months post partum.

Patient Data

Age: 20-25 years
Gender: Female

The palpable mass correlates to a 38 x 27 x 12 mm mass with smooth margins and similar echogenicity to the adjacent breast parenchyma. No vascularity. 

Case Discussion

This patient self-detected the lump in her third trimester of pregnancy, and since breastfeeding, the lump got larger. The differential diagnosis was fibroadenoma, hamartoma and lactating adenoma.

The patient underwent an ultrasound-guided core biopsy. 


MACROSCOPIC DESCRIPTION: Four tan needle cores 3-14 mm. 

MICROSCOPIC DESCRIPTION: The sections show core biopsies of fibrofatty breast tissue containing benign breast lobules demonstrating lactational change. There is no evidence of dysplasia or malignancy.

Breast, left, 5 o'clock core biopsy: Lactating adenoma (nodular lactational hyperplasia). 

How to use cases

You can use Radiopaedia cases in a variety of ways to help you learn and teach.

Creating your own cases is easy.

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.