| Summary: | Post-partum galactocele is a common benign disease among breastfeeding women, whereas
retromammary and peri-implant galactocele are relatively rare conditions. Herein, a 34-yearold,
1 month-postpartum female, who had augmentation mammoplasty and a 1-month history
of breast pump use, presented with left breast enlargement for 2 weeks. An initial left breast
US revealed hyperechoic peri-implant fluid collection. Additional US-guided fine needle aspiration
was done using a 21G-needle, draining the milk component in the process, and cytologic
results revealed numerous crystals, suggestive of galactocele. Various diseases, especially
breast implant-associated anaplastic large cell lymphoma, can cause peri-implant fluid collection
in an augmented breast. Thus, correlating imaging features with clinical information and
cytologic analysis plays an important role in appropriate management.
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