A Case of a Giant Fibroadenoma of the Breast Grown to 10 cm in Diameter through Two Pregnancies

Abstract

The patient was a 36-year-old woman who presented to a local doctor with a left breast tumor measuring 10 cm in diameter. Prior to her visit and after giving birth to her first child, she noticed a 2 cm mass in her left breast, which continued to grow to about 10 × 10 cm in diameter during her two subsequent pregnancies. A vacuum-assisted biopsy demonstrated fibroadenoma, but a possibility of phyllodes tumor could not be ruled out and she was referred to our hospital for surgical treatment. Physical examination revealed a palpable mass measuring 10 cm that occupied the entire left breast. Because the mammary gland had been significantly compressed by the giant tumor, there was a possibility that the breast would be deformed after removal. After obtaining informed consent for the possibility of deformation of the breast, surgical excision was performed with a skin incision in the inframammary fold. The postoperative cosmetic outcome was good, with no noticeable asymmetry. The pathological diagnosis was fibroadenoma. There are other cases of compressed breast by a huge fibroadenoma, in which most breasts could regain their natural contures after removal of benign tumors. We can expect postoperative cosmeticity even for large tumors with longer than 3 years of prevalence period to some degree.