Giant fibroepithelial breast polyp

Abstract

Introduction: Fibroepithelial polyps are common benign skin lesionsrarely noted in the female nipple. In this location, they have the potentialto ulcerate and cause bloody discharge.Case history: A 55-year-old female patient presented to a breast clinicwith a left nipple lesion present since childhood. The patient self-reportedthat the lesion had increased in size. Clinical examination revealed a 9 ×7 cm lesion with a soft and pliable stem extending from the left nipple.Mammography from 2017 revealed this previously measured 6 × 6 cm.An excision biopsy under general anaesthetic preserving the nippleanatomy was undertaken on 18/8/23. There were no immediate or subsequentcomplications. The final histology demonstrated the excised specimenweighed 131 g and measured 90 × 70 × 60 mm with an 8 mm base.The specimen was processed and microscopically found to be a giantfibroepithelial polyp (FEP). The central core of the lesion was formed byexcessive collagen deposition. Normal dermal structures including bloodvessels were still present with no glandular component and there was noevidence of atypia or malignancy.Discussion: FEPs are benign dermal mesenchymal tumours also knownas acrochordons. They are noted most commonly on the neck, axilla,perineum, and thighs but have also been found in the vagina, vulva, orcervix and present in < 2% of cases in the nipple area.FEPs rarely grow larger than 5 cm, with larger lesions rarely reportedin medical literature worldwide. It is possible to excise these lesions andpreserve the nipple anatomy with careful surgical planning.