RT Journal Article SR Electronic T1 Giant juvenile papillomatosis of the breast in a Nigerian girl JF BMJ Case Reports JO BMJ Case Reports FD BMJ Publishing Group Ltd SP e225993 DO 10.1136/bcr-2018-225993 VO 11 IS 1 A1 Sefiya Adebanke Olarinoye-Akorede A1 Bilkisu Farouk A1 Almustapha Aliyu Liman A1 Gbenga Abimbola Kajogbola YR 2018 UL http://casereports.bmj.com/content/11/1/e225993.abstract AB Juvenile papillomatosis is a benign epithelial proliferative tumour of young women. It was recognised as a distinct clinicopathological entity with defining criteria by Rosen et al since 1980. However, giant juvenile papillomatosis is rare. We report a case of a 14-year-old girl who presented to our institution’s breast clinic with a huge right breast mass measuring 20 cm × 15 cm. She had no personal history of previous breast disease and there was no family history of breast cancer. Our initial preoperative diagnosis was of a phylloides tumour. The patient had a total excision of her breast mass which revealed florid juvenile papillomatosis at histology. This presentation highlights the clinical presentation and imaging features of juvenile papillomatosis. The classical histopathological characteristics, unusual microscopic findings and management of a huge-sized tumour in an adolescent Nigerian patient are also presented.