TY - JOUR UR - https://doi.org/10.1007/s10689-021-00275-9 SP - 363 KW - PTEN KW - Cowden syndrome KW - Vulval fibroadenoma KW - Ectopic breast tissue KW - PTEN hamartoma tumour syndrome TI - Fibroadenoma in vulval ectopic breast tissue in a patient with PTEN Hamartoma Tumour Syndrome N1 - This version is the author accepted manuscript. For information on re-use, please refer to the publisher?s terms and conditions. SN - 1389-9600 ID - discovery10158482 AV - public EP - 368 JF - Familial Cancer N2 - PTEN is a tumour suppressor gene involved in regulating cell division. Pathogenic germline variants in PTEN predispose to benign and malignant growths of numerous organs, including of the breast. In the following report, we describe the first documented case of a fibroadenoma developing in ectopic breast tissue of the vulva in a patient with a germline pathogenic variant in PTEN. This highlights the risk of hyperplasia developing in any breast tissue, including rare ectopic sites, particularly in patients with underlying germline variants in cancer susceptibility genes. VL - 21 A1 - Dawson, Hannah A1 - Smrke, Alannah A1 - Ellery, Peter M A1 - Wilkinson, Nafisa A1 - Rosenthal, Adam N A1 - McVeigh, Terri P Y1 - 2022/07// PB - SPRINGER ER -