It expresses oestrogen receptor (ER)-α in epithelium and ERβ in stromal components, and is known to be hormone dependent.6,7 Small FA (<3 cm) is usually followed up without resection, and 16–37% of FA cases reportedly regress or completely resolve spontaneously.8–10 PT is much less common than FA; it comprises only 2–3% of fibroepithelial breast tumours and accounts for <1% of all breast tumours. The gene discussed is ESR2; the disease is breast neoplasm.