Mammary hamartoma is an uncommon benign breast lesion composed of disorganised but mature mammary ducts, lobules, fibrous stroma, and adipose tissue. Despite its characteristic pathological identity, it is often underrecognised clinically because it can mimic other benign breast masses, such as fibroadenoma and lipoma. A 50-year-old woman presented with a longstanding lump (approximately 35 years) in the right breast that had been first noticed around puberty (approximately at 15 years of age) a