Overview

• A benign breast tumour with fibrous and glandular tissue
• Most common in women between 15-35 yrs old (most common breast tumour in women <35 yrs old)
• Unknown aetiology, but it is believed there is a hormonal relationship → increased oestrogen (during pregnancy or before menstruation), may stimulate growth
• No increase in risk of malignancy (unlike cyst)

Making Diagnosis

Clinical Features:

• Well defined, mobile mass
• Smooth
• Most commonly solitary
• Non-tender
• Rubbery consistency

<aside> 💡 Mobile, firm, smooth breast lump - a 'breast mouse'

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No cervical lymphadenopathy or signs of malignancy.

Investigations:

• Ultrasound (<35 yrs old) → well defined mass