EP.TH.664Breast lump recurrence - malignancy or iatrogenic disease process?
Abstract Backgound Fibromatosis is a rare disease, accounting for 0.2% of breast tumours and 3% of soft tissue tumours. Due to its rarity there is a lack of multi centre trials and therefore evidence and guidance on the best treatment options. Likewise, many clinicians are unfamiliar with how to best manage these patients, even in specialist centres. Methods We present the case of a patient presenting with a suspicious breast lump, diagnosed as fibromatosis. Literature search enabled review of current trends and opinions in the management of such patients. Results We discuss the case of a 70 year old patient with a right breast lump, presenting 3 years following wide local excision and radiotherapy for DCIS. Imaging and examination were suspicious for malignancy. Biopsy demonstrated fibromatosis, for which the patient is currently being managed with active observation. Discussion and Conclusion Desmoid tumours of the breast are a rare but important differential in patients presenting with a breast lump. The aetiology remains poorly understood but they have been linked to genetic conditions, and trauma. As with this case, trauma may be iatrogenic in the form of surgery or radiotherapy. Due to the destructive nature of fibromatosis, the current trend in the management of these patients advocates wide local excision where possible. However, there is a high recurrence rate. There has been some success with medical therapies such as NSAIDs and tyrosine kinase inhibitors. These may be viable options in patients in whom surgery is not suitable.