Phylloides tumours of the breast: best practice for follow-up.

Phylloides tumours are rare fibroepithelial breast tumours accounting for 1% of breast cancers. No UK guidance exists on the assessment, treatment and follow-up of these patients. To assess the diagnostic accuracy of the clinical core biopsy compared to the gold standard excision biopsy and determine the current follow-up practice and recurrence rate of phylloides tumours across two UK hospital trusts. Multicentre retrospective analysis of all cases of phylloides tumours over 6 years at Worcestershire Acute NHS Trust (WANHST) and Gloucestershire Hospitals NHS Trust (GHNHST). 94 Patients included. Mean age 48 years. Mean clinical and radiological size of lesions 31.7 and 35.4 mm, respectively, preoperative core biopsy sensitivity was 87% for WANHST and 74% for GHNHST with a positive predictive value of 90 and 100%, respectively. 29 Different follow-up regimes were observed from the practice of the 10 surgeons observed following diagnosis and resection of tumours. The follow-up length ranged from discharge following one post-operative clinic attendance to 5-year clinical and/or radiological follow-up. 4 Benign and 2 malignant recurrent phylloides tumours were seen. All benign recurrences were local and found independently of follow-up. The earliest benign phylloides recurrence was at 6 years and the latest at 10 years. There is no standard follow-up of benign or malignant phylloides tumours. This study suggests that in the benign group, the risk of recurrence is small. We advocate no routine follow-up of benign phylloides tumours.