Surgical management of a retroperitoneal pelvic desmoid tumour involving the sacrifice of external iliac vein and internal iliac vessels

Highlights • Retroperitoneal pelvic desmoid tumours are rare with limited publications. • A rare case of a retroperitoneal pelvic desmoid tumour is discussed. • Excision was challenging requiring the sacrifice of some of the iliac vessels. • No other case reports document a surgical excision requiring this. • To date our patient suffers minimal morbidity and has had no recurrences.