Inclusion Criteria:  Histologically proven locally advanced or recurrent pelvic cancer (all subtypes - Rectal, Urological, Gynaecological, Sarcoma) Aged over 18 years Undergoing a multi-visceral extended pelvic resection and requiring reconstruction of a skin and soft tissue defect as a result Time period: 1st July 2016 - 1st July 2021  Exclusion Criteria:  Strong evidence of metastatic or peritoneal disease No immediate flap reconstruction performed at time of extended pelvic resection/pelvic exenteration, or flap reconstruction performed as a delayed procedure or as a response to a complication of prior pelvic exenteration Insufficient patient follow-up (Minimum of 30 days)