Endoscopic Ultrasonography for Preoperative Staging of Rectal Lesions

Abstract

In 2020, it is estimated that 43,000 new cases of primary de novo rectal cancer will be diagnosed within the USA. Rectal cancer T stage accuracy of EUS has room for improvement. Fine needle aspiration (FNA) or biopsy has emerged as an essential component of loco-regional clinical staging. FNA can identify M1a disease and may upstage 7% of patients presenting for evaluation. Staging with EUS following neoadjuvant therapy should be approached with caution. EUS-FNA of the rectal wall or extramural perirectal space is useful to establish