Clinical Research Directory

Inclusion Criteria: * Grade II or III hemorrhoidal disease as determined by a board-certified colorectal surgeon. * Persistent or recurrent symptoms following hygiene and dietary measures or medication. * Bleeding predominant ± pain symptoms. * Undergoing planned rectal artery embolization (RAE) per standard clinical care. * Male or female with age greater than 18 years, with the capacity and willingness to provide a written informed consent. * Negative pregnancy test (if applicable). Exclusion Criteria: * Prior hemorrhoid surgery. * Grade IV hemorrhoidal disease. * Acute hemorrhoid complications. * Chronic anal or perianal fissures. * History of colorectal surgery or pelvic radiation. * Inflammatory bowel disease. * Portal hypertension or mesenteric venous congestion/occlusion. * Inferior mesenteric artery (IMA) or internal iliac artery (IIA) stenosis or occlusion. * Contraindication to iodinated contrast. * Pregnant and/or breast-feeding subjects. A negative pregnancy test within 48 hours of the procedure per clinical care.