Intravascular occlusive therapy: use of interventional radiology in cancer patients.

Selective transcatheter intravascular occlusion in the treatment of cancer patients is a valuable extension of interventional diagnostic radiology. Intra-arterial embolization may be performed with various substances, including autologous clot, autologous subcutaneous tissue, Gelfoam, and stainless steel coil. Clinical applications in cancer patients include control of gastrointestinal and genitourinary hemorrhage, preoperative reduction of tumor vascularity, control of local symptoms, and therapeutic reduction of tumor bulk. The technique has been used for preoperative and palliative treatment of neoplasms of the head and neck, kidney, liver, spleen, and soft tissue and bone. Transcatheter intravascular occlusion should be performed only by radiologists experienced in angiographic techniques. Inadvertent occlusion of a normal vessel and thromboembolism are possible complications.