Purpose: To evaluate safety of resin microsphere radioembolization (RE) without prophylactic embolization of the gastroduodenal artery (GDA).
Materials And Methods: Between July 2013 and April 2015, all patients undergoing RE with resin microspheres for liver-dominant metastatic disease were treated without routine embolization of the GDA. Selective embolization of distal hepaticoenteric vessels was performed if identified by digital subtraction angiography, cone-beam computed tomography, or technetium-99m macroaggregated albumin scintigraphy. Resin microspheres were administered using 5% dextrose flush distal to the origin of the GDA in lobar or segmental fashion, with judicious use of an antireflux microcatheter in recognized high-risk situations. Gastrointestinal toxicity was evaluated by the performing physician for at least 3 months.
Results: RE with resin microspheres was performed in 62 patients undergoing 69 treatments. During planning angiography, embolization of 0 or 1 vessel (median, 1; range, 0-4) was performed in 86% of patients, most commonly the right gastric and supraduodenal arteries. Prophylactic embolization of the GDA was performed in only 2 patients (3%). In 6 treatments (9%), adjunctive embolization was required immediately before RE, and an antireflux microcatheter was used in 14% of treatments. Clinical follow-up was available in 60 of 62 patients (median, 134 d; range, 15-582 d). No signs or symptoms of gastric or duodenal ulceration were observed.
Conclusions: RE using resin microspheres without embolization of the GDA can be performed safely.
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