Effectiveness of Repeat Angiographic Assessment in Patients Designated for Radioembolization Using Yttrium-90 Microspheres With Initial Extrahepatic Accumulation of Technitium-99m Macroaggregated Albumin: A Single Center’s Experience
- نوع فایل : کتاب
- زبان : انگلیسی
- مؤلف : Oliver Dudeck Skadi Wilhelmsen Gerhard Ulrich David Lo¨wenthal Maciej Pech Holger Amthauer Jens Ricke
- چاپ و سال / کشور: 2011
Description
Purpose To evaluate the efficacy of a workflow consisting of repeat assessment in patients planned for yttrium-90 (90Y) radioembolization in case of nontarget visceral technetium- 99m (99mTc)-macroaggregated albumin (MAA) accumulation despite initial prophylactic coil embolization of nonhepatic arteries. Materials and Methods In 341 patients with primary and secondary liver cancer, pretreatment hepatic angiograms, as well as single-photon emission computed tomography coregistered with magnetic resonance imaging scans, were obtained. Extrahepatic tracer deposition was identified in 33 patients (9.7%) necessitating repeat assessment. Images were reviewed to correlate the site of MAA accumulation with causative gastrointestinal vessels, and repeat angiograms served as reference standard. Results At repeat angiography, the source of extrahepatic flow was identified and eliminated in 31 of 33 patients (93.9%). In 20 patients (60.6%), successful embolization of nontarget vessels was achieved, in 13 patients (39.4%), MAA was administered more distally. Afterward, extrahepatic MAA deposition was eliminated in 30 patients (90.9%). Conclusion The algorithm of repeat assessment in case of extrahepatic MAA accumulation has proven highly effective to eliminate extrahepatic shunting, thus decreasing the risk of postradioembolization complications due to inadvertent visceral microsphere deposition.
Cardiovasc Intervent Radiol Received: 16 June 2011 / Accepted: 23 July 2011
