Fig. 2From: Gelfoam embolization or 125I seed implantation may be a more effective treatment than surgical treatment for giant benign sacral neurogenic tumorsThe computerized tomography (CT) scans of patient B before and after gelatin sponge particle (GSPs) implantation. Patient B received thrice of GSPs implantation in July 2011, April 2012, and December 2013, respectively. a, b The CT scans taken in February 2011; c, d: The CT scans taken in January 2014Back to article page