EUS-guided fiducial placement for image-guided radiation therapy in GI malignancies by using a 22-gauge needle

Background: Image-guided radiation therapy (IGRT) is dependent on the presence of fiducial markers for target localization and tracking. EUS-guided placement of fiducial markers with a 19-gauge needle has been reported. However, the size and stiffness of the 19-gauge needle may compromise the safety and ease of fiducial placement. Objective: The aim of this study was to evaluate the safety and feasibility of EUS-guided placement of thin flexible gold coil fiducials by using a 22-gauge needle. Design: Retrospective study. Setting: Memorial Sloan-Kettering Cancer Center, between December 2008 and November 2009. Patients: A total of 30 patients with GI malignancies of the mediastinum and upper abdomen who were to undergo IGRT. Interventions: EUS evaluation with a curvilinear-array echoendoscope was performed. The target lesion was identified, a 22-gauge needle preloaded with a gold coil fiducial was inserted into the lesion, and the fiducial was deployed under EUS guidance. Main Outcome Measurements: Technical success was defined as the ability to place fiducials in the desired location. Immediate and delayed complications were also noted. Results: A total of 69 fiducials were placed in 12 different sites in the mediastinum and upper abdomen. Technical success was achieved in 29 out of 30 cases (97%). No intraprocedural complications were encountered. One patient developed a fever and abnormal liver function tests 12 hours after fiducial placement. Limitations: Retrospective design, small case series. Conclusions: EUS-guided placement of thin flexible gold coil fiducials by using a 22-gauge needle is both safe and feasible for upper GI malignancies. (Gastrointest Enclose 2010;71:1204-10.)