Adrenal Biopsy under Wide-Bore MR Imaging Guidance

Twenty-four magnetic resonance (MR) imaging-guided percutaneous adrenal biopsies performed between April 2009 and October 2016 were reviewed retrospectively. Epidemiologic, procedural, and histopathologic data were retrospectively collected. Mean size of tumors was 4.3 cm (range, 1.5-16.0 cm). Mean procedure time was 49 min (range, 24-95 min). Mean needle angulation was 27.7° (range, 0°-60°). Mean depth was 9.6 cm (range, 5.8-13.7 cm). The sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of MR imaging-guided biopsy were 95.5%, 100%, 100%, 66.7%, and 95.8%, respectively. There were no immediate or delayed complications. MR imaging guidance seems safe and accurate to target adrenal-gland masses.