RESUMEN
Objective To evaluate the clinical value of color ultrasound guided coarse needle bioptic histo-pathology in the diagnosis of retroperitoneal solid mass. Methods 32 cases with retroperitoneal solid mass accepted coarse needle biopsy (CNB) guided by color ultrasound, and followed to surgical mass resection. The histopathologi-cal result of CNB was compared to the post-operative pathological diagnosis. Results CNB were successful in all ca-ses and no complications occurred. Compared with the pest-operative pathology,the accuracy of CNB was 93.75% (30/32). There was no false-negative and very low rate of false-positive (3.13% ,1/32) of CNB in diagnosing ma-lignant tumor. Conclusions CNB guided by color ultrasound is a safe and an effective method in diagnosis of retro-peritoneal solid mass.