PT - JOURNAL ARTICLE AU - Higgins, Charles C. TI - Retroperitoneal Tumor DP - 1945 Apr 01 TA - Cleveland Clinic Journal of Medicine PG - 60--64 VI - 12 IP - 2 4099 - http://www.ccjm.org/content/12/2/60.short 4100 - http://www.ccjm.org/content/12/2/60.full SO - Cleve Clin J Med1945 Apr 01; 12