Detection and Identification of Renal Masses by Abdominal Ultrasonography and Incidence Estimation

Joo, Kwan Joong; Yoon, Duck Ki

Abstract

Abdominal ultrasonography was performed in 25,622 adults during the period from July 1992 to June 1995 at the Helth Care Examination Center. The renal masses detected and identified by abdominal sonography were investigated to estimate the incidence of each identification. Renal masses were found in 562 cases(2.19%). Of five hundred and sixty two cases, 555(98.75%) were cystic masses and seven(1.25%) were solid masses. Of five hundred and fifty five cystic masses, 550 were simple cyst(97.86%), four polycystic kindney(0.71%) and one cystic renal cell carcinoma(0.18%). Of seven solid masses, two were angiomyolipoma(0.36%) and another four were renal cell carcinoma(0.71%). The rest one case revealed equivocal finding on an ultrasonography, but the patient refused further study. Although the study population was not a random sampling, the incidence of simple cyst was 2,146 per 100,000 in adult and that of renal cell carcinoma was 19 per 100,000 in adult. Furthermore, ultrasonography is a useful tool for screening the renal carcinoma at the low cost.