Department of Radiology, Masan Samsung General Hospital
ABSTRACT
We evaluated the characteristics of the benign and malignant nodules on transrectal ultrasound in diagnosis ofprostatic disease. Histologic examination of the transperineal prostatic biopsy of the total 47 cases resulted in19 cases of BPH, 8 cases of prostatic cancer, and 20 cases of normal prostatic tissue group. The hypoechoic massin peripheral zone on TRUS had high possibility of prostatic carcinoma and the isoechoic or mixed echogenic massin central gland had high possibility of benign lesion. Hypoechoic haloes around nodules and cysts were noted inBPH and normal prostatic tissue group, that were compatible with benign lesion. The mean value of PSA was 12.0 ng/ ml in BPH, 8.5 ng / ml in normal prostatic tissue group, and 65.6 ng / ml in prostatic cancer, which was veryhigh in prostatic cancer. Between BPH and normal prostatic tissue group, there was no demonstrable difference inlocation of nodule, pattem of calcification, and echogenicity of the nodules on TRUS. The size of prostatic glandwas relatively smaller and mean value of PSA was lower in normal prostatic tissue group, compared with in BPH. Inconclusion, the location of the nodules and PSA value are considered to be important in differentiation of thebenign and malignant prostatic nodules.
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