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Bright echogenic foci in early prostatic carcinoma: sonographic and pathologic correlation.
Radiology 1990 August
One hundred sixty patients with biopsy-proved clinical stage A or B prostatic carcinoma were examined with high-resolution transrectal ultrasonography prior to radical prostatectomy. All tumors showed either a hypoechoic or isoechoic echo pattern. However, 11 patients demonstrated evidence of focal bright echogenic areas at the periphery or within the center of a hypoechoic tumor. Coarse echogenic foci seen in seven patients corresponded pathologically to calcified corpora amylacea in benign tumors of the prostate gland either at the edge of the tumor or scattered throughout the tumor. Seven patients showed a fine, stippled echogenic pattern within the lesion. On a pathologic level, this pattern represented high-grade tumors with extensive central comedonecrosis and calcifications in five patients and an unusual deposit of small intraluminal crystalloid deposits in two patients. Combinations of echo patterns were observed in three patients. This study demonstrates that echogenic foci can be seen within predominantly hypoechoic tumor nodules. Coarse bright echoes, usually at the periphery of the tumor, suggest calcifications in benign prostate glands. Tumor calcifications and intraluminal prostatic crystalloid deposits were located more centrally and had a finer stippled sonographic appearance.
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