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Ultrasound images of Benign prostatic hyperplasia

This 80 yr. old male patient presented with lower urinary tract symptoms (LUTS). Transabdominal ultrasound scan images reveal obvious intravesical enlargement of the enlarged median lobeof the prostate.
Post-voiding trans-rectal ultrasound scan (TRUS) images reveal:-
1) large volume of residual urine (303 cc) (more than 40 cc. is abnormal).
2) gross enlargement of the prostate mainly involving the transition zone.
3) intra-vesical enlargement of median lobe.
4) few small cysts in inner gland
5) there is also evidence of corpora amylacea and nodularity in the transition zone.
6) the peripheral zone is compressed by the enlarged transition zone.
Diagnosis: these ultrasound images are diagnostic of benign hyperplasia of prostate.