The ultrasound appearances of XXXX with histological correlation.

@entity1 @entity263 @entity5
An analysis of the ultrasound appearances of the prostate with its capsule and periprostatic structures was performed in 221 @entity1 with a histologically confirmed diagnosis of @entity263 . The @entity5 were histologically graded into well, moderate and poorly differentiated @entity5 . The results of this study indicate that an ill-defined hypoechoic area is the commonest appearance of @entity263 ; this was seen in 96% of our 221 @entity1 . The @entity5 were staged by ultrasound into confined (T0, T1, T2) and unconfined (T3) @entity5 . A breach of the capsule was seen in 55% of cases. In this unconfined group all @entity5 were hypoechoic in comparison with 92% in the confined group. In the confined @entity5 group the areas of abnormal echogenicity were present in more than one prostatic quadrant in 76%. Mostly commonly two prostatic quadrants were affected. The abnormal echogenicity was noted in the posterior quadrants of the prostate more commonly (58%) than in the anterior quadrants. The prostate gland appeared round in 67%, semicircular in 25% and crescentic in 8%. The gland was symmetrical in 68%. The prostatic capsule appeared regular in 86% of @entity1 with a confined @entity5 . In 70% of cases of extensive but confined @entity5 there was loss of demarcation between the central and peripheral zones of the gland. The unconfined @entity5 group all had a breach of the capsule and all glands were heterogeneous due to hypoechoic areas. The breach affected more than one quadrant in 81% and most commonly the capsular breach involved two prostatic quadrants. An anterior breach of the capsule was noted much more frequently than a posterior breach. Forty-four per cent of cases had three or four quadrants of the gland involved. In 3% of cases of proven @entity263 no definite ultrasound abnormality could be detected. Calcification was seen within the gland in association with the @entity5 in 63% with approximately equal frequency in confined and unconfined disease. The seminal vesicles showed definite evidence of infiltration in 10%. Both seminal vesicles were seen in 61% and thought to be normal. In 8% only one was seen. Failure to demonstrate either seminal vesicle occurred in 21%. There was no correlation between the ultrasound appearances of @entity263 and the histological grading of the @entity5 .
