Diffuse prostatic lesions: role of color Doppler and power Doppler ultrasonography.

Abstract

The purpose of this study was to assess the role of color Doppler ultrasonography and power Doppler ultrasonography in the identification of diffuse prostatic lesions. Forty male patients underwent gray scale transrectal ultrasonography, color and power Doppler sonography, and transrectal ultrasonographically guided biopsy. Transrectal ultrasonographically guided biopsy revealed cancer in 23 patients and benign lesions in 17 patients. Among the prostatic cancers 82.6% (19 of 23) showed increased flow signals, whereas 23.5% (four of 17) of benign lesions showed increased flow signals on color or power Doppler ultrasonography. If we consider increased flow signal on color or power Doppler sonography as a sign of a prostate cancer in diffuse prostatic lesions, these modalities have a sensitivity of 82.6%, specificity of 76.5%, and positive predictive value of 82.6%. On the basis of our study, we may conclude that color and power Doppler ultrasonography are useful in the identification of diffuse prostatic lesions.

Real-time elastography in the diagnosis of prostate tumor

“…Power Doppler (PD) is considered sufficiently sensitive in the detection of slow venous flow in neoplastic lesions of the (894) prostate and more sensitive than CD in the detection of blood flow in the new tumor vessels [24]. Various studies have evaluated the clinical use of PD in the study of prostate cancer [25,26] concluding that PD is useful in the characterization of hypoechoic areas of the posteriorperipheral zone. Sakarya et al concluded that PD increases the sensitivity of TRUS and helps identifying adequate biopsy sites [27].…”

Peripheral Hypoechoic Lesions of the Prostate: Evaluation with Color and Power Doppler Ultrasound

“…Recently, several articles have reported promising results of using color Doppler ultrasound (CDUS) and power Doppler ultrasound (PDUS) in the diagnosis of prostate cancer [2, 3, 4, 5, 6], but the role of CDUS and PDUS in the evaluation of prostatic disease is not well established yet.…”

“…It is known that the lesion in prostate cancer usually has hypervascularity [7], and CDUS/PDUS may be of help in differentiating prostate cancer from benign prostatic diseases by demonstrating local blood flow changes in the lesion compared to signals from surrounding tissue [2, 3, 4, 5, 6]. The purposes of this study were to evaluate the CDUS/ PDUS findings of focal hypoechoic lesions seen on TRUS and to see whether they can be used in differentiating benign and malignant prostatic lesions.…”

Previsão pré-operatória do estadiamento local do câncer prostático: análise multifatorial baseada em parâmetros clínicos, laboratoriais e de imagem por ressonância magnética e ultra-sonografia

“…Estes pesquisadores demonstraram que a maioria das áreas com câncer da zona periférica apresenta hipervascularização quando comparadas com a zona periférica adjacente normal. Com isso, o uso do Doppler colorido (Cornud et al, 1997;Lavoipierre et al, 1998;Rifkin et al, 1993) e mais recentemente do Doppler de amplitude (Power Doppler®, Angio Doppler®) (Cho et al, 1998;Shigeno et al, 2000), que é menos vulnerável às variações de ângulo e mais sensível na detecção de fluxos de baixa velocidade e em pequenos vasos (Rubin et al, 1994), passaram a ser utilizados para melhor localização e detecção do câncer de próstata, adicionando mais informações para o seu correto estadiamento.…”