Power doppler sonography in early renal transplantation: does it differentiate acute graft rejection from acute tubular necrosis?

To evaluate the role of power Doppler in the identification and differentiation between acute renal transplant rejection and acute tubular necrosis (ATN), we studied 67 live donor renal transplant recipients. All patients were examined by spectral and power Doppler sonography. Assessment of cortical perfusion (CP) by power Doppler was subjective, using our grading score system: P0 (normal CP); homogenous cortical blush extending to the capsule, P1 (reduced CP); cortical vascular cut-off at interlobular level, P2 (markedly reduced CP); scattered cortical color flow at the interlobar level.

Cysts of the lower male genitourinary tract: embryologic and anatomic considerations and differential diagnosis.

Cysts of the lower male genitourinary tract are uncommon and usually benign. These cysts have different anatomic origins and may be associated with a variety of genitourinary abnormalities and symptoms. Various complications may be associated with these cysts, such as urinary tract infection, pain, postvoiding incontinence, recurrent epididymitis, prostatitis, and hematospermia, and they may cause infertility.

Genitourinary schistosomiasis: life cycle and radiologic-pathologic findings.

Genitourinary schistosomiasis is produced by Schistosoma haematobium, a species of fluke that is endemic to Africa and the Middle East, and causes substantial morbidity and mortality in those regions. It also may be seen elsewhere, as a result of travel or immigration. S haematobium, one of the five fluke species that account for most human cases of schistosomiasis, is the only species that infects the genitourinary system, where it may lead to a wide spectrum of clinical symptoms and signs.

Quantitative enhancement washout analysis of solid cortical renal masses using multidetector computed tomography.

Purpose: The aim of the study was to prospectively assess the utility of quantitative enhancement washout method in the differentiation of benign solid renal masses from various subtypes of malignant masses using multidetector computed tomography.

Methods: In a prospective investigation from January 2009 to May 2010, 97 patients with solid renal masses underwent CT scan examination with unenhanced, arterial, parenchymal, and delayed phases. The following features were analyzed: the maximum attenuation value in each phase, attenuation difference (enhancement) of the mass in each phase from the unenhanced phase (ΔH), and parenchymal and delayed phases' washout.