Color Doppler ultrasound in renal transplant: role of resistive index versus renal cortical ratio in the evaluation of renal transplant diseases.

Background/aims: Ultrasound (US) and color Doppler are not sensitive enough to detect anomalies in cortical perfusion, which is affected in most graft dysfunctions. The renal cortical ratio (RCR) is a variation in the resistive index (RI) values from the renal artery to cortical vessels, expressed in percent. The aim of this study was to compare the RI and RCR in the differentiation of normal and pathological grafts, to assess the positive predictive value of RCR and show that RCR enables earlier diagnosis than RI.

TRUS staging and follow-up in patients with anal canal cancer.

Purpose: The aim of our study was to define the role of grey-scale transrectal ultrasound in the evaluation, staging and follow-up of patients with histologically diagnosed anal canal cancer.

Materials And Methods: Seventy-six patients underwent digital rectal examination, anoscopy, abdomino-pelvic CT, inguinal and transrectal ultrasound; Fifty-five received combined chemoradiotherapy, whereas 21 received only radiotherapy due to clinical contraindications to chemotherapy. Before and after treatment TNM and UT staging were compared.