Urothelial cancer of the renal pelvicaliceal system: unusual imaging manifestations.

Unusual imaging features of urothelial cancer of the renal pelvicaliceal system can be challenging for any radiologist. These manifestations include noncalcified and calcified focal infiltrative parenchymal masses, incidentally detected tumors in a hydronephrotic kidney due to ureteropelvic junction obstruction, transpelvic infiltrating solid masses extending through the retroperitoneum, and tumors primarily invading the perirenal fat. Less common manifestations include massive papillary frond-like projections within a large hydronephrotic sac, large multiloculated cystic masses with thick and irregular septa, tumors invading the renal vein, and paraaortic lymph node metastases as the only sign of an undetectable primary tumor of the renal collecting system.

New sonographic aspects of peyronie disease.

Objective: The aim of this study was to evaluate the role of sonography in the identification of several types of lesions seen in patients with Peyronie disease (PD).

Methods: A total of 78 patients were examined. Penile lesions were counted, classified, and categorized according to their anatomic location and sonographic presentation.

Torsion of the spermatic cord: the main gray-scale and doppler sonographic signs.

Scrotal ultrasonography (US) is usually the initial imaging modality for evaluating patients who present with acute pathologic conditions of the scrotum. Acute epididymitis, acute epididymo-orchitis, torsion of the spermatic cord (TSC), and other acute scrotal abnormalities may have similar findings at clinical examination. Pain and swelling make the clinical examination difficult, sometimes practically impossible, potentially resulting in management delays.

Testicular schistosomiasis caused by Schistosoma mansoni: a case report from Brazil.

Testicular schistosomiasis by Schistosoma mansoni is exceedingly rare, with only 11 cases reported in PubMed. We report a new case from Brazil. A 31-year-old man from the northeast region of the country presented with a 2 cm nodule in the right testis.

Renal cell carcinoma: unusual imaging manifestations.

Unusual radiologic manifestations of a renal cell carcinoma (RCC) can present a diagnostic challenge. These manifestations include bilateral synchronous multifocal tumors, a small RCC with synchronous adrenal metastasis, and RCC associated with bulky abdominal lymphoma. Less common manifestations include multiseptated cystic carcinoma simulating a moderately complex renal cyst at ultrasonography (US), paraaortic metastatic adenopathy as the only sign of an undetectable primary renal neoplasm, RCC causing a large arteriovenous fistula, RCC simulating angiomyolipoma, and a nonfunctioning kidney due to transparenchymal renal propagation of cancer associated with a tumor thrombus occluding the renal vein.

Torsion of the spermatic cord: sonographic diagnosis.

This article describes the ultrasound guidelines for evaluating patients with spermatic cord torsion, including gray-scale, Doppler with spectral analysis, and color and power Doppler sonography. The sonographic and Doppler features of acute, subacute, and chronic torsion of the spermatic cord are demonstrated and discussed.