Suat Aytaç

Effect of color Doppler system on the twinkling sign associated with urinary tract calculi.

The aim of this study was to assess the effect of the color Doppler system on the artifact known as the “twinkling sign.”

Aneurysms of the portal venous system: Gray-scale and color doppler ultrasonographic findings with CT and mri correlation

Two cases of incidentally detected aneurysms involving the portal venous system are described with emphasis on gray-scale and color Doppler ultrasonographic (US) findings. Appearing on US as anechoic masses showing direct luminal continuity with the right portal vein and superior mesenteric vein, the lesions displayed spectral findings characteristic of portal venous system on color Doppler US. Dynamic helical computed tomography (CT) demonstrated simultaneous enhancement with the portal system, while the aneurysms were hypointense owing to flow void on T1-weighted spin-echo magnetic resonance (MR) images.

Correlation Between the Diameter of the Main Renal Artery and the Presence of an Accessory Renal Artery Sonographic and Angiographic Evaluation

Objective. To evaluate whether the diameter of the main renal artery is an indicator of the presence of an accessory renal artery in sonographic examination. Methods. Of cases undergoing renal intra‐arterial digital subtraction angiography for any reason, those with no renal arterial disease detected on digital subtraction angiography were included in the investigation. Accessory renal arteries were disclosed by digital subtraction angiographic examinations. The dimensions of the kidney were measured sonographically. The lowest, highest, and mean values of diameters of main renal arteries were determined by sonography and angiography in both the group with accessory renal arteries and the group without accessory renal arteries. Results. Of kidneys with sonographically normal dimensions, angiographic evaluation was made in 107, and sonographic evaluation was made in 97, the renal arteries of which could be visualized optimally. Both radiologic methods showed that diameters of main renal arteries were significantly smaller in the presence of the accessory renal artery (P < .001, Student t test, Mann‐Whitney U test, and receiver operating characteristic curve). Conclusions. In sonographic examination, the presence of the main renal artery with a diameter smaller than usual in a kidney with normal dimensions is indicative of the presence of an accessory renal artery. Taking this into account, we can obtain higher rates of detection of accessory renal arteries in sonographic examinations.

Focal intrahepatic extramedullary hematopoiesis: color Doppler US and CT findings.

Focal intrahepatic extramedullary hematopoiesis is an extremely unusual condition that can mimic any other solid mass of the liver. Only seven cases have been reported in the literature. Color Doppler ultrasonographic findings of this rare entity have not been described. We report a case of focal mass in a myeloid metaplastic patient diagnosed as focal extramedullary hematopoiesis. Color Doppler findings of this rare condition are described and compared with computed tomography features.

Color-Doppler Imaging in Acute Scrotal Disorders

Eighteen patients who referred to our hospital with acute scrotal pain and swelling were evaluated with color-Doppler imaging (CDI) after the initial clinical examinations. Five of these subjects were considered to have testicular torsion as diagnosed with CDI. These diagnoses were surgically confirmed, and appropriate treatments were performed. CDI findings of 13 patients were in accordance with inflammatory pathologies (epididymitis and/or orchitis). These patients received medical treatment. The CDI diagnoses of all patients were in agreement with the final clinical diagnoses. We conclude that CDI, which is a practical, rapid and high-resolution technique, promises to be the leading and decisive scanning method in acute scrotal disorders.

Right Cervical Aortic Arch and Pseudocoarctation of the Aorta Associated with Aneurysms and Steal Phenomena: US, CTA, and MRA Findings

A 55-year-old woman presented with right cervical aortic arch with pseudocoarctation of the aorta further complicated by the presence of multiple aneurysms and a high-grade stenosis at the origin of the left subclavian trunk from the aorta causing a discrepancy in blood pressure between the right and left arms. The branching pattern and the resulting complex steal syndromes involving the left carotid and the subclavian system are unique. The computed tomography angiography, magnetic resonance angiography, and Doppler ultrasound findings are described.

Abscess formation due to dropped gallstone after laparoscopic cholecystectomy

Laparoscopic cholecystectomy is a popular treatment modality of symptomatic gallstones with decreased major complications and shortened hospital stay. Complications following laparoscopic cholecystectomy, most of them involving strictures of biliary tract have been well described in recent reports. However, there are only a few reported cases about dropped gallstones after the procedure, all of which were opaque and easily demonstrated with multiple imaging modalities. An unusual complication of laparoscopic cholecystectomy; abscess formation due to a dropped non-opaque gallstone is described in which diagnosis was suggested with the combination of ultrasound and computed tomography findings and confirmed by surgery.

Testicular Microlithiasis Associated with Seminoma: Gray-Scale and Color Doppler Ultrasound Findings

Testicular microlithiasis associated with seminoma was found in a 32-year-old infertile man. Gray-scale and color Doppler ultrasound findings are discussed and a brief review of the literature is presented.

Doppler Color Flow Imaging for the Evaluation of Postsplenectomy Portal Vein Thrombosis in Pediatric Hematological Diseases

Doppler color flow imaging (DCFI) is a noninvasive technique used for the clinical evaluation of hemodynamic changes in various diseases. 1 Here we report our experience on the use of DCFI for the evaluation of postsplenec-tomy portal vein thrombosis in pediatric hematological diseases.

Adenomyoepithelioma of the breast.

A denomyoepithelioma (AME) is a rare tumor characterized by a balanced bicellular pattern of proliferating epithelial and myoepithelial cells. 1,2 Although it is considered benign in nature, local recurrences and nodal and distant metastases have been reported. 1-6 Current treatment of AME involves total surgical excision of the tumor and a margin of uninvolved tissue as well as long-term follow-up, 7,8 In our case, the radiologic and color Doppler sonographic findings suggested carcinoma. To our knowledge, this is the first report describing the color Doppler sonographic features of AME of the breast.