Publications by authors named "Monzer Abu-Yousef"

Purpose: We aimed to present three new ultrasound signs-gallbladder scalloping, mammillated caudate lobe, and inferior vena cava scalloping-and determine their accuracy in diagnosing liver cirrhosis.

Materials And Methods: A total of 201 consecutive patients with a history of chronic liver disease who had undergone ultrasound imaging and liver biopsy were identified. A senior ultrasound radiologist blindly reviewed the ultrasound examinations.

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Objective: The aim of this retrospective study was to develop a thyroid nodule scoring system for malignancy potential to better select nodules for ultrasound (US)-guided fine needle aspiration (FNA).

Materials And Methods: US-guided FNA was performed on 2375 thyroid nodules in successive patients. Cytologic or histopathologic confirmation of disease state in 2002 lesions showed that 148 were malignant.

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Purpose: The purpose of this study was to prospectively compare the efficacy of 2 oral ultrasonography (US) contrast agents (simethicone-water rotation [SWR] and simethicone-coated cellulose [SCC]) in improving visualization of the pancreas.

Methods: Two sessions (SWR and SCC) of transabdominal US studies were performed on 38 healthy volunteers. In each session, US images were obtained in precontrast supine and upright positions and postcontrast supine and upright positions.

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We examined records of patients who underwent ultrasound-guided fine needle aspiration biopsy (USGFNAB) of neck lesions to determine whether there was a significantly increased incidence of bleeding complications in patients on antithrombotic and/or anticoagulant (AT/AC) medications compared to patients not receiving AT/AC therapy. Our institutional review board approved this Health Insurance Portability and Accountability Act-compliant retrospective examination of patients' medical data without requiring informed consent. The records of 593 patients (422 women and 171 men ranging from 18 to 91 years of age) who underwent USGFNAB of 788 total neck lesions over an 18-month period were reviewed to determine AT/AC medication used and evidence of USGFNAB-related bleeding complications.

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Doppler ultrasonography (US) is usually the first-line modality for evaluating flow in native liver vessels and transjugular intrahepatic portosystemic shunts (TIPS). Waveforms, which represent flow in each of the major vessels and in TIPS, have been well described. The appearance of these waveforms should be recognized, and the mechanisms behind their generation should be understood by those interpreting these examinations.

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Purpose: To find out if "tubular ectasia of the epididymis" is suggestive of postvasectomy status.

Methods: Tubular ectasia of the epididymis is defined as enlargement of the epididymis with multiple interfaces (i.e.

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Purpose: To evaluate the accuracy and clinical role of gadolinium-enhanced 3D magnetic resonance angiography (MRA) in patients with suspected hepatic arterial complications after liver transplantation.

Materials And Methods: Thirty-six consecutive MRA studies were performed in 33 liver transplant recipients after transplantation. MRA image quality was assessed subjectively.

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We present 3 cases of diffuse infiltration of the testes and epididymides by malignant lymphoma and leukemia. Gray-scale and color Doppler sonograms showed diffuse hypoechoic enlargement and hypervascularity of the involved testes and epididymides. The authors emphasize that enlargement and hypervascularity of both the epididymis and testis can be caused by lymphomatous/leukemic involvement and is not always indicative of epididymo-orchitis.

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