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ARRS COTW- September 24, 2018
GASTROINTESTINAL IMAGING: Liver Case Author: Cynthia Santillan, MD, University of California, San Diego History 68-year-old woman with abdominal pain. Imaging Findings Axial T2-weighted MR images of the abdomen (A and B) show innumerable thin-walled high-signal-intensity structures of varying sizes throughout the liver. Axial T2-weighted image of the kidneys (C) shows nearly complete replacement of the…
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ARRS COTW- September 10, 2018
CHEST IMAGING: Immunocompromised Case Author: Maria Shiau, MD, New York University School of Medicine, Langone Medical Center History 57-year-old man with fever and neutropenia after heart transplant. Imaging Findings Axial CT images in lung windows (A and B) show patchy, nodular ground-glass opacity in the right middle and left lower lobes. Diagnosis Invasive aspergillosis Teaching…
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ARRS COTW- September 5, 2018
PEDIATRIC RADIOLOGY: Genitourinary Radiology Case Author: Krista L. Birkemeier, MD, Cincinnati Children’s Hospital Medical Center History 15-year-old boy with hematuria, polyuria, and abdominal pain radiating to the right side of the scrotum. Imaging Findings Longitudinal gray-scale and color Doppler ultrasound images of the left (A and B) and right (C and D) kidneys show diffuse…
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ARRS COTW- August 27, 2018
ULTRASOUND: Vascular Case Author: Deborah Rubens, MD, University of Rochester History 37-year-old woman with right leg swelling that has lasted for 1 week. Imaging Findings Sagittal ultrasound image with spectral tracing of the right common femoral vein (A) shows a patent vessel with a monophasic waveform. Sagittal ultrasound image with spectral tracing of the…
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ARRS COTW- August 13, 2018
MUSCULOSKELETAL IMAGING: Metabolic/Hematologic Case Author: Daniel E. Wessell, MD, PhD, Mallinckrodt Institute of Radiology at Washington University in Saint Louis History 29-year-old man with bilateral hand pain. Imaging Findings Dorsopalmar radiographs of the left (A) and right (B) hands show brachydactyly, brachyphalangia, undertubulation of the metacarpals and phalanges, ulnar exostoses, and diffuse soft-tissue calcifications. Magnified…
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ARRS COTW- July 30, 2018
GENITOURINARY IMAGING: Collecting System, Ureter, Bladder Case Author: Rupan Sanyal, MD, University of Alabama at Birmingham History 48-year-old man with 3 months of fever and persistent right flank pain. Imaging Findings Axial contrast-enhanced CT image (A) shows a dilated upper right renal calyx with a focus of gas (arrow). Axial CT image (B) caudal to…
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ARRS COTW- July 23, 2018
NEURORADIOLOGY: Pediatric/Congenital Case Author: Sumit Pruthi, MBBS, Monroe Carrell Jr. Children’s Hospital at Vanderbilt University History 2-week-old male infant with a bump on the head. Imaging Findings CT scan of the head (A) shows a fluid collection similar to high attenuation in relation to the surrounding tissue along the posterior midline overlying the occipital bone.…
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ARRS COTW- July 16, 2018
GASTROINTESTINAL IMAGING: Liver Case Author: Hanna M. Zafar, MD, MHS, University of Pennsylvania History 55-year-old man with left flank pain; CT has been performed, and a recommendation based on the findings must be made. Imaging Findings Axial unenhanced CT images (A and B) show diffuse low attenuation of the liver (–2 HU). An ill-defined area…
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ARRS COTW- July 9, 2018
CARDIOVASCULAR IMAGING: Thoracic Imaging Case Author: Diana Litmanovich, MD, Beth Israel Deaconness Medical Center History 25-year-old woman with a temperature of 38.0°C, leukocytosis, and 3 weeks of malaise, low-grade fever, and mild to moderate chest pain after being in good health; CT angiography, ultrasound, and MR angiography have been performed, and the next step must…
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ARRS COTW- July 2, 2018
CHEST IMAGING: Immunocompromised Case Author: Maria Shiau, MD, New York University School of Medicine, Langone Medical Center History 47-year-old man with positive HIV status, CD4 lymphocyte count of 500/mL, a painful penile lesion, and right lower quadrant pain. Imaging Findings Axial CT image (A) at the level of the aortic arch shows enlarged, necrotic anterior…