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ARRS COTW- November 19, 2018
CARDIOVASCULAR IMAGING: Thoracic Arteries Case Author: Diana Litmanovich, MD, Beth Israel Deaconness Medical Center History 56-year-old woman with shortness of breath and known coagulopathy. Imaging Findings Axial (A) and coronal reformatted (B) contrast-enhanced MDCT images of the chest show a linear filling defect in the right lower lobe pulmonary artery. Correlating lung window CT image…
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Nifty Ultrasound Wiki Post for R1s
http://fasanonet.com/rad/doku.php?id=ultrasound Vascular Abdominal aortic aneurysm Aneurysm is a dilatation of more than 3 cm OR an increase in diameter of 50% greater than original artery The majority of the abdominal aortic aneurysms (AAA) are infrarenal The correct measurement technique is outer wall to outer wall Common iliac aneurysm > 1.7 cm (male) > 1.5 cm…
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ARRS COTW- November 13, 2018
CHEST IMAGING: Immunocompromised Case Author: Maria Shiau, MD, New York University School of Medicine, Langone Medical Center History 25-year-old woman with fever and cough and positive HIV status. Imaging Findings Posteroanterior chest radiograph shows a cavitary lesion in the mid right lung. Diagnosis Pneumocystis jiroveci pneumonia Teaching Points Cavitary lung disease in patients with AIDS…
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ARRS COTW- November 5, 2018
MUSCULOSKELETAL IMAGING: Metabolic/Hematologic Case Author: Daniel E. Wessell, MD, PhD, Mallinckrodt Institute of Radiology at Washington University in Saint Louis History 8-year-old boy with distal right femur pain after recent resection of a lesion from the proximal right tibia. Imaging Findings Anteroposterior (A) and lateral (B) radiographs of the right knee show dense metaphysial bands…
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ARRS COTW- October 29, 2018
NEURORADIOLOGY: Pediatric/Congenital Case Author: Sumit Pruthi, MBBS, Monroe Carrell Jr. Children’s Hospital at Vanderbilt University History 6-year-old boy with fever, irritability, and headache. Imaging Findings Axial (A) and coronal (B) single-shot T2-weighted MR images show moderate lateral ventricular dilatation with transependymal flow of CSF. Also evident in B is a moderate amount of fluid tracking along the…
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ARRS COTW- October 22, 2018
PEDIATRIC RADIOLOGY: Genitourinary Radiology Case Author: Krista L. Birkemeier, MD, Cincinnati Children’s Hospital Medical Center History 1-day-old boy with prenatally diagnosed right multicystic dysplastic kidney and left hydronephrosis Imaging Findings Longitudinal ultrasound image of the left kidney (A) shows moderate pelvocaliectasis. Transverse ultrasound image of the left proximal ureter (B) shows ureteral dilatation (arrow). Longitudinal…
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ARRS COTW- October 15, 2018
BREAST IMAGING: Breast MRI Case Author: Peter R. Eby, MD, Virginia Mason Medical Center History 42-year-old woman with recent excision of desmoid fibromatosis with positive margins and a persistent palpable abnormality. Imaging Findings Targeted ultrasound image (A) of the right breast at the site of the palpable abnormality and previous excisional biopsy shows postsurgical architectural…
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ARRS COTW- October 9, 2018
NUCLEAR MEDICINE: Musculoskeletal Case Author: Gary A. Ulaner, MD, PhD, Memorial Sloan-Kettering Cancer Center History 55-year-old man with lung cancer and chest pain who has undergone bone scanning in an evaluation for bone metastasis; the nuclear technologist says the images look unusual and needs to know the cause. Imaging Findings Anterior (A) and posterior (B)…
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ARRS COTW- October 1, 2018
GENITOURINARY IMAGING: Collecting System, Ureter, Bladder Case Author: Rupan Sanyal, MD, University of Alabama at Birmingham History 40-year-old man with chronic right flank pain. Imaging Findings Axial contrast-enhanced CT image (A) shows severe dilatation of the right renal collecting system. Axial CT image (B) caudal to A shows an enhancing tubular structure (arrowheads) coursing along…
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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…