tailieunhanh - Ebook Diagnostic imaging pediatrics: Part 2

(BQ) Part 2 book "Diagnostic imaging pediatrics" presents the following contents: Inflammatory bowel disease, congenital abnormalities, multicystic renal disease, uterine and ovarian abnormalities, testicular abnormalities, miscellaneous renal conditions, focal bone lesions,. | Diagnostic Imaging Pediatrics Left Coronal CECT shows multiple hypodense lesions in the liver E3 spleen Ỉr2í and kidneys J. A small amount of ascites is also present. Right Axial CECT of the abdomen shows a nodal mass in the region of the porta hepatis. PTLD is often caused by Epstein-Barr virus. Risk factors for developing PTLD include childhood increased immunosuppression and patients seronegative for Epstein-Barr virus at the time of transplantation. Left Transverse ultrasound of the abdomen in an 11 year old with prior history of liver transplant shows a target appearance of colon typical of ileocolic intussusception. Right Posterior prone image from an air enema in the same patient shows a soft tissue mass filling the ascending colon. An intussusception in a patient with a history of transplant should be considered to be caused by PTLD until proven otherwise. Pseudomembranous Colitis Table of Contents Section 4 - Gastrointestinal Abnormalities in Immunocompromised Children Pseudomembranous Colitis Pseudomembranous Colitis Christopher G. Anton MD Key Facts Terminology Definition Inflammation of colon caused by Clostridium difficile toxins A B produced by this organism Imaging Classic imaging appearance Marked colonic submucosal edema causing wall thickening nodularity over a long colonic segment Usually pancolitis Rectum sigmoid colon Up to 95 of cases Radiographs Thumbprinting small bowel ileus uncommon toxic megacolon thumbprinting most commonly transverse colon CECT findings Accordion sign Alternating bands of higher attenuation enteric contrast lower attenuation thickened haustral folds Target sign Hyperemic enhancing mucosa surrounded by thickened low-attenuation submucosa edema Best imaging approach is CECT Pathology Increasing incidence of a more virulent C. difficile strain NAP1 BI 027 Additional binary toxin Ỷ morbidity and mortality Ỷ in patients on proton pump inhibitors 800 Diagnostic Imaging Pediatrics Diagnostic Checklist Patients with history of