CT viem DT2004

Figure Normal colon Drawing shows the structures of the colon, including the teniae, haustra, and appendices epiploicae Figure Colonic interposition Drawing shows the colon interposed between the liver and the diaphragm  Figure   Colon in empty renal fossa in a 55-year-old man who underwent nephrectomy for renal cell carcinoma Contrast material-enhanced spiral CT scan shows the colon (C) and spleen (S) located in the left renal fossa   Appendicolith Drawing shows an appendicolith that obstructs the appendiceal lumen, resulting in dilatation of the appendix and wall thickening   Normal appendix Contrastenhanced spiral CT scan shows a normal air-filled appendix (arrow) Figure   Appendicitis Contrastenhanced spiral CT scan shows a dilated, fluid-filled appendix (arrows) Minimal inflammatory changes are also present in the adjacent mesenteric fat Figure   Appendicitis in a patient with acute-onset right lower quadrant pain Spiral CT scan obtained with oral and intravenous contrast material shows enlargement of the appendix, which is filled with fluid (arrows) Adjacent inflammatory stranding is also present Intravenous contrast material can help define the thickened walls of the appendix Figure   Appendicitis in a patient with acute-onset right lower quadrant pain Nonenhanced CT scan shows moderate inflammatory changes in the right lower quadrant An appendicolith is identified (arrow) Figure   Periappendiceal abscess in an 80-year-old woman with right lower quadrant pain and fever Contrast-enhanced CT scan shows an inflammatory mass with an air-fluid level in the right lower quadrant (arrow) and associated inflammatory changes in the pericecal fat A periappendiceal abscess was discovered at surgery Figure 10   Epiploic appendagitis in a 16year-old girl with severe left lower quadrant pain Contrast-enhanced spiral CT scan shows a 2.5-cm-diameter mass (straight arrow) with fat attenuation and mesenteric stranding The mass is adjacent to the descending colon (curved arrow) and was thought to represent inflammation of the appendix epiploica on the basis of the CT findings The patient was treated conservatively, and the pain resolved within 24 hours 10 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 ... Figure 25   Ulcerative colitis CT scan of a patient with long-standing ulcerative colitis shows a submucosal halo of fat within the rectum (arrow) There is also perirectal fibrofatty proliferation...   Pseudomembranous colitis in a patient with severe diarrhea Spiral CT scan obtained with oral contrast material shows rectal thickening (arrows) and perirectal inflammation The remainder of the colon was normal... disease, and myocardial infarction, who had previously undergone coronary artery bypass surgery Abdominal pain and rectal bleeding were present (a) Contrastenhanced CT scan shows heterogeneous