Radiology Key

  Acute diverticulitis Acute appendicitis Primary epiploic appendagitis Clinical settings and risk factors Chronic low-fiber diet, physical inactivity, obesity, smoking, and nonsteroidal anti-inflammatory drugs  Obesity, hernia, and unaccustomed exercise Symptoms…

   Histological layers 1st: superficial mucosa 2nd: deep mucosa (muscularis mucosa) 3rd: submucosa 4th: muscularis propria 5th: serosa Neoplastic lesions GIST  O O O  Leiomyoma/leiomyosarcoma  O (O) O  Lipoma   O  …

Fig. 3.1 A papilloma in a 63-year-old man. On esophagography (a), a large esophageal diverticulum with internal filling defect (arrows) is noted, and near the diverticular neck, there is a…

Primary tumor (T) TX Primary tumor cannot be assessed T0 No evidence of primary tumor Tis Carcinoma in situ (intraepithelial or intramucosal carcinoma) T1 Tumor invades into the submucosa T2…

Fig. 12.1 Small bowel infarction due to SMA embolism. Axial contrast-enhanced CT shows nonenhancing SMA due to embolism (arrow). Small bowel loops are dilated filled with fluid and the walls…

Extrinsic causes  Adhesion  Hernia  Volvulus  Neoplasm (serosal invasion) Intrinsic causes  Neoplasm (small bowel origin)  Inflammatory bowel disease  Radiation enteritis  Intramural hematoma  Intussusception  Ischemic enteritis  Postoperative stricture Intraluminal causes  Gallstone  Bezoar…

Fig. 18.1 Familial adenomatous polyps. Coronal-reconstructed 2D (a) and surface rendering images (b) of CT colonography (CTC) demonstrate numerous polyps in the entire colon. (c) Circumferential wall thickening at the…

Fig. 22.1 Atypical lipomatous tumor/well-differentiated lipoma (ALT/WDL). (a) On axial contrast-enhanced CT, a large fatty mass is noted around the left kidney. (b, c) Within the fatty mass, irregular septa…

Fig. 9.1 Partial gastrectomy with B-I anastomosis. (a) UGIS depicts B-I gastroduodenostomy (arrowheads). (b, c) Axial CT images show distal gastrectomy with gastroduodenostomy (Billroth I procedure); the connection between the…