Malignant Tumors of the Colon
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…
GASTROINTESTINAL IMAGING
Ischemic Bowel Disease and Vasculitis
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…
Small Bowel Obstruction
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…
Benign Tumors of the Colon
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…
Malignant Diseases of the Mesentery and Omentum
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…
Postoperative Changes and Complications of the Stomach and Duodenum
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…
Abdominal Wall Abnormality and Hernia
Fig. 23.1 Diagram of congenital lesions of the urachus. (a) Patent urachus. (b) Urachal cyst. (c) Urachal sinus. (d) Vesicourachal diverticulum 23.5.2 Abscess in the Urachal Remnant Fig. 23.2 Abscess…
Lymphoma and Metastasis of the Stomach
Fig. 8.1 Mucosa-associated lymphoid tissue (MALT) lymphoma in a 56-year-old female. (a) Endoscopy reveals focal mucosal wall irregularity (arrow) of the stomach high body posterior wall. This lesion is confirmed…
Inflammatory Disease of the Small Bowel
Fig. 11.1 Crohn’s disease: longitudinal ulcer. Long and linear ulcers (arrows) parallel to the mesenteric border 11.5.2 Crohn’s Disease: Cobblestoning Appearance – Small Bowel Follow-Through Findings Fig. 11.2 Advanced stage…
Mucosal Tumor of the Stomach
Pathologic T stage on AJCC 7th edition CT criteria T1 Tumor invades mucosa and submucosa Focal thickening with enhancement in inner and/or middle layer; wall thickening and enhancement of…
