Imaging in Abdominal Surgery

Eosinophilic Gastroenteritis and Esophagitis

KEY FACTS Terminology Inflammatory disease of GI tract characterized by tissue eosinophilia that can involve all layers of wall "Eosinophilic gastroenteritis" is misnomer; can affect any portion of GI tract Requires 4 criteria for diagnosis Presence of GI symptoms Biopsy…

Vasculitis

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IgG4-Related Disease

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HIV/AIDS

KEY FACTS Terminology Abdominal opportunistic infections and neoplasms resulting from HIV/AIDS-related immunodeficiency Imaging Liver and spleen Small hypodense nodules may be microabscesses Larger hypodense lesions might be infectious, but AIDS-related lymphoma should be considered Pneumocystis may result in tiny calcifications…

Postoperative and Postprocedure Bowel Imaging

KEY FACTS Imaging Afferent loop (AL) syndrome AL becomes obstructed by adhesions, recurrent tumor, internal hernia, etc. CT is better than fluoroscopic studies for this diagnosis Colonoscopy and other endoscopic procedures Prevalence of complications is 1-2% CT shows perforation best…

Imaging of Bariatric Surgery

KEY FACTS Imaging CT and upper GI radiography have complementary roles Laparoscopic adjustable gastric banding (LAGB) procedure (a.k.a. "lap band") Less effective for sustained weight loss Complications: Less common and less varied May be too tight or too loose Band…

Iatrogenic Injury: Feeding Tubes

KEY FACTS Terminology Patient injury caused by improper feeding tube placement Feeding tubes Small, soft enteric tubes Some with flexible metallic tips Tip of feeding tube should be located beyond stomach (distal duodenum or jejunum) Nasogastric tubes Large bore, moderately…

Abdominal Abscess

KEY FACTS Terminology Localized abdominal collection of pus or infected fluid Imaging CT is imaging test of choice : Low density, loculated, encapsulated fluid collection with peripheral rim enhancement Simple fluid density (0-10 HU) or slightly hyperdense Internal gas in…

Abdominal Trauma

KEY FACTS Imaging CT of chest, abdomen, and pelvis can be performed in < 1 minute of scan time Multiplanar, multiphasic CECT shows extent of bowel and solid visceral injuries and bleeding Evaluation of brain and spine injuries can be…