
Contents
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Definition Definition
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Acute Appendicitis Acute Appendicitis
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Epiploic Appendagitis Epiploic Appendagitis
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Typhilitis Typhilitis
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Acute Diverticulitis Acute Diverticulitis
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Omental Infarction Omental Infarction
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Clinical Features Clinical Features
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Anatomy and Physiology Anatomy and Physiology
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Acute Appendicitis Acute Appendicitis
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Acute Diverticulitis Acute Diverticulitis
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Epiploic Appendagitis Epiploic Appendagitis
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Typhilitis Typhilitis
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Omental Infarction Omental Infarction
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How to Approach the Image How to Approach the Image
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Acute Appendicitis Acute Appendicitis
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Ultrasound Ultrasound
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Acute Diverticulitis Acute Diverticulitis
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Epiploic Appendagitis Epiploic Appendagitis
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Typhilitis Typhilitis
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Omental Infarction Omental Infarction
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What Not to Miss What Not to Miss
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Differential Diagnosis Differential Diagnosis
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Mesenteric Lymphadenitis Mesenteric Lymphadenitis
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Pelvic Inflammatory Disease Pelvic Inflammatory Disease
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Ectopic Pregnancy Ectopic Pregnancy
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Right Ureteric Colic Right Ureteric Colic
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Crohn Disease Affecting Terminal Ileum, or Other Causes of Terminal Ileitis Crohn Disease Affecting Terminal Ileum, or Other Causes of Terminal Ileitis
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Colon Carcinoma Colon Carcinoma
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Clinical Issues Clinical Issues
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Further Reading Further Reading
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14 Right Lower Quadrant Emergencies
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Published:February 2016
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Abstract
Acute appendicitis is a major cause of right lower quadrant pain not only in the pediatric but also in the adult population. A close mimic in young adults is terminal ileitis of which, early presentation of Crohn disease is a common culprit. Although ultrasound is a good screening tool, computed tomography (CT) has gained popularity, especially when obese patient body habitus limits optimal evaluation. CT is also useful in accurate diagnosis of non-surgical conditions such as omental infarction or epiploic appendagitis that can mimic acute appendicitis. Typhilitis is largely a clinical diagnosis commonly presenting in an immunocompromised patient, and CT is a good imaging tool to further confirm this diagnosis or exclude other differentials of right lower quadrant pain. The following chapter (15) focuses on key imaging features of common conditions presenting as right lower quadrant pain in adults.
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