title: Ultrasonographic findings in diseases of the appendix.
abstract: Ultrasonographic findings in patients with diseases of the appendix, including acute appendicitis, suspected appendiceal abscess, and palpable right-lower-quadrant abdominal mass, are described. An appendiceal abscess may manifest as a cystic mass, a mixed solid and cystic mass, or a hypoechoic solid mass. An appendiceal calculus within an abscess can be recognized as a hyperechoic structure with acoustic shadowing. On ultrasonography, acute appendicitis in female patients may mimic tubo-ovarian disease. Ultrasonographic features of isolated Crohn's disease of the appendix and mucocele of the appendix are also described.
mesh_terms: D000038:Abscess / Q000175:diagnosis; D000293:Adolescent; D000328:Adult; D001064:Appendicitis / Q000175:diagnosis; D001065:Appendix / Q000473:pathology; D002137:Calculi / Q000175:diagnosis; D002429:Cecal Diseases / Q000175:diagnosis / Q000473:pathology; D003424:Crohn Disease / Q000175:diagnosis; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009078:Mucocele / Q000175:diagnosis; D010049:Ovarian Diseases / Q000175:diagnosis; D014463:Ultrasonography