Mesenteric lymphadenitis

Suggested Alternatives for Differential Diagnosis Appendicitis, mesenteric lymphadenitis. 

Inflammatory Bowel Disease 61 SchSnlein-Henoch Purpura 62 Mesenteric Lymphadenitis 63 Primary Fat Epiploic Lesions ... 

Mesenteric adenitis is a consequence of an enteric infection, usually viral, that predominantly affects mesenteric lymph nodes. It is the most frequent diagnosis in children who are found to have a normal appendix at surgery (Hayes 2004). Mesenteric lymphadenitis is a self-limiting condition requiring only symptomatic treatment. Mesenteric lymph nodes located at the middle abdomen to the right of the umbilicus, or less frequently at the RLQ, are visualized on US as oval, hypoechoic masses increased in number or size (Fig. 1.75a). In nearly 25% of asymptomatic patients more than five lymph nodes can be observed (Wiersma et al. 2005). Otherwise, a short-axis diameter of 8 mm on CT and 10 mm on US have been proposed as the upper limit of normal lymph node size (Karmazin et al. 2005 Wiersma et al. 2005). Lymphadenopa-... 

Fig. 1.75a,b. Mesenteric lymphadenitis, a US image shows enlarged mesenteric lymph nodes in the region to right of the umbilicus (arrows), b Color Doppler image shows increased flow reflecting hyperemia. Appendix was normal... 

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