Incidentally detected, small bowel intussusceptions without an identifiable pathological lead point, with a normal wall thickness, a length of less than 3.5 cm, normal nondilated proximal bowel and normal vascularity on color Doppler reduce spontaneously and are of no clinical significance.

In endemic areas like India, ultrasound findings of hepatomegaly, splenomegaly, ileal and cecal thickening, mesenteric lymphadenopathy and thick-walled gallbladder are diagnostic features of typhoid. Ultrasound can be a non-invasive, economical and a reasonably sensitive tool for diagnosing typhoid when serology is equivocal and cultures are negative.

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