Torsion of a wandering spleen is an uncommon diagnosis and rare in children. The entity is commonly misdiagnosed. In our case, a one month old infant presented with an abdominal mass. Ultrasound identified a large heterogeneous mass but also revealed what appeared to be normal splenic tissue below the left hemidiaphragm. The ultrasound findings steered us away from the diagnosis of wandering spleen or splenic infarction. Differential diagnosis of the mass included twisted hemorrhagic ovarian cyst, neoplastic mass, or inflammatory abscess. Postoperative histologic analysis demonstrated splenic infarction.

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Historically, the first case of congenital prepyloric membrane in an infant was documented in 1933 [1]. Since then cases have been reported only sporadically in the literature [2-8]. This is a case of congenital antral web which was identified by real-time ultrasonography, confirmed by barium meal study, and proven at gastrotomy.

Common carotid artery dissection is rare. It is a recognized but uncommon complication when direct percutaneous carotid arteriography is performed.'s2 It can be seen as an extension of aortic d i s~e c t i o n ,~,~ and after t r a~m a .~We report a case of dissection of the common carotid artery after placement of an internal jugular vein catheter detected by dynamic image and color flow Doppler ultrasonography. To our knowledge, it is the first case documented by sonography of iatrogenic common carotid artery (CCA) dissection unrelated to aortic dissection. CASE REPORTA 42-year-old HIV-positive black man was admitted to the hospital with a complaint of short- 250

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