Five neonatal cases of @entity50 with cervical XXXX : a comparison between sonography and other modalities.

@entity1 @entity5409 @entity292 @entity50 @entity9666
UNASSIGNED: Pyriform sinus @entity292 are an unusual cause of neck @entity5409 in neonates. A definitive diagnosis requires detection of the @entity292 , which originates from the pyriform sinus and extends to the @entity5409 . Sonography has been reported to be useful for detecting @entity292 . However, there have been no reports of neonatal cases in which sonography could detect @entity292 not detected by other modalities, such as barium esophagography, computed tomography (CT), or magnetic resonance imaging (MRI). We describe five neonatal @entity1 with @entity50 -appearing cervical @entity5409 . All @entity1 were examined by sonography; of these, three @entity1 were also examined by barium esophagography, two by CT, and one by MRI. The @entity292 was detected by sonography but not CT in one @entity1 and by @entity9666 esophagography but not MRI in one. Two @entity1 whose @entity292 were detected by sonography had an oval-shaped and relatively small @entity5409 . One @entity1 whose @entity292 could be detected only by barium esophagography had a relatively large @entity5409 . In two @entity1 , whose @entity292 were not detected by sonography or barium esophagography, sonography revealed air bubbles within the @entity5409 , and a @entity50 was suspected. Without requiring ionizing radiation, sonography was thus useful in diagnosing @entity50 -appearing cervical @entity5409 in neonatal cases. On the other hand, in two @entity1 whose @entity292 were not detected by sonography, the shape of the @entity5409 was polygonal or multicystic. In two of three @entity1 with infectious signs, a @entity292 could not be detected. The shape and size of the @entity5409 and the presence of infectious signs may be important factors for detecting @entity292 .
