In many instances, observers did not agree about whether the rim and comet-tail signs were present. The rim sign was observed in the absence of any secondary signs of urinary tract obstruction in only one (1.5%) of the 65 patients in our series (95% confidence interval, 0-5.3%). The comet-tail sign, when accompanied by secondary signs of obstruction, should indicate that an ipsilateral ureteral stone is present and not the reverse.
An increased body mass index was associated with greater compressed breast thickness, resulting in increased geometric unsharpness, decreased image contrast, and greater potential for motion unsharpness.
Leiomyomatosis is a rare neoplastic condition of the pediatric esophagus. Presenting symptoms usually overlap with more common esophageal disorders, namely, gastroesophageal reflux. A patient is presented in whom leiomyomatosis progressed to the point of causing cachexia and respiratory compromise.
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