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Volume 354:1433-1434 March 30, 2006 Number 13
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Medical Mystery: Concentric Calcification — The Answer

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by Kim, D. H. D.
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To the Editor: The patient in the medical mystery in the February 2 issue1 had encrusted pyeloureteritis and cystitis caused by Corynebacterium urealyticum. Multiple urine cultures revealed the presence of corynebacterium species that were subsequently shown to be C. urealyticum. The clues to the correct diagnosis were the results of multiple urinalyses that showed persistently alkaline urine and the presence of triple phosphate crystals and concentric calcification of the ureters as seen on computed tomographic scanning of the pelvis. In addition, the "contaminants" in the urine were presumed to have been diphtheroids (common skin flora) but were actually C. . . . [Full Text of this Article]



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