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cystinosis

(sĭs′tə-nōsĭs)
n.
  1. A hereditary dysfunction of the renal tubules characterized by the presence of carbohydrates and amino acids in the urine, excessive urination, and low blood levels of potassium ions and phosphates, and caused by the abnormal metabolism of cystine and the accumulation of cystine crystals in tissues; it occurs in young children.cystine storage disease
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.