JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
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Feeding problems in cystinosis.

Nephropathic cystinosis, a rare autosomal recessive storage disease characterized by intracellular storage of free cystine due to a defect in lysosomal cystine transport, is the most common cause of Fanconi syndrome in childhood. Although manifestations of extrarenal organ involvement during the course of the disease are diverse, the spectrum of gastrointestinal (GI) problems has not yet been examined. In responses to a questionnaire from 70 (35%) of the 200 registered members of the Cystinosis Foundation, we found that GI symptoms are more common, more diverse, and occur at a younger age in patients with cystinosis than previously recognized. Ninety-three percent of interviewed subjects had GI symptoms at initial presentation, and the overall lifetime prevalence of GI problems in this group was 100%. Thirty percent have received gastric/jejunal tube feedings, and 7% required continuous or intermittent total parenteral nutrition. Fifty percent have been formally tested for GI abnormalities, and among these 77% have documented functional abnormalities (reflux/dysmotility, pseudo-obstruction, swallowing dysfunction). Early recognition and aggressive therapy of GI problems in cystinotic patients may ameliorate or prevent the development of disabling symptoms.

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