Pentosuria, also known as xylitol dehydrogenase deficiency, is related to alkaptonuria and neuromuscular disease. An important gene associated with Pentosuria is DCXR (Dicarbonyl And L-Xylulose Reductase), and among its related pathways/superpathways are Metabolism and Regulation of expression of SLITs and ROBOs. Affiliated tissues include liver, and related phenotypes are abnormality of circulating enzyme level and abnormal urine carbohydrate level