We report a rare case of juvenile cobalamin deficiency who presented at the age of 17 years. He was underweight and had skin changes, normocytic anemia, and autonomic dysfunction, which led to adynamic ileus and acute postrenal failure. The expected macrocytosis was masked by an underlying alpha-thalassemia trait. The patient had an excellent response to parenteral cobalamin treatment.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3302209PMC
http://dx.doi.org/10.1097/MPH.0b013e3182288249DOI Listing

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