A 3-year-old boy is brought to the emergency department after several
episodes of vomiting and lethargy. His pediatrician has been concerned about
his failure to thrive and possible hepatic failure along with recurrent episodes
of the vomiting and lethargy. After a careful history is taken, you observe that
these episodes occur after ingestion of certain types of food, especially high in
fructose. His blood sugar was checked in the emergency department and was
What is the most likely diagnosis?
What is the biochemical basis for the clinical symptoms?
What is the treatment of the disorder?