Question: How many people are affected by thiamine-responsive megaloblastic anemia syndrome ?
Answer: Thiamine-responsive megaloblastic anemia syndrome has been reported in approximately 30 families worldwide. Its prevalence is unknown.
Source: GHR

Question: Is thiamine-responsive megaloblastic anemia syndrome inherited ?
Answer: This condition is inherited in an autosomal recessive pattern, which means both copies of the gene in each cell have mutations. The parents of an individual with an autosomal recessive condition each carry one copy of the mutated gene, but they typically do not show signs and symptoms of the condition.
Source: GHR