Unfortunately, in patient 6, sequencing of GALNS gene has not revealed any mutation (and the parents have not agreed for further testing to check for, i.e., indels), so the only proposed correlation as regards height was for c.121-9T>G(;)680delT mutations, resulting in our group in mild MPSIVA (Table 1). The gene discussed is GALNS; the disease is mucopolysaccharidosis type 4A.