<prompt> Causes of macrocephaly include all of the following exceptRicketsNeuro fibromatosisCanavan diseaseCongenital CMV  <response>: Causes of macrocephaly Increase in skull vault thickness Chronic anemia Rickets Osteogenesis imperfecta Osteopetrosis Storage in brain Tay sachs disease Maple syrup urine disease Leukodystrophy Neurofibromatosis 