MFSD2A and microcephaly: Only one single type of microcephaly out of the 25 identified, i.e., MCPH15 or MFSD2A (major facilitator superfamily domain containing 2A) [9], is associated with a mutation in a protein with a genuine neural-related function, i.e., a mutation in a transporter of lysophosphatidylcholine across the blood/brain barrier, which is directly required for proper brain growth.