BDNF and myeloid sarcoma: Reports on the effects of neonatal stress on BDNF are conflicting, as both increased (Roceri et al., 2004) and decreased BDNF mRNA expression (Kuma et al., 2004) have been observed in MS-exposed infants, and either similar BDNF mRNA (Roceri et al., 2004; Greisen et al., 2005) accompanied by increased BDNF protein levels (Greisen et al., 2005), decreased BDNF mRNA (Aisa et al., 2009), or increased BDNF mRNA levels (Kuma et al., 2004) have been observed in MS adults.