- Expression of the neurotrophin receptor p75NTR in medulloblastomas is correlated with distinct histological and clinical features: evidence for a medulloblastoma subtype derived from the external granule cell layer. Bühren, J., Christoph, A.H., Buslei, R., Albrecht, S., Wiestler, O.D., Pietsch, T. J. Neuropathol. Exp. Neurol. (2000)