Olfactory neuroblastoma is not a neuroblastoma but is related to primitive neuroectodermal tumor (PNET).

@article{Cavazzana1988OlfactoryNI,
  title={Olfactory neuroblastoma is not a neuroblastoma but is related to primitive neuroectodermal tumor (PNET).},
  author={A O Cavazzana and S{\'e}bastien Navarro and Rosa Noguera and Paul C. Reynolds and Timothy Triche},
  journal={Progress in clinical and biological research},
  year={1988},
  volume={271},
  pages={463-73}
}