PNET (Primitive Neuroectodermal Tumor)
   Rare family of tumors. Provides information about symtoms, diagnosis, and treatment.
   http://www.cinn.org/tumor/diagnoses/pnet-tumor.html

eMedicine: Primitive Neuroectodermal Tumors of the Central Nervous System
   Article by Subrata Ghosh, MD describing the disease, statistics, treatment, lab studies, medication, images, and bibliography links.
   http://www.emedicine.com/neuro/topic326.htm