Layered neuropathology diagnosisa

Brain (right frontal)
Integrated diagnosis: glioblastoma, IDH-wildtypeb
Histologic diagnosis: diffuse astrocytic tumor with mitotic figures
WHO CNS grade: 4
Molecular information:
 IDH: wildtype (DNA sequencing)
 ATRX: retained nuclear expression, consistent with wild-type (immunohistochemistry)
 p53: rare positive cells, consistent with wild-type (immunohistochemistry)
EGFR: amplified (FISH)
  • a Illustrative example of a layered neuropathology report beginning with site and identifier and with integrated diagnosis as the top line.

  • b Although this tumor lacks microvascular proliferation and necrosis, the presence of EGFR amplification necessitates a diagnosis of glioblastoma in an IDH-wildtype diffuse astrocytic glioma.