Brain and Other Nervous System Standard Histology Groupings*
| Histology | ICDO-3† Histology Code |
|---|---|
| Tumors of Neuroepithelial Tissue | |
| Pilocytic astrocytoma | 9421 |
| Diffuse astrocytoma (protoplasma, fibrillary) | 9410, 9420 |
| Anaplastic astrocytoma | 9401, 9411 |
| Unique astrocytoma variants | 9383, 9384, 9424 |
| Astrocytoma, NOS‡ | 9400 |
| Glioblastoma | 9440, 9441, 9442/3 |
| Oligodendroglioma | 9450 |
| Anaplastic oligodendroglioma | 9451, 9460 |
| Ependymoma/anaplastic ependymoma | 9391–9393 |
| Ependymoma variants | 9394 |
| Mixed glioma | 9382 |
| Glioma malignant, NOS | 9380 |
| Choroid plexus | 9390 |
| Neuroepithelial | 9381, 9423, 9430, 9444 |
| Benign and malignant neuronal/glial, neuronal and mixed | 8680–8682, 8690, 8693, 9412, 9413, 9442/1, 9490–9493, 9500, 9505, 9506, 9522, 9523 |
| Pineal parenchymal | 9360–9362 |
| Embryonal/primitive/medulloblastoma | 8963, 9363, 9364, 9470–9474, 9501–9503, 9508 |
| Tumors of Cranial and Spinal Nerves | |
| Nerve sheath, benign and malignant | 9540, 9541, 9550, 9560, 9561, 9570, 9571 |
| Other tumors of cranial and spinal nerves | 9562 |
| Tumors of Meninges | |
| Meningioma | 9530–9534, 9537–9539 |
| Other mesenchymal, benign and malignant | 8324, 8728, 8800–8806, 8810, 8815, 8824, 8830–8831, 8850, 8851, 8857, 8861, 8890, 8897, 8900, 8910, 8920, 8990, 9040, 9150, 9180, 9210, 9241, 9260, 9480 |
| Hemangioblastoma | 9161, 9535 |
| Lymphomas and Hemopoietic Neoplasms | |
| Lymphoma | 9590, 9591, 9596, 9650–9655, 9659, 9661–9665, 9667, 9670, 9671, 9673, 9675, 9680, 9684, 9687, 9690, 9691, 9695, 9698, 9699, 9701, 9702, 9705, 9714, 9719, 9727–9729, 9731, 9734, 9740, 9741, 9750, 9755–9758, 9827, 9861, 9930 |
| Germ Cell Tumors and Cysts | |
| Germ cell tumors, cysts, and heterotopias | 8020, 9060, 9061, 9064, 9065, 9070–9072, 9080–9085, 9100 |
| Tumors of Sellar Region | |
| Pituitary | 8022, 8040, 8140, 8146, 8246, 8260, 8270–8272, 8280, 8281, 8290, 8300, 8310, 8323, 8333, 8334, 9582 |
| Craniopharyngioma | 9350–9352 |
| Local Extensions from Regional Tumors | |
| Chordoma/chondrosarcoma | 9220, 9231, 9240, 9370–9373 |
| Unclassified Tumors | |
| Hemangioma | 9120–9123, 9125, 9130, 9131, 9133, 9140 |
| Neoplasm, unspecified | 8000–8005, 8010, 8013, 8021 |
| All other | All remaining histologies not listed above |
ICD-O-3 = International Classification of Diseases for Oncology, Third Edition
NOS = not otherwise specified.
*Modified from CBTRUS (2005). Statistical Report: Primary Brain Tumors in the United States, 1998–2002. Published by the Central Brain Tumor Registry of the United States.
Page last reviewed: June 6, 2022