cancer
 |__organ system cancer_______
disease of anatomical entity  |
 |__nervous system disease____|
                              nervous system cancer  551 rec.
                               |__central nervous system cancer 532 rec.
                               |   |__adult central nervous system choriocarcinoma
                               |   |__brain cancer(+) 474 rec.
                               |   |__central nervous system germ cell tumor(+)
                               |   |__central nervous system hematologic cancer(+)
                               |   |__central nervous system melanocytic neoplasm(+)
                               |   |__central nervous system mesenchymal non-meningothelial tumor(+)
                               |   |__central nervous system rhabdomyosarcoma
                               |   |__central nervous system sarcoma(+)
                               |   |__cranial nerve malignant neoplasm(+)
                               |   |__malignant astrocytoma(+) 27 rec.
                               |   |__meningioma(+)
                               |   |__spinal cancer(+)
                               |__neuroectodermal tumor
                               |   |__spinal cord primitive neuroectodermal neoplasm(+)
                               |__peripheral nervous system neoplasm 20 rec.
                               |   |__autonomic nervous system neoplasm(+) 20 rec.
                               |   |__cranial nerve malignant neoplasm(+)
                               |   |__malignant melanocytic peripheral nerve sheath tumor of mediastinum
                               |   |__nerve plexus neoplasm(+)
                               |   |__nerve root neoplasm
                               |   |__peripheral nerve sheath neoplasm(+)
                               |__sensory system cancer 2 rec.
                                   |__auditory system cancer(+)
                                   |__ocular cancer(+) 2 rec.