Final answer:
The classification of adult type diffuse gliomas is based on the World Health Organization (WHO) grading system. Adult diffuse gliomas are categorized into four major subtypes: diffuse astrocytic and oligoastrocytic tumors, diffuse astrocytoma, anaplastic astrocytoma, and glioblastoma. Each subtype has distinct characteristics and treatment options.
Step-by-step explanation:
The classification of adult type diffuse gliomas is based on the World Health Organization (WHO) grading system.
The WHO classifies adult diffuse gliomas into four major subtypes, which are:
- Diffuse astrocytic and oligoastrocytic tumors: These include astrocytoma, oligodendroglioma, and oligoastrocytoma.
- Diffuse astrocytoma: This subtype includes low-grade astrocytomas, such as grade II.
- Anaplastic astrocytoma: This subtype includes grade III astrocytomas, which are more aggressive.
- Glioblastoma: This is the most aggressive and malignant subtype, which is classified as grade IV.
Each subtype is characterized by different cellular and molecular features, as well as different prognosis and treatment options.