Types & Subtypes
Oligodendroglioma, IDH-mutant and 1p/19q-codeleted (grade 2)
A grade 2 oligodendroglioma is a slower-growing diffuse glioma defined by IDH mutation and 1p/19q codeletion, with the most favorable outlook among adult diffuse gliomas.
In short: Oligodendroglioma, IDH-mutant and 1p/19q-codeleted (grade 2)
- It is defined by IDH mutation and 1p/19q codeletion.
- It is the lower grade of oligodendroglioma.
- It is slower-growing and often presents with seizures.
- It has the most favorable outlook among adult diffuse gliomas.
What it is
An oligodendroglioma, IDH-mutant and 1p/19q-codeleted, CNS WHO grade 2 is a slower-growing diffuse glioma defined by both an IDH mutation and 1p/19q codeletion. Grade 2 is the lower grade of oligodendroglioma, and these tumors have the most favorable outlook among adult diffuse gliomas.
Understanding Oligodendroglioma, IDH-mutant and 1p/19q-codeleted (grade 2)
This tumor is diagnosed by its two defining molecular features and tends to grow slowly, often over many years. It frequently comes to attention through seizures and may be present for a long time before diagnosis. Among adult diffuse gliomas, oligodendrogliomas generally have the best outlook and respond particularly well to chemotherapy. Treatment is individualized and may involve surgery, observation, chemotherapy (such as PCV), radiation, or — for some grade 2 tumors — newer IDH inhibitor therapy. Although the outlook is relatively favorable, these are still diffuse, infiltrating tumors requiring long-term care, and they can progress over time. Understanding the grade 2 oligodendroglioma clarifies the most favorable adult diffuse glioma and its slower-growing nature.
Why it matters
Understanding the grade 2 oligodendroglioma helps patients and families see the adult diffuse glioma with the most favorable outlook — slower-growing and responsive to treatment — while recognizing it still requires long-term care.
Common questions
What defines a grade 2 oligodendroglioma?
IDH mutation and 1p/19q codeletion, with lower-grade features.
Does it have a good outlook?
It has the most favorable outlook among adult diffuse gliomas.
How is it treated?
Individually — with surgery, observation, chemotherapy, radiation, or IDH inhibitor therapy.
Bottom line
A grade 2 oligodendroglioma is a slower-growing diffuse glioma (IDH-mutant, 1p/19q-codeleted) with the most favorable outlook among adult diffuse gliomas.
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