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Questions and Answers
What percentage of CNS tumors are metastases from other cancers?
What percentage of CNS tumors are metastases from other cancers?
- Between 15% and 25%
- More than 25% (correct)
- Between 10% and 15%
- Less than 10%
Which type of CNS tumor is the second most common cancer in children under 15?
Which type of CNS tumor is the second most common cancer in children under 15?
- Primary CNS tumor (correct)
- Meningioma
- Metastatic CNS tumor
- Glioblastoma multiforme
Which type of astrocytoma has the best prognosis?
Which type of astrocytoma has the best prognosis?
- Grade 1 astrocytoma (correct)
- Grade 2 astrocytoma
- Grade 3 astrocytoma
- Grade 4 astrocytoma
Which type of astrocytoma is the most common form of glioma?
Which type of astrocytoma is the most common form of glioma?
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Which type of astrocytoma may evolve from a lower grade?
Which type of astrocytoma may evolve from a lower grade?
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What is the most aggressive type of astrocytoma?
What is the most aggressive type of astrocytoma?
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What is the characteristic appearance of glioblastoma multiforme?
What is the characteristic appearance of glioblastoma multiforme?
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Study Notes
- Tumors of the CNS can be primary or metastatic.
- More than 25% of CNS tumors are metastases from other cancers.
- Primary CNS tumors are the second most common cancer in children under 15.
- Both benign and malignant tumors can cause neurological impairment.
- Astrocytomas are divided into 4 grades by the WHO classification.
- Grade 1 astrocytoma has a good prognosis and includes juvenile pilocytic astrocytoma.
- Grade 2 astrocytoma is the most common form of glioma.
- Grade 3 astrocytoma is anaplastic and may evolve from a lower grade.
- Grade 4 astrocytoma is the most aggressive and is known as glioblastoma multiforme.
- Glioblastoma multiforme has a variegated appearance and shows areas of tumor necrosis.
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