Among adolescents and young adults, which cancer is most common?

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This question is about how the prevalence of different brain tumor types changes with age, specifically in adolescents and young adults. In this age range, pituitary tumors (pituitary adenomas) are among the more commonly encountered intracranial neoplasms compared with the other options listed. Medulloblastoma is predominantly a pediatric tumor, so its appearance is less likely in teens and young adults. Meningioma tends to appear more often in older adults rather than adolescents or young adults. Astrocytomas occur across a wide age span, but the pituitary tumors stand out as a relatively common finding in younger individuals among these choices. Pituitary adenomas can present with headaches and visual changes due to optic chiasm compression, and may cause hormonal symptoms depending on their activity.