A 45-year-old female is admitted to the hospital after worsening headaches for the past month. She has noticed that the headaches are usually generalized, and frequently occur during sleep. She does not have a history of migraines or other types of headaches. Her past medical history is significant for breast cancer, which was diagnosed a year ago and treated with mastectomy. She recovered fully and returned to work shortly thereafter. CT scan of the brain now shows a solitary cortical 5cm mass surrounded by edema in the left hemisphere of the brain at the grey-white matter junction. She is admitted to the hospital for further management. What is the most appropriate next step in management for this patient?
ASeizure prophylaxis and palliative pain therapy
BChemotherapy
CIrradiation to the brain mass
DSurgical resection of the mass
A 13-year-old boy is brought to the physician because of a 4-month history of worsening dizziness, nausea, and feeling clumsy. An MRI of the brain shows a well-demarcated, 4-cm cystic mass in the posterior fossa. The patient undergoes complete surgical resection of the mass. Pathologic examination of the surgical specimen shows parallel bundles of cells with eosinophilic, corkscrew-like processes. Which of the following is the most likely diagnosis?
APinealoma
BMedulloblastoma
CPilocytic astrocytoma
DCraniopharyngioma
EEpendymoma
A 57-year-old man is brought to the emergency department by his wife 20 minutes after having had a seizure. He has had recurrent headaches and dizziness for the past 2 weeks. An MRI of the brain shows multiple, round, well-demarcated lesions in the brain parenchyma at the junction between gray and white matter. This patient's brain lesions are most likely comprised of cells that originate from which of the following organs?
AKidney
BSkin
CLung
DThyroid
EProstate
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