An Intracranial Mass Is Removed from a 33-Year-Old Patient

An intracranial mass is removed from a 33-year-old patient.  The mass is composed of cells that have elongated, wavy nuclei.  A biphasic pattern of growth is identified, consisting of areas of dense cellularity interspersed with less dense myxoid regions.  The cells show diffuse S-100 immunoreactivity.  Which of the following is the most likely diagnosis?

A) Glioblastoma
B) Meningioma
C) Metastatic lung adenocarcinoma
D) Optic glioma
E) Schwannoma

Correct Answer:

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