Reccurent Headaches in a 31-yr-old Woman

Results of appropriate testing return and show the following:

Cerebrospinal fluid (CSF) analysis:

Test (units)	Result	Ref. Range
Color	Clear
Opening pressure	Opening pressure: 110 mm H20
RBCs	2/mL	2000/L
Protein	30 mg/dL	0.3 g/L
Glucose	50 mg/dL	2.8 mmol/L
Plasma free metanephrines	100 nmol/L (normal < 0.50 nmol/L)	N/A
Plasma free normetanephrines	180 nmol/L (normal < 0.90 nmol/L)	N/A

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