A 35-year-old woman is evaluated for seizure disorder, mental obtundation, and personality change. Physical examination is normal. Fasting serum glucose is 44 mg/dL. Other serum values are normal. Subsequent investigations should include which of the following?
A.	Oral glucose tolerance test
B.	Determination of fasting insulin/glucose ratios
C.	Assay of serum C-peptide levels
D.	Determination of serum prolactin levels
Answer:B
A 35-year-old woman is evaluated for seizure disorder, mental obtundation, and personality change. Physical examination is normal. Fasting serum glucose is 44 mg/dL. Other serum values are normal. Subsequent investigations should include which of the following?
A.	Oral glucose tolerance test B.	Determination of fasting insulin/glucose ratios C.	Assay of serum C-peptide levels D.	Determination of serum prolactin levels