Central hypothyroidism
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The Correct Answer is D
Explanation:
This patient has central hypothyroidism and should be evaluated for pituitary and end-organ function as well as the presence of a pituitary tumor. The prolactin level should be measured and the pituitary-adrenal, gonadal, and growth hormone axes assessed. The presence of a pituitary tumor can be determined by imaging the pituitary gland with MRI or CT scan. Where appropriate, this should be followed by evaluation of the visual fields. Measurement of the α subunit, a glycoprotein shared by FSH, LH, and TSH, may also be useful because some pituitary tumors secrete only this peptide.
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