The following are clinical manifestations of nontoxic goiter (hypothyroidism)

The following are clinical manifestations of nontoxic goiter (hypothyroidism), EXCEPT:
A.    dry skin
B.    lethargy
C.    insomnia
D.    sensitivity to cold

The correct answer is C. Hypothyroidism causes a decrease in thyroid hormones, which in turn causes decreased metabolism. Options A, B and D are all consistent with decreased metabolism. Option C is a symptom of increased metabolism found in hyperthyroidism.

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