All of the following are true of hypothyroidism, except:

Correct Answer: C

Rationale: Hypothyroidism is more common in women; the other statements are accurate reflections of its presentation and effects.

Correct Answer: D

Rationale: Cushing's disease causes proximal muscle weakness (e.g., quadriceps) from cortisol-induced catabolism.

Correct Answer: D

Rationale: Multiple myeloma causes hypercalcemia without hypercalciuria, as calcium is bound to paraproteins.

Correct Answer: B

Rationale: Myxedema causes low voltage and flattened T-waves due to pericardial effusion and reduced cardiac activity.

Correct Answer: D

Rationale: Insulinomas (islet cell tumors) cause hypoglycemia, leading to fatigue, hunger, and sweating.