Which is the diagnosis of the patient pictured in Figure 31-3?

Correct Answer: B

Rationale: Osteogenesis imperfecta type I is common and milder, likely depicted in Figure 31-3 with features like blue sclerae or fractures.

Correct Answer: A

Rationale: Cirrhosis causes hypervolemic hyponatremia due to fluid retention and dilution of serum sodium from portal hypertension and impaired water excretion.

Correct Answer: C

Rationale: Thrombocytosis causes pseudohyperkalemia by releasing potassium from platelets during clotting in vitro, not reflecting true serum levels.

Correct Answer: D

Rationale: Hypermagnesemia causes hypotension, not hypertension, due to smooth muscle relaxation and reduced vascular tone.

Correct Answer: C

Rationale: A calcium-phosphorus product >70 mg²/dL² risks systemic calcification, especially in renal disease.