Surgery A patient presents with heterotopic ossification around the knee joint. The laboratory investigation of choice in him is which of the following? A Serum calcium B Serum Alkaline Phosphatase C Serum phosphorus D Serum Acid phosphatase 💡 Explanation A patient presents with heterotopic ossification around the knee joint. The laboratory investigation of choice in him is which of the following? ✓ Correct Answer: B. Serum Alkaline Phosphatase