Which of the following tumour is associated with raised serum alkaline phosphatase levels?: (A) Osteoclastoma, (B) Osteosarcoma, (C) Multiple myeloma, (D) Chondrosarcoma
Answer is B. Serum alkaline phosphatase (SAP) It is generally elevated, but is of no diagnostic significance. It has been considered a useful parameter for follow up of a case of osteosarcoma. A rise of SAP after an initial fall after tumour removal is taken as an indicator of recurrence or metastasis. Reference: Maheshwari; Essential Ohopaedics; Page no: 240