9. Test Laboratorio The important message in the report by Va¨lima¨ki and Ta¨htela¨ is not which marker is better in specific circumstances. Instead, the clear message from this and several other sources is that biochemical markers of bone turnover/remodeling are very effective tools for monitoring the effectiveness of antiresorptive therapy in individual patients as well as in groups of patients. Va¨lima¨ki MJ, Ta¨htela¨ R. Serum tartrate-resistant acid phosphatase 5B or amino-terminal propeptide of type I procollagen for monitoring bisphosphonate therapy in postmenopausal osteoporosis? Clin Chem 2005;51: 2382–5. PINP Fosfatasi Acida Tartrato Resistente