C-Telopeptide (CTx) details
What C-Telopeptide (CTx) shows
Bone is constantly being broken down and rebuilt. C-telopeptide, or CTx, is a fragment of type I collagen, the main protein in bone, that is released into the blood when bone is broken down. It is measured to help look at the rate of bone resorption, and most often to monitor how well treatment for osteoporosis is working. Higher levels point to faster bone breakdown, which can occur after menopause, with some bone diseases and with recent fractures, while lower levels are expected on treatment. CTx varies through the day and with eating, so a fasting morning sample is usually used, and it does not diagnose osteoporosis.
Tests that include C-Telopeptide (CTx)
CTx is useful to assess bone resorption in patients with metabolic bone disease. The test is also useful in monitoring therapy to slow or halt osteoporotic bone loss.
- C-Telopeptide (CTx) Measures C-telopeptide (CTx), a fragment released when bone is broken down, used to help look at bone turnover and monitor osteoporosis treatment.
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