High Calcitonin: what it means
A Calcitonin result above the normal range is considered high. Here is what a raised Calcitonin can point to, and when it is worth discussing with a doctor.
Reference range: typically <10 ng/L; a hormone from thyroid C-cells — a high level is a marker of medullary thyroid cancer
Understand your full resultWhat a high Calcitonin can mean
- Medullary thyroid cancer — the key concern; a clearly raised level, especially with a thyroid nodule, points toward this cancer.
- A rising level after treatment — suggests the cancer may have recurred; used for monitoring.
- Inherited (MEN2) forms — relevant when screening gene-carrying family members.
- Non-cancer causes of a mild rise — kidney impairment, certain medications (e.g. proton-pump inhibitors), smoking — so a modest elevation is interpreted with care.
When to discuss with a doctor
Calcitonin is a specialist test rather than a routine one, used mainly around medullary thyroid cancer. It may be checked when a thyroid nodule is being assessed, and it is central to monitoring after treatment of a confirmed medullary thyroid cancer, where the trend over time is what matters — a stable low level is reassuring, a rising level prompts further imaging. It is also used to screen relatives in families with the inherited (MEN2) form. Because a modest rise can have non-cancer causes, a borderline result is interpreted carefully and usually rechecked rather than taken at face value. This needs specialist assessment by endocrinology. Mediora.AI surfaces a calcitonin result alongside the related thyroid markers so the pattern is visible; the interpretation and any next steps belong with your specialist team.
Conditions this can relate to
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Upload your test - freeMediora.AI is informational - interpretation, not a diagnosis. A single out-of-range value is common and often benign; always discuss decisions with your doctor.