Did you know your thyroid produces a hormone that helps keep your bones strong and your blood calcium in check? That hormone is calcitonin, which is often overlooked but vital. While it does not directly cause diseases, abnormal levels can be an early warning sign of thyroid cancer or endocrine disorders.
So, could your hormone levels be telling you more than you think? Let us read the details below to know more.
Following are the diseases you can get with abnormal calcitonin levels in your body:
Medullary thyroid cancer is a rare but aggressive form of thyroid cancer that originates in the C-cells. These cancerous cells release excessive amounts of calcitonin, which can be detected through blood tests. Early diagnosis is crucial, as MTC can spread to lymph nodes and other organs.
Symptoms may include:
C-cell hyperplasia is a non-cancerous overgrowth of the C-cells in the thyroid gland. Although benign, this condition can precede or coexist with medullary thyroid cancer, particularly in individuals with a genetic predisposition, such as those with Multiple Endocrine Neoplasia Type 2 (MEN 2).
Monitoring of calcitonin levels is vital in such individuals to detect malignant changes early.
Calcitonin levels may vary based on gender and laboratory reference ranges. In general:
It is important to note that values may differ slightly depending on the laboratory and testing methods used. Therefore, one should always refer to the specific reference range mentioned in the test report.
Low calcitonin levels are not generally associated with any health concerns. Individuals who have undergone a thyroidectomy (removal of the thyroid gland) often have undetectable calcitonin levels, yet maintain normal blood calcium balance through the actions of other hormones such as parathyroid hormone (PTH) and vitamin D.
While calcitonin abnormalities may not cause direct symptoms, certain clinical signs and genetic predispositions necessitate testing. These include:
Symptoms of medullary thyroid cancer or C-cell hyperplasia, such as:
Signs of Multiple Endocrine Neoplasia Type 2 (MEN 2), including:
Individuals with a family history of MEN 2 or medullary thyroid cancer are at higher genetic risk and should undergo routine screening and genetic counselling. Genetic testing for RET proto-oncogene mutations may also be advised.
A simple blood test measures calcitonin levels. It is usually recommended when:
The procedure carries minimal risk, and any discomfort from the blood draw typically resolves quickly.
Calcitonin is not harmful in itself but can indicate serious conditions like medullary thyroid cancer or C-cell hyperplasia. While low levels pose little concern, high levels need medical evaluation. Individuals with symptoms or a family history of endocrine disorders should seek timely testing, as early detection significantly improves outcomes.