Understanding Parathyroid Carcinoma and Its Effects on Health

Written by Medicover Team and Medically Reviewed by Dr Prashant Manohar Gaikwad , Endocrinologists

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1. Causes 2. Find a Doctor 3. Diagnosis 4. Treatment 5. FAQs

Parathyroid carcinoma is a rare type of cancer that affects the parathyroid glands. These glands are responsible for regulating calcium levels in the body. When cancer develops in the parathyroid glands, it can disrupt the normal function of these glands.

The exact cause of parathyroid carcinoma is not well understood, but certain genetic factors may play a role in its development. It is important for individuals with a family history of parathyroid carcinoma to speak with their healthcare provider about their risk factors and potential screening options.

What are the Types of Parathyroid Carcinoma?

Parathyroid carcinoma can be broadly described as functional or non-functional based on whether the tumour produces excess parathyroid hormone. Most parathyroid carcinomas are functional and cause hypercalcemia, while non-functional tumours are uncommon and may present primarily because of tumour growth.

Understanding the tumour characteristics and hormone activity helps doctors assess the condition and plan appropriate treatment.

Oxyphil Cell Parathyroid Carcinoma: This rare type primarily involves oxyphil cells within the parathyroid gland and may produce excessive parathyroid hormone, resulting in hypercalcemia.
Clear Cell Parathyroid Carcinoma: This type is characterized by clear cytoplasm in the cancerous cells and may require detailed pathological evaluation to distinguish it from other tumours.
Chief Cell Parathyroid Carcinoma: This carcinoma arises from the chief cells, the predominant hormone-producing cells of the parathyroid glands.

What are the Symptoms of Parathyroid Carcinoma?

Parathyroid carcinoma can cause symptoms such as persistent fatigue, weakness, bone pain, kidney stones, and frequent urination. Patients may also experience abdominal pain, nausea, vomiting, and memory problems. Recognizing these symptoms early is important because parathyroid carcinoma often causes excessive parathyroid hormone production and high calcium levels in the blood.

If you notice these symptoms, consult a healthcare provider for proper evaluation and management. Early detection and treatment are crucial for better outcomes.

Persistent bone pain, especially in the arms, legs, or back, can be a symptom of parathyroid carcinoma, causing discomfort and limiting mobility.
Frequent fractures or bone breaks with minimal trauma may indicate parathyroid carcinoma, leading to weakened bones that are prone to fractures.
Kidney stones that occur frequently and are painful can be a sign of parathyroid carcinoma, as increased levels of calcium in the blood can lead to the formation of stones in the kidneys.
Fatigue and weakness that do not improve with rest could be a symptom of parathyroid carcinoma, as the condition can affect the body's ability to absorb essential nutrients and minerals.

What are the Causes of Parathyroid Carcinoma?

The exact cause of parathyroid carcinoma is unknown, but certain genetic mutations and genetic syndromes like multiple endocrine neoplasia type 1 (MEN1) are believed to play a role in its development. Other factors, such as radiation exposure and familial history, may also contribute to the risk of developing parathyroid carcinoma.

Genetic mutations, such as in the CDC73 gene, can predispose individuals to develop parathyroid carcinoma.
Radiation exposure, particularly to the head and neck region, is a known risk factor for the development of parathyroid carcinoma.
A previous history of benign parathyroid tumors, such as adenomas, may increase the likelihood of developing parathyroid carcinoma.
Chronic renal failure and long-term dialysis treatment can contribute to the development of parathyroid carcinoma.
Certain hereditary conditions, such as multiple endocrine neoplasia type 1 (MEN1) or type 2A (MEN2A), are associated with an increased risk of parathyroid carcinoma.

When to See a Doctor?

Consult an endocrinologist if you experience persistent symptoms related to high calcium levels or unusual changes in your health, as early detection is important.

Ongoing fatigue, weakness, or bone pain
Frequent kidney stones or excessive urination
Abdominal discomfort, nausea, or memory issues

Get medical help immediately if:

Severe confusion or sudden changes in mental state
Persistent vomiting or signs of dehydration
Severe pain or rapidly worsening symptoms

These could indicate serious complications related to Parathyroid Carcinoma and require urgent care.

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How Is Parathyroid Carcinoma Diagnosed?

Diagnosis usually begins with blood tests to identify high calcium and parathyroid hormone levels, followed by imaging studies to locate the abnormal gland and assess whether the tumour has spread to nearby tissues. A thorough clinical evaluation is important because the findings can help distinguish parathyroid carcinoma from more common benign parathyroid conditions.

Symptoms like bone pain, kidney stones, or fatigue can prompt further testing. Early detection is key to better treatment outcomes. Consult your doctor if you experience persistent symptoms for proper evaluation and diagnosis.

Imaging studies such as ultrasound, CT scans, and MRI can help identify abnormalities in the parathyroid gland that may indicate parathyroid carcinoma.
Blood tests to measure levels of calcium, parathyroid hormone (PTH), and other markers can provide valuable information in diagnosing parathyroid carcinoma.
A sestamibi scan, also known as a parathyroid scan, can help locate overactive or malignant parathyroid tissue in the neck region.
Fine needle aspiration biopsy may be performed in selected cases, although biopsy of a suspected parathyroid tumour is generally avoided when possible because it can complicate definitive surgical management.

What are the Treatment Options for Parathyroid Carcinoma?

Treatment for parathyroid carcinoma depends on whether the tumour can be completely removed, whether it has spread, and the severity of associated hypercalcemia. Surgery is the main potentially curative treatment, while medicines and other therapies may be used to control calcium levels or manage recurrent or advanced disease.

Your healthcare team will determine the most appropriate treatment plan based on the stage and extent of the disease. It's important to discuss all available options and potential side effects with your medical team.

Surgery is the primary treatment for parathyroid carcinoma, aiming to remove the affected parathyroid gland and tumour along with adjacent tissues when necessary to achieve complete tumour removal.
Radiation therapy may be considered in selected cases, particularly when there is residual disease or a high risk of local recurrence.
Medications that lower calcium levels may be used to manage hypercalcemia, particularly when surgery is not immediately possible or the disease has recurred.
Systemic therapies may be considered for advanced or recurrent disease when surgery and local treatments are not sufficient.

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What are the Risk Factors of Parathyroid Carcinoma?

Parathyroid carcinoma risk factors include a history of radiation exposure to the head and neck region, certain genetic syndromes such as multiple endocrine neoplasia type 1, and a family history of parathyroid cancer. Certain inherited genetic mutations can also predispose individuals to developing this rare cancer.

Recognizing these risk factors can help healthcare providers determine whether genetic counselling or closer clinical evaluation may be appropriate.

Genetic syndromes such as multiple endocrine neoplasia type 1 (MEN1) increase the risk of developing parathyroid carcinoma.
Radiation exposure to the head and neck region is a known risk factor for the development of parathyroid carcinoma.
Chronic kidney disease and long-term dialysis treatment can elevate the risk of parathyroid carcinoma.
A previous history of benign parathyroid tumors, also known as adenomas, may increase the likelihood of developing parathyroid carcinoma.
Age above 50 years is considered a risk factor for parathyroid carcinoma, with incidence rates rising with advancing age.

Frequently Asked Questions

1. Are there specific signs that indicate parathyroid carcinoma?

Signs of parathyroid carcinoma include a painless neck mass, hoarseness, difficulty swallowing, and high levels of calcium in the blood.

2. What precautions should be taken for parathyroid carcinoma?

Regular follow-ups, imaging studies, and blood tests are important. Surgery is the main treatment; radiation or chemotherapy may be needed in advanced cases.

3. What are the potential complications of parathyroid carcinoma?

Parathyroid carcinoma can lead to hypercalcemia, weakening bones, kidney stones, and other organ damage due to excess production of parathyroid hormone.