Thyroid Cancer

What Is Thyroid Cancer

Thyroid

The Thyroid gland is about 2 inch long, butterfly shaped organ located on the front side of the throat. It is one of the largest endocrine glands.

Functions

The Thyroid gland synthesizes two vital hormones : triiodothyronine and thyroxine which are responsible for regulating body’s temperature, heartbeat, metabolism, growth, appetite, menstrual cycle etc.

Thyroid Cancer

Thyroid Cancer is a type of tumor located within the thyroid gland which may be in the benign or malignant state.  Four types of Thyroid Cancer could be differentiated till date – Papillary, Follicular, Medullary and Anaplastic Thyroid Cancer.

Types of Thyroid Cancer

Papillary Cancer
It accounts for 80% of the thyroid cancer occurrences. It grows slowly and spreads gradually over different parts.  It can often be treated successfully and are rarely fatal.
Follicular Cancer
This cancer is mostly caused due to lack of Iodine in the diet.It accounts for 10% of the total thyroid cancer occurrences. They usually do not spread to the lymph nodes but they can spread to other parts of the body.  The prognosis of follicular cancer is good but the rates are lower than papillary cancer.
Medullary Cancer
It accounts for 4% of thyroid cancers. This type of thyroid cancer is more difficult to find and treat.  It can be further classified as:
Anaplastic Thyroid Cancer
This is a rare form of thyroid cancer, amounting up to 2% of all thyroid cancers. This cancer is referred as undifferentiated. It often spreads quickly into the neck and to other parts of the body, and is difficult to treat.

Occurrences of Thyroid Cancer

Thyroid Cancer is a type of tumor located within the thyroid gland which may be in the benign or malignant state.  Four types of Thyroid Cancer could be differentiated till date – Papillary, Follicular, Medullary and Anaplastic Thyroid Cancer.
Type Occurrence Rate
Papillary Cancer 80%
Follicular Cancer 15%
Medullary Cancer 3%
Anaplastic  cancer 2%

Thyroid Cancer is a common cancer type and its diagnosis tends to scare the patients, however most cases of Thyroid Cancers are highly treatable and can be cured with surgery and other advanced treatments.

Anatomy Of Adrenal Cancer

Anatomy of thyroid gland
Anatomy of Thyroid Cancer

What Are The General Symptoms Of Thyroid Cancer?

The symptoms of thyroid cancer vary from person to person. Some people may not experience any symptom till the later stages until the physician diagnose the lump in the neck during routine health examination while some may experience prominent early symptoms. The most common symptoms of thyroid cancer are as

What Are The General Causes Of Adrenal Cancer?

There are various causes which contribute towards the increased risk of developing Thyroid Cancer. Some of them are given below:

Can Thyroid Cancer Be Prevented?

Most cases of Thyroid Cancer cannot be prevented. However in some cases, certain preventive measures can reduce the risk of developing Thyroid Cancer to a great extent. Some of those measures are outlined below:
By avoiding exposure to radiation

The cells of the Thyroid gland (and most other glands) are very sensitive to x-rays and other forms of radiation, and easily destroyed or mutated if exposed to it. If you are advised a CT scan by your healthcare professional for any underlying illness , consult with your physician for any other alternative measures like MRI etc since the amount of radiation emitted by CT SCAN is 50 times greater than that of the radiation emitted by MRI or X- rays.

Radiation exposure especially in children increases the risk of Thyroid Cancer. Imaging tests such as x-rays and CT scans also expose children to radiation, but at much lower doses. The exact measure of exposure that might raise the risk of Thyroid Cancer is yet not clear.

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Avoid residing near a nuclear power plant

The surroundings or neighbouring areas should be thoroughly scrutinized while selecting the place of residence. It is advised to select a place that is located at least 10 miles away from the resident area.

If an individual is residing in a place which is near to any nuclear power plant then extreme preventive measures should be taken in case of nuclear fallout. A suitable dosage of potassium iodide needs to be administered to those individuals who are residing in places of nuclear emergency.

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Maintaining proper level of Iodine

The Thyroid gland needs a steady supply of iodine to function properly and to synthesize its hormones.

Iodine deficiency causes the Thyroid gland to swell initially causing goiter, but chronic deficiency promotes nodules and highly increases the risk of Cancer. Iodine can be consumed through common salt or through fish / shellfish.

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Blood tests for gene mutations

If an individual have familial history of Thyroid Cancer, then it is highly recommended to opt for a blood test. A gene mutation can predominantly cause familial medullary Thyroid Cancer (MTC).

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Regular Thyroid Screenings

Most of the Thyroid Cancer cases can be found in the early stages. Oncologists recommend self examination of the neck area at least twice a year and a medical screening once a year.

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Special precautions during child bearing age

Gender or age cannot be prevented but we can be a bit more vigilant with self exams and screenings. Women are 3x more likely than men to develop Thyroid Cancer and about 65% of cases occur during childbearing years (20-45 years).

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What Are The Stages Of Thyroid Cancer?

Usually Thyroid Cancers are staged on the basis of TNM staging systems. Here are listed the number staging systems which doctor uses for Cancer staging.

T indicates the size of the main (primary) tumor and whether it has grown into nearby areas.

N: N denotes regional lymph nodes. Numerous lymph nodes are located in the region of head and neck. These can be further classified into N0 and N1.

M: Here M denotes distant metastasis which means that the Cancer has spread to the distant tissues and organs.

Survival Rates Of Thyroid Cancer?

It is difficult to estimate the exact survival rate of patient as the survival rates of patients suffering from Thyroid Cancer can vary from one individual to another. Here are outlined the survival analysis of 5 years study of patients who were victims of different branches of Thyroid Cancer.

Cancer stats at a glance
Papillary Thyroid Cancer

Based on patients diagnosed 1998 to 1999
Stage5-Year Relative Survival Rate
Inear 100%
IInear 100%
III93%
IV51%
Follicular Thyroid Cancer

Based on patients diagnosed 1998 to 1999
Stage5-Year Relative Survival Rate
Inear 100%
IInear 100%
III71%
IV50%
Medullary Thyroid Cancer
Stage5-Year Relative Survival Rate
Inear 100%
II90%
III71%
IV21%
Based on patients diagnosed between 1985 and 1991

Can Thyroid Cancer Be Detected Early?

It comes to a relief, as most Thyroid Cancers can be detected early due to their prominent symptoms, like neck lumps or nodules. Early Thyroid Cancers are also sometimes diagnosed during ultrasound tests or blood tests. However, to be sure proper tests and diagnostics are essential also a few people may not experience the signs and symptoms at the early stages. Some of the investigation and diagnostic test which your doctor may advice to detect the TNM stages of Thyroid Cancer are as follows.

What Are The Treatments Available For Thyroid Cancer?

There are several treatment options which are alone or in combination implemented to treat Thyroid Cancer depending the severity of the disease. They include
Surgery
There are three types of standard surgical procedures which are used to remove the tumor surgically. They include lobectomy surgical procedure which removes the Thyroid Cancer induced lobe, Thyroidectomy which involves the partial or total removal of the whole Thyroid gland.
Radiation Therapy
Following surgery radiation therapy is implemented to prevent episodes of reoccurrence of Cancer cells. There are types of standard radiation therapy – the external as well as the internal radiation therapy. The former is the one in which a machine is used externally to kill the timorous growth while the latter implies the administration of radioactive substance internally which may be either incorporated in wires or needles. The radiation oncologist decides which therapy is required for a particular individual depending on the stage of the tumor.
Chemotherapy
Chemotherapy is administered either before or after surgical procedure to shrink the tumor size and to prevent it from spreading to nearby organs. Chemotherapy is given either through oral or intravenous route depending upon the severity of the disease.
Hormone Therapy
Hormonal therapy is usually given orally which stops the Cancer from growing by blocking the action of certain hormones required for the survival of tumor cells.
Targeted Therapies
These innovative new drugs stop the growth of Cancer cells by interfering with certain proteins and receptors or blood vessels that supply the tumor with what it needs to grow. Targeted drugs treat Throat Cancer by taking advantage of specific defects in Cancer cells that fuel the cells’ growth. These drugs can be used in combination with chemotherapy or radiation therapy.
Is There Any Curative Treatment For Thyroid Cancer?

If the Cancer is detected in its early stage then proper measures can be taken to reverse it, extending the survival of the patient. However, for later stage diagnosis the treatment involves only conservative measures where palliative medicine aids in relieving the symptoms associated with it.

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How Frequently Should One Visit Doctor For Early Diagnosis?

It is recommended that you perform TSH test at least once in six months. However if you notice any kind of symptoms associated with Thyroid Cancer, it is recommended to consult with your healthcare professional at the earliest.

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How Can I As A Patient Know It Early?

Keep yourself updated with the symptoms as well the risk factors associated with this disease so that once something fishy is going on within your organs, seek medical help at the earliest.

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