ENDOCRINOLOGY

THYROID DISEASES What is the thyroid and what is its function?

The secretory gland called thyroid is a small butterfly-shaped gland located on the lower part of the cartilage called Adam's apple and situated on the middle axis of the throat. Playing a very important role in the balanced functioning of the body, the thyroid synthesizes the hormones that are needed for the proper functioning of many organ systems. Sufficient intake of iodine is necessary to ensure the proper synthesis of thyroid hormones. According to guides, yearly incidence of hypothyroidism is 3,5 in 1000 in women, and 0,6 in men. Thyroid diseases may be caused by many things such as autoimmune diseases, infections, inflammation, benign / malign masses, etc.

What is hypothyroidism?

Hypothyroidism is a disease characterized by metabolic retardation caused by a deficit or, rarely, an inactivity of the thyroid hormone at tissue level. In people who suffer from the disease, thyroid stimulating hormone levels (TSH) among thyroid hormones increase.

What is hyperthyroidism?

Hyperthyroidism indicates the excess of thyroid hormone caused by increased hormone synthesis of the thyroid gland. The most common cause of hyperthyroidism, Graves' disease is diagnosed each year in 25 per 100,000 people. In hyperthyroidism, thyroid stimulating hormone levels are low, and sometimes they cannot even be determined, while T4 and T3 levels have increased.

What are the types of hypothyroidism or hyperthyroidism?

Both hypothyroidism and hyperthyroidism can be divided into two as overt and subclinical (showing no symptoms or showing few symptoms) based on blood hormone levels (TSH, T4 and T3).

What are the symptoms of hypothyroidism?

Symptoms caused by a deficient activity of the thyroid gland include getting tired quickly, sensitivity to cold, weight gain, constipation, changes in the voice, edema on the eyelid, dryness of skin, paleness, low pulse, loss of strength, attention deficit, irregular menstruation in women, etc.

What are the symptoms of hyperthyroidism?

Symptoms caused by an overactive thyroid gland are hand tremor, weight loss, diarrhea, intolerance to heat, perspiration, hair loss, restlessness, fear, sleep disorders, swallowing difficulties, high pulse, palpitations etc.

How is hypothyroidism or hyperthyroidism diagnosed and which tests are conducted?

After your doctor has analyzed your medical history and examined you, they may ask for additional blood tests, ultrasonography, and if needed, more advanced tests such as thyroid scintigraphy and thyroid biopsy to determine the state of your thyroid glands.

What are treatment methods in hypo and hyperthyroidism?

In both diseases, treatment should be chosen based on the underlying cause. Pharmacological treatment, radioactive iodine therapy or surgical intervention may be chosen. Pharmacological treatment consists in the adjustment of thyroid functions, in other words, of metabolism, by replacing the deficient hormone and suppressing the excessive one. The patient should be monitored regularly with blood tests and other appropriate methods. Duration of treatment should be determined based on the underlying cause.

Is non-pharmacological treatment possible in hypothyroidism or hyperthyroidism?

Again, based on the underlying cause, some patients may undergo non-pharmacological treatments such as surgical interventions and radioactive iodine therapy.

Which medications are used in the treatment of hypothyroidism and hyperthyroidism?

Thyroid hormone preparations, analgesics and anti-inflammatory medications, beta blockers and sometimes, preparations containing iodine can be used according to the underlying cause of an excessive or insufficient activity of the thyroid gland.

DIABETES What is diabetes and how does it develop?

Believed to be playing a role in the development of many mechanisms, diabetes can be described as the "deficiency or inactivity of the insulin hormone" secreted by the pancreatic gland. It usually brings with it lipid (fat) metabolism disorders.

Is diabetes frequent?

Characterized as a disorder of carbohydrates metabolism, diabetes is prevalent far beyond expectations both in Turkey and globally and is increasing by the day. In a recently published study, prevalence ratio of diabetes has been found to be around 14%.

What is insulin?

Insulin is an indispensable hormone necessary for the glucose (sugar) molecules in the blood to be used properly by the cells. Therefore, its deficiency or inactivity results in blood sugar levels rising above accepted limits. This excess of blood sugar may affect all the organs in the body with time.

How many types of diabetes are there?

Diabetes is divided into two. Type 1 diabetes occurs when there is a deficit of insulin caused by a destruction of pancreatic cells which synthesize insulin hormone. The destruction may be caused by infectious diseases, radiation and exposure to some chemical substances etc. It is mostly seen in children and adolescents. There is no family history of the disease. Treatment consists in replacing the insulin that is deficient. Approximately 5-10% of diabetes patients have this type of diabetes. The remaining 90-95% suffer from Type 2 diabetes characterized by a decrease of insulin and / or a change in the body's response to insulin. This second type usually presents after ages 35-40. It may also be seen in other members of the family.

What are the symptoms of diabetes?

Although standard symptoms of Type 2 diabetes include dryness of the mouth, overeating / excessive drinking of water, fatigue and listlessness, some patients may enter a coma as first symptom.

What happens if diabetes is not taken under control?

Diabetes results in two significant phenomena.

Suddenly developing cases

These are cases that we can describe as hypoglycemia and diabetic coma.

Problems developing in the long term

Diabetes that goes uncontrolled may cause hyperglycemia (high levels of blood sugar) and may subsequently cause complications that affect all the systems of the body including first and foremost the cardiovascular system, the eyes, the kidneys, the nervous system (cases such as diabetic neuropathy, etc.). Furthermore, individuals with diabetes are more likely to develop infections compared with individuals who do not suffer from diabetes. Existing data indicate that the incidence and mortality of cardiovascular diseases in individuals with diabetes is 2-8 times higher than in individuals who do not suffer from it. Globally, the most prevalent cause of renal failure and of non-traumatic foot/leg amputation (surgical removal) cases is diabetes. Particularly in developed countries, diabetes is one of the causes of vision loss and blindness.

How is diabetes diagnosed?

Diagnosis is made with laboratory methods. It is made possible through preprandial and postprandial blood tests and glucose tolerance tests.

Which tests are necessary?

When taking into consideration that diabetes is a disease that involves many systems in the body, aside from physical examination, both preprandial and postprandial blood tests for determining blood sugar levels, blood lipids and other blood parameters, eye ground examination, urine test etc. should also be conducted in the appropriate time intervals.

Can diabetes be treated?

Although there are many different drug classes, it is not possible to cure the disease completely yet, thus doctors try to prevent possible results that diabetes might have by trying to keep blood sugar levels between specific limits.

Which medications are used in the treatment of diabetes?

The primary and indispensable treatment of diabetes is lifestyle changes. Adjusting diet, working out regularly with the right exercises, quitting smoking, limiting alcohol consumption and of course, using medications at the right doses and time intervals as prescribed by the doctor are among the most important points to take into account. Medications can be divided into two groups:

Medications administered orally

Based on their impact mechanism, these are insulin sensitizing agents, insulin secretagogue drugs, medications that reduce glucose absorption in the intestines, medications that prevent certain hormones from breaking in the intestines thus adjusting insulin secretion, and medications that prevent reabsorption of insulin from the kidneys.

Medications administered through injections

These are medications that act like certain hormones in the intestines, insulin and insulin-likes.

In short, diabetes can be treated with specific dietary and exercise programs, with additional oral medications if needed; however, some patients may require the administration of insulin based on the stage and severity of the disease. Moreover, comorbidities and accompanying disorders (high blood pressure, blood lipids imbalance, renal / eye / nerve involvement etc.) should also be treated.