Endocrine disorders are conditions that affect the endocrine system. While they may have mild or non-specific symptoms, they can significantly impact quality of life.
In this article, we analyse:
- what endocrine diseases are
- which are the most common
- what signs may suggest a hormonal imbalance
- which diagnostic tools allow for a correct diagnosis.
Professor Rosa Maria Paragliola, a lecturer in Endocrinology at UniCamillus University, provided the scientific advice for this text.
What are endocrine disorders?
The endocrine system is made up of glands that produce hormones and regulate various bodily functions, including metabolism, growth, fertility and the stress response.
Endocrine disorders can be caused by changes in hormone production or structural abnormalities in the glands themselves.
The seven main endocrine glands are:
The main endocrine glands include:
- thyroid
- parathyroid
- pancreas
- adrenal glands
- pituitary gland
- gonads
- pineal gland.
“Dysfunctions of these glands can be caused by insufficient or excessive hormone production”, explains Paragliola. “In addition, there are recognised disorders of the glandular ‘structure’, such as benign nodules or, in rare cases, malignant tumours”.
These glands play a crucial role in maintaining the body’s balance, so any dysfunction can have multiple repercussions.
What are the most common endocrine disorders?
“Thyroid disorders are among the most common endocrine disorders”, emphasises Professor Paragliola. Other frequently observed conditions include diabetes and disorders related to calcium and bone metabolism, as well as those affecting the adrenal glands and the pituitary gland.
Thyroid: main disorders
Thyroid disorders include:
- Hypothyroidism
- Hyperthyroidism
- Thyroiditis
- Thyroid nodules.
“Hypothyroidism is characterised by reduced production of thyroid hormones, while hyperthyroidism is caused by overactivity of the thyroid gland”, explains Professor Paragliola. The most common cause of both conditions is an autoimmune disorder. Other forms of thyroid inflammation (thyroiditis) can be induced by drugs or microbial agents (e.g. viruses or bacteria).
Thyroid nodules are also a common condition. “In the vast majority of cases, they are benign, but they require adequate clinical and ultrasound evaluation”.
Diabetes mellitus
Diabetes is another very common endocrine disorder that has a significant global impact on health. Type 1 diabetes is caused by the autoimmune destruction of insulin-producing cells in the pancreas. Type 2 diabetes, on the other hand, is linked to insulin resistance and is often associated with being overweight and leading a sedentary lifestyle.
Effective management is essential to prevent chronic vascular complications involving the kidneys, retina, peripheral nervous system, and cardiovascular system.
Calcium metabolism disorders
These include osteoporosis, which is sometimes linked to parathyroid gland dysfunction, as in the case of primary hyperparathyroidism.
Adrenal gland disorders
The adrenal glands are responsible for producing essential hormones for stress and blood pressure regulation. They can be affected by significant disorders. “Although rarer, other significant endocrine disorders are represented by adrenal gland diseases. Cushing’s syndrome, which is caused by excessive cortisol production, and Addison’s disease, which is caused by cortisol deficiency, can have a significant impact on quality of life”, the expert points out.
Pituitary gland disorders
The pituitary gland is the main endocrine gland and regulates many other glands. Disorders affecting its function can have complex effects on the body. “Excessive or reduced hormone production can both cause complex alterations with effects on growth, fertility and metabolism”, notes Professor Paragliola. Timely diagnosis is essential to prevent multisystem complications.
What are the symptoms of endocrine diseases?
The symptoms of endocrine disorders can vary greatly depending on which gland is affected and how severe the dysfunction is. “Many endocrine diseases can begin without symptoms, particularly when there is a mild functional change, or they can present with vague or non-specific initial symptoms”, explains Paragliola. It is essential to recognise the early signs in order to intervene promptly and prevent long-term complications. Indicators of endocrine imbalances can include weight changes, persistent fatigue, menstrual disorders, irritability, skin problems and fertility issues.
Symptoms of thyroid disorders
Symptoms of thyroid disorders manifest differently depending on the type of dysfunction. “In hypothyroidism, persistent asthenia, difficulty concentrating, weight gain and dry skin are common. Tachycardia, tremors, nervousness, heat intolerance and weight loss, on the other hand, should raise suspicion of hyperthyroidism”.
Symptoms of diabetes
Symptoms of diabetes can develop slowly and initially be mild. “Type 2 diabetes mellitus can also have a subtle onset, with symptoms including fatigue, increased urination and increased fluid intake, sometimes even before obvious hyperglycaemia”.
Symptoms of calcium metabolism disorders
“Among calcium metabolism disorders, hypocalcaemia is characterised by paresthesia and muscle cramping. If these symptoms are present, it is advisable to immediately measure calcium levels”, warns our expert.
Symptoms of adrenal and pituitary disorders
Some adrenal and pituitary disorders present with non-specific but clinically relevant systemic symptoms. “In hypercortisolism, the appearance at a young age of elements of ‘metabolic syndrome’ (e.g. hypertension, diabetes, abdominal and thoracic fat accumulation, and dyslipidaemia) should raise suspicion of endogenous hypercortisolism”, Professor Paragliola continues. In primary adrenal insufficiency, however, worsening asthenia, weight loss, hypotension, gastrointestinal disorders, and dark spots on the skin and inside the mouth are particularly significant, especially if the patient has other autoimmune diseases.
Regarding the pituitary gland, the expert states that menstrual cycle changes in women or sexual dysfunction in men should prompt an evaluation of pituitary function. In particular, it is advisable to check the balance between the brain, pituitary gland and gonads, and to measure prolactin levels.
Endocrine diseases by age and gender
Depending on age and gender, endocrine disorders can manifest in different ways, which affects both diagnosis and treatment. “Age and gender are determining factors in the onset of endocrine disorders. In order to interpret laboratory tests correctly, it is necessary to consider the physiological hormonal changes that occur at different stages of life”.
Women and thyroid disorders
Thyroid diseases, particularly autoimmune thyroid diseases, are more prevalent in adult women. “This greater susceptibility is partly due to the influence of sex hormones on the immune system”, explains the professor. In addition, certain stages of a woman’s life, such as the postpartum period and menopause, make her particularly vulnerable to the onset or reactivation of thyroid dysfunction.
Advanced age and bone metabolism
Bone metabolism and the risk of osteoporosis are closely linked to age and gender. “Osteoporosis is more prevalent in older individuals and affects women after menopause, when reduced oestrogen levels promote bone loss and skeletal fragility”.
Endocrine disorders: causes and risk factors
Endocrine disorders can be caused by a combination of genetic, environmental, pharmacological and lifestyle factors. “Specific risk factors have been identified for many endocrine disorders”, emphasises Professor Paragliola. “These are linked to genetic predisposition, individual characteristics, environmental conditions and, in some cases, pharmacological treatments”. Recognising these factors is essential for preventing the onset of endocrine disorders or for intervening promptly in predisposed individuals.
Genetic predisposition and autoimmune diseases
Some endocrine disorders, particularly autoimmune disorders, are more prevalent in individuals with a genetic predisposition. However, environmental factors and prolonged stress can also contribute to the onset of these conditions.
Pharmacological factors
Some medications can induce endocrine dysfunctions. As Professor Paragliola points out, “high doses of synthetic glucocorticoids interfere with the balance of the hypothalamic–pituitary–adrenal axis and with bone and carbohydrate metabolism, especially in cases of prolonged use. Other drugs, such as amiodarone, lithium, and certain active ingredients used in oncology, can also cause alterations in thyroid function”.
Lifestyle and environmental factors
Several lifestyle factors, such as an imbalanced diet and a sedentary lifestyle, increase the risk of developing endocrine disorders, particularly diabetes and metabolic syndrome. It is also important to emphasise the harmful effects of smoking, as this increases the risk of developing thyroid ophthalmopathy in individuals with autoimmune hyperthyroidism.
Endocrine diseases: diagnosis and prevention
Timely diagnosis is essential for the early identification of endocrine disorders and the prevention of long-term complications. “The correct diagnostic approach involves a series of specific laboratory tests and, if necessary, instrumental tests, based on clinical suspicion”, explains Professor Paragliola.
Laboratory tests often include hormone assays under basal conditions, while dynamic tests may be necessary in selected cases to assess the response of individual glands. “Laboratory tests often need to be accompanied by specific instrumental tests for each individual situation (ultrasound, CT scan or MRI scan). In selected cases, nuclear medicine techniques are required to assess the appearance and function of the gland, especially when nodules that produce too many hormones are suspected”, adds Professor Paragliola.
Prevention and lifestyle
Although some endocrine disorders have a genetic or autoimmune component, many conditions can be prevented or managed with a healthy lifestyle.
The main recommended behaviours include:
- maintaining a healthy body weight
- engaging in regular physical activity
- following a balanced diet
- reducing stress and avoiding smoking
- undergoing regular check-ups
“Diet and lifestyle are essential for the prevention and treatment of various conditions”, the expert continues. “A healthy, varied and balanced diet that is low in refined sugars and saturated fats improves the function of the endocrine system and helps to maintain cardiovascular health. Regular physical activity promotes insulin sensitivity, increases muscle strength, and improves bone density. Stress management can positively influence the outcome of various endocrine disorders”.
How to manage endocrine diseasesand stay healthy
Endocrine disorders are common, but in most cases they can be effectively managed if recognised early and monitored clinically. “Awareness of symptoms, attention to risk factors and a healthy lifestyle are essential tools for maintaining hormonal balance, metabolic well-being and quality of life”, concludes the expert.
Professor Rosa Maria Paragliola lectures on the MSc in Medicine and Surgery taught in English (third year) and on the MSc in Human Nutrition Sciences (second year).