Endocrine system disease DR: JAMA Endocrine System The endocrine system is all the organs of the body that are 2 endocrine glands. An endocrine gland secretes hormones. Hormones are molecules that are secreted into the blood. Hormones are substances that are secreted by one group of cells that affects the physiology of another group of cells (organs). The endocrine system is controlled by the pituitary gland and the hypothalamus. Compared to most other organs in the body, endocrine organs are well vascularized. Thyroid gland Anatomy of thyroid gland: The thyroid gland is situated in the neck anterior to the thyroid cartilage. It weighs around 15-20g in the adult. The thyroid gland has two lobes, the right and the left, joined by an isthmus. Physiology: It secretes mainly thyroxin (T4) and a small amount of triiodothyronine (T3). Hypothyroidism Hypothyroidism is more common in females. It can be due to either: a. Primary disorders of the thyroid gland (primary hypothyroidism) or b. Decreased TSH secretion by the pituitary gland (secondary hypothyroidism) Cause of hypothyroidism Autoimmune disease Treatment for hyperthyroidism. Thyroid surgery. Radiation therapy. Medications. Clinical feature Weakness. Constipation Cold intolerance Large tongue Dry coarse skin Poor memory Pallor Poor concentration Hair loss Carpal tunnel syndrome Puffy face, hand, and feet Delayed relaxation of deep Myxedema Weight gain, poor appetite Hypothermia Goiter Hoarse voice reflexes Bradycardia Hypertension Ischemic heart disease Pericardial effusion Oral manifestation 1. Delayed eruption 2. Enamel hypoplasia in both dentitions. 3. Anterior open bite 4. Macroglossia 5. Micrognathia 6. Thick lips 7. Dysgeusia 8. Mouth breathing Management Hypothyroidism should be treated with oral levothyroxine. The treatment is generally started with low dose (50-100μg daily) and gradually increased. In elderly, a smaller starting dose (25 μg) is preferred to 32`avoid cardiac side effect. Complication of hypothyroidism Goiter. Heart problems. Mental health . Peripheral neuropathy Myxedema. Infertility. Hyperthyroidism Hyperthyroidism means the thyroid makes too much thyroid hormone. thyroid is a gland in the front of the neck . It controls the metabolism, which is how body turns food into energy. It also affects heart, muscles, bones, and cholesterol. Cause Graves' Disease Functioning adenoma ("hot nodule") and toxic multinodular goiter (TMNG) Excessive intake of thyroid hormones. Abnormal secretion of TSH. Thyroiditis (inflammation of the thyroid gland) Excessive iodine intake. Clinical features Sudden weight loss. Rapid heartbeat (tachycardia) Increased appetite Nervousness, anxiety and irritability Tremor Sweating Changes in menstrual patterns Increased sensitivity to heat Goiter Fatigue, muscle weakness Difficulty sleeping Skin thinning Oral manifestation of hyperthyroidism 1. Accelerated dental eruption in children 2. Maxillary or mandibular osteoporosis 3. Enlargement of extra glandular thyroid tissue(mainly in the lateral posterior tongue) 4. Increased susceptibility to caries 5. Periodontal disease 6. Burning mouth syndrome 7. Development of connective-tissue diseases like Sjögren’s syndrom or systemic lupus erythematosus Investigation of hyperthyroidism Serum total and unbound (free) T3 and T4 are increased and TSH level is suppressed. TSH stimulation test ESR may be increased in sub acute thyroiditis. Ultrasonography . radioisotope iodine scanning serology Management Treatment of hyperthyroidism depends on the cause and severity of the disease Beta blockers Iodides Antithyroid drugs (methimazole) Radioactive iodine Surgery (subtotal thyroidectomy) Complication Hyperthyroidism can lead to a number of complications: Heart problems. Brittle bones. Eye problems. Red, swollen skin. Thyrotoxic crisis. Calcium metabolism The total amount of calcium is about 2 % of the body weight. Most of it (99%) is in the bones. The normal total serum calcium level is 9-10.5 mg/dL (2.2- 2.6 mmol/L). Half of this is present in free form (ionized calcium) and the remainder is bound with proteins mainly albumin. The total serum calcium level is low in conditions in which hypoalbuminemia exists, however, free calcium level is normal. The ionized calcium is responsible for the physiological functions of the calcium such as nerve function and muscle contraction. hypocalcaemia A low calcium level may result from a problem with the parathyroid glands, as well as from diet, kidney disorders, or certain drugs. As hypocalcemia progresses, muscle cramps are common, and people may become confused, depressed, and forgetful and have tingling in their lips, fingers, and feet as well as stiff, achy muscles. Usually, the disorder is detected by routine blood tests. Causes of hypocalcaemia Vitamin D deficiency. Chronic renal failure. Magnesium deficiency. Alcoholism. Biphosphonate therapy - drugs used to treat high blood calcium levels or pills used to treat osteoporosis. Certain types of leukemia or blood disorders. Sign and symptoms memory loss muscle spasms numbness and tingling in the hands, feet, and face depression Hallucinations Seizures . Anxiety . Papilledema. psychosis Investigation Serum calcium is low. Serum phosphorus is elevated Serum parathyroid hormone level is elevated ECG . Treatment of hypocalcemia Calcium and vitamin D supplements may be used Hypercalcaemia Hypercalcemia is a condition in which the calcium level in blood is above normal. Too much calcium in blood can weaken bones, create kidney stones, and interfere with the way heart and brain works. Hypercalcaemia most commonly results from overactive parathyroid glands. Cause Adenoma Hyperplasia Carcinoma Tumors producing PTH related proteins (malignancy of lung, ovary, kidney) Hematological malignancies (Myeloma, lymphoma, leukemia) Sarcoidosis Vitamin D excess Hyperthyroidism Milk alkali syndrome Immobilization Clinical features Constipation Nausea Decrease appetite Abdominal pain Peptic ulcer disease Kidney stones Bone aches and pains Fractures polyuria, polydipsia, renal colic and nephrolithiasis. Oral manifestation of hypercalcimae Jaw bone dimeniralilztion Loss of lamina dura Osteitis fibrous cystica Investigation Serum calcium and serum PTH levels are measured. High PTH level is present in primary hyperparathyroidism while it is low in malignancies where parathyroid related protein (PTHrP) is raised. Other tests are done to detect the presence of malignancies if suspected. Measurement of thyroid hormones and vitamin D levels may be required. ECG Management Calcimimetics. Bisphosphonates. Prednisone. IV fluids and diuretics. Complication of hypercalcemia Hypercalcemia complications may include: Osteoporosis. Kidney stones. Kidney failure. Nervous system problems. Abnormal heart rhythm (arrhythmia). PARATHYROID DISORDERS There are four parathyroid glands situated posterior to the thyroid gland. These produce parathyroid hormone (PTH) which is a peptide comprising of 84 amino acids. The secretion of PTH is regulated by the ionized calcium levels in serum. The important physiological roles of PTH are: a. It promotes resorption of calcium from bones b. It promotes resorption of calcium from renal tubules c. It inhibits the absorption of phosphate by the renal Hypoparathyroidism Hypoparathyroidism is an uncommon condition in which body secretes abnormally low levels of parathyroid hormone (PTH). PTH plays a key role in regulating and maintaining a balance of body's levels of two minerals — calcium phosphorus. Cause Acquired hypoparathyroidism. Autoimmune disease. Hereditary hypoparathyroidism. Extensive cancer radiation treatment of face or neck. Low levels of magnesium in blood,. Clinical feature Burning (paresthesias) in fingertips, toes and lips Muscle aches affecting legs, feet, abdomen or face spasms of muscles, particularly around the mouth, also in the hands, arms and throat Fatigue or weakness Patchy hair loss, such as thinning of the eyebrows Dry, coarse skin Brittle nails Headaches Depression. Memory problems Oral manifestation of Hypoparathyroidism 1. Dental abnormalities: - Enamel hypoplasia in horizontal lines - Poorly calcified dentin -Widened pulp chambers - Dental pulp calcifications - Shortened roots - Hypodontia - Delay dental development 2. Mandibular tori 3. Chronic candidiasis 4. Paresthesia of the tongue or lips 5. Alteration in facial muscles. Investigation The serum calcium is low, serum phosphate is high, and serum alkaline phosphatase is normal. The PTH levels are low. It is normal or high in pseudohypoparathyroidism. The magnesium level is measured to rule out hypomagnesemia. Treatment Oral calcium carbonate tablet. Vitamin D. Dietary steps Rich in calcium. Low in phosphorus-rich items. Intravenous infusion. Risk factor Factors that may increase risk of developing hypoparathyroidism include: Recent neck surgery, particularly if the thyroid was involved. A family history of hypoparathyroidism. Having certain autoimmune or endocrine conditions, such as Addison's disease — a condition characterized by a deficit in hormone production by the adrenal glands Hyperparathyroidism Hyperparathyroidism is an excess of parathyroid hormone in the bloodstream due to over activity of one or more of the body's four parathyroid glands. These glands are about the size of a grain of rice and are located in neck Cont... Primary hyperparathyroidism is caused by hypersecretion of PTH. In majority of cases, this is due to autonomous hypersecretion of PTH. Primary hyperparathyroidism (adenoma or hyperplasia) may be familial and part of multiple endocrine neoplasia Secondary hyperparathyroidism is characterized by the hypersecretion of PTH due to stimulation byhypocalcemia .There is hyperplasia of all parathyroid glands. Tertiary hyperparathyroidism hyperplastic parathyroid glands (as in case of secondary hyperparathyroidism) may result in adenoma formation and autonomous PTH Clinical feature Fragile bones that easily fracture (osteoporosis) Kidney stones Excessive urination Abdominal pain Tiring easily or weakness Depression. Bone and joint pain Frequent complaints of illness with no apparent cause Nausea, vomiting or loss of appetite Oral manifestation 1. Dental abnormalities: -Widened pulp chambers - Development defects - Alterations in dental eruption -Weak teeth - Malocclusions 2. Brown tumor 3. Loss of bone density 4. Soft tissue calcifications Investigation In primary hyperparathyroidism serum PTH level is elevated, serum calcium is high and phosphate is low. Serum alkaline phosphatase is raised if bone disease is present. In secondary hyperparathyroidism, PTH level is elevated. Serum calcium is low and phosphate is high. Bone X-ray may show demineralization. Skull X-ray . Radioimaging and ultrasound neck are needed to localize and diagnose parathyroid tumors. Management Surgery. Calcimimetics. Hormone replacement therapy. Bisphosphonates. Pituitary gland Anatomy: The pituitary gland is situated in the sella turcica. The gland is connected to the hypothalamus with pituitary stalk . The pituitary gland has two lobes anterior and posterior. Portal vessels carry blood from the hypothalamus to the anterior lobe while the posterior lobe receives nerve fibers from the hypothalamus. Physiology: The anterior lobe of pituitary gland secretes growth hormone (GH), prolactin (PRL), adrenocorticotropic hormone (ACTH), thyroid stimulating hormone (TSH),follicle stimulating hormone (FSH) and luteinizing hormone (LH). The secretion of these hormones is controlled by the hypothalamus. The hypothalamus stimulates or inhibits the secretion of anterior pituitary hormones through the release of substances in the portal vessels. Anti-diuretic hormone (ADH) and oxytocin are synthesized in the hypothalamus and transported through the nerve axons to the posterior pituitary. Hypopituitarism Hypopituitarism may be caused by hypothalamic dysfunction or pituitary disease. There may be single or multiple hormonal deficiencies. Hypopituitarism is a rare disorder in which the pituitary gland either fails to produce one or more of its hormones or doesn't produce enough of them. Cause adenoma, granulomas, metastatic carcinoma and brain tumors such as craniopharyngioma and meningioma. Pituitary tumor. Other causes are Trauma . Surgery. Radiation . Encephalitis . stroke. Clinical features Fatigue . Hot flashes, and inability Weight loss. to produce milk for breast-feeding in women Decreased facial or body hair in men Short stature in children Decreased sex drive . Sensitivity to cold or difficulty staying warm Decreased appetite. Facial puffiness Anemia Infertility Oral manifestation Hypopituitarism Tooth eruption is delayed Root length is reduced Malocclusion Saliva gland are prone to hypo function Investigation blood tests. Stimulation or dynamic testing. Brain imaging. Vision tests. Management Remove underlying cause Hormone replacement medications may include: Corticosteroids. Levothyroxine. Sex hormones. Growth hormone. Hyperpituitarism Hyperpituitarism also called acromegaly and gigantism. Hyper secretion of pituitary hormones secondary to macro adenomas can interfere with other pituitary hormone functions, resulting in target organ hormone deficiencies. Acromegaly Acromegaly is a hormonal disorder that develops when the pituitary gland produces too much growth hormone during adulthood. When this happens, the bones increase in size, including those of hands, feet and face. Acromegaly usually affects middle-aged adults. Acromegaly is caused by an excess of the growth hormone secreted by pituitary adenoma. In most cases the adenoma is more than 1 cm in diameter (macroadenoma). Clinical features The most common symptoms are headache and sweating Enlarged hands and feet enlarged facial features Coarse, oily, thickened skin Excessive sweating and body odor Small outgrowths of skin tissue Fatigue and muscle weakness A deepened, husky voice due to enlarged vocal cords and sinuses Severe snoring due to obstruction of the upper airway Impaired vision Pain and limited joint mobility Menstrual cycle irregularities in women Erectile dysfunction in men Enlarged liver, heart, kidneys, spleen and other organs Increased chest size (barrel chest) Oral manifestation Enlargement of tongue Spacing in the tooth Malocclusion Mandible increase in thickness and length Chin is prominent Hypercementosis Enlarged jaw Investigation The serum GH is measured during oral glucose tolerance test. In normal subjects, plasma GH is suppressed to below 2 mU/L. Failure of suppression of GH level or paradoxical rise suggests acromegaly. Management Drugs used to lower the production or block the action of GH include: Somatostatin analogues. Dopamine agonists. Growth hormone antagonist. Complication High blood pressure (hypertension) Cardiovascular disease, particularly enlargement of the heart Osteoarthritis Diabetes mellitus Precancerous growths (polyps) on the lining of colon Sleep apnea. Carpal tunnel syndrome. Spinal cord compression Vision loss Gigantism Gigantism is abnormal growth due to an excess of growth hormone during childhood. causes The most common cause of too much growth hormone release is a noncancerous (benign) tumor of the pituitary gland. Other causes include: Carney complex Multiple endocrine neoplasia type 1 (MEN-1) Neurofibromatosis If excess growth hormone occurs after normal bone growth has stopped, the condition is known as acromegaly. Gigantism is very rare. Clinical features The child will grow in height, as well as in the muscles and organs. This excessive growth makes the child extremely large for his or her age. Other symptoms include: Delayed puberty Double vision prominent jaw Gaps between the teeth Headache Increased sweating Large hands and feet with thick fingers and toes Weakness Diagnosis Growth hormone test Thyroid hormone Prolactin hormone test Treatment SURGERY Addison’s Disease Adrenal cortex secretes three major classes of steroids: a. Glucocorticoids (cortisol) b. Mineralocorticoids (aldosterone) c. Adrenal androgens Addison's disease Addison's disease is a disorder that occurs when body produces insufficient amounts of certain hormones produced by adrenal glands. In Addison's disease, the adrenal glands produce too little cortisol and often insufficient levels of aldosterone as well. Cause Addison's disease Autoimmune Tuberculosis Histoplasmosis HIV/AIDS Bilateral adrenalectomy Intraadrenal hemorrhage Amyloidosis Hemochromatosis Metastatic carcinoma Clinical feature Muscle weakness and fatigue Weight loss and decreased appetite Darkening of skin (hyperpigmentation) Low blood pressure fainting Low blood sugar (hypoglycemia) Nausea, diarrhea or vomiting. Muscle or joint pains Irritability Depression Body hair loss or sexual dysfunction in women. Oral manifestation The oral mucosa can in turn develop black-bluish plaques, mainly affecting buccal mucosa but it can also be seen on the gums, palate, tongue and lips Diagnosis ACTH stimulation test: Cortisol level fails to increase in response to exogenous ACTH. ACTH level: This is high in Addison’s disease Plasma rennin activity is high with low or low-normal aldosterone level Measurement of antibodies against steroid secreting cells Tests for tuberculosis CT/MRI to identify metastatic malignancy Elisa for HIV Management Oral corticosteroids. Corticosteroid injections. Androgen replacement therapy. Cushing’s Disease Cushing’s disease is due to hypersecretion of ACTH by the pituitary gland and it is the most common cause of Cushing’s syndrome. Cushing’s syndrome is defined as a state of cortisol excess due to any cause. ACTH causes increased production of corticosteroids by the adrenal cortex. Cushing’s disease is usually benign small pituitary adenoma (micro adenoma). Clinical feature Moon face Buffalo hump hypertension. Osteoporosis. muscle wasting. Hyperglycemia. impaired wound healing and psychosis Weight gain . Diagnoses for cushing’s syndrome Blood test to determine Blood glucose level White blood cell count and potassium level Abdominal CT Treatment for cushing’s syndrome Laparoscopic adrenalectomy Possible complication Diabetes High blood pressure Infections Kidney stones Mental illness Compression fractures. Conn’s syndrome conns syndrome Is a disease of the adrenal glands involving excess production of a hormone called aldosterone . Cause for Conn’s syndrome Excess production of aldosterone by the tumor leads to the development of Conn's syndrome with high blood pressure and low potassium level. Symptoms for Conn's syndrome Hypertension High aldesterone level in the blood act on the kidney to increase the loss of mineral potassium in the urine. Fall in blood potassium to lead Tiredness Muscle weakness Passing of volume of urine (polyuria) Diagnosis CT scan Radiologist inserts a small catheter into adrenal vein. Treatment Adrenalectomy Diabetes mellitus Diabetes is a metabolic disorder resulting in abnormally high blood sugar levels (hyperglycemia) Blood sugar is normally controlled by a hormone called insulin that is secreted by the pancreas. Diabetes Mellitus Types Of Diabetes Type 1 Diabetes Type 2 Diabetes Diabetes Mellitus Type 1 Diabetes Once Known as insulin-dependent or juvenile Pancreas produces little or no insulin Accounts for 5-10% of diagnosed diabetes Need Insulin injections to survive INSULIN DEPANDENT DIABETES Diabetes Mellitus It caused: Autoimmune. Genetic. Environmental factors. Risk Factors: Occurs equally among males and females Siblings of people with type 1 diabetes Children of parents with type 1 diabetes . Overweight Family History Diabetes Mellitus Type 1 Diabetes Symptoms Usually develop over short period Increased thirst, urination, constant hunger, weight loss, blurred vision, and extreme tiredness. If not diagnosed or treated with insulin, a person can lapse into a life-threatening coma Diabetes Mellitus Treatment Daily injections of Insulin are basic therapy Injections must be balanced with meals and daily activities Glucose levels must be closely monitored through blood sugar testing Diabetes Mellitus Type 2 Diabetes Most common form About 90-95% of people have this type Usually develops in adults over 40 yrs old The pancreas produces insulin, but for some reason , the body can’t use the insulin or are insulin resistance. •Diabetes Mellitus Risk for Type 2 Diabetes over age 45 family history of diabetes overweight Lack of exercise regularly Metabolic syndrome (also called insulin resistance syndrome). Hypertension. Abnormal lipid levels. History of gestational diabetes. Type 2 Diabetes Symptoms Develop gradually and are not as noticeable as type 1 Symptoms include feeling tired or ill. frequent urination (esp. at night). unusual thirst. weight loss. blurred vision. frequent infections. slow healing of sores. Diabetes Mellitus Treatment of type 2: Diet Exercise Blood Testing Some take oral drugs or insulin to lower blood glucose levels. Diabetes Mellitus Medications Oral Tolbutamide Chloropropamide Tolazamide Acetohexamide Glyburide Glipizide Glucotrol GLUGOPHAGE Oral manifestation of diabetes Gingivitis and periodontisis Periradicular osteolytic inflammatory lesion Loss of teeth Xerostomia (dry mouth ) Lesions of oral mucosa and tongue . Complication of diabetes Heart Disease is 2-4 times common in diabetics High Blood Pressure affects 60-65 percent of people with diabetes blindness among adults 20-74 years . At least 15% of all people with diabetes with eventually have a foot ulcer/and or leg ulcer. Gangrene is common in diabetes due to poor circulation of lower extremities. Periodontal disease 82% Diabetes Complications Foot/Leg/Heel Ulcers Diabetic Emergencies in the Dental Office The most common diabetic emergency in the dental office is Hypoglycemia. Insulin Shock (Hypoglycemia) Occurs when insulin levels are too high Who have been prevented from eating at the expected time Can occur if a pt accidentally or intentionally takes too much insulin Alcohol Intake It is an Urgent medical emergency Prolonged hypoglycemia can result in serious brain damage Insulin Shock (Hypoglycemia) Signs and Symptoms Weak, Rapid Pulse Cold, clammy skin Weakness Headache Irritable, nervous behavior May appear intoxicated Coma (severe cases) Management of hypoglycemia in dental clinic The patient is often aware of what happening and able to warm the dentist. then give glucose tablets or powder or sugar(at least four lamp) as sweetened drink, repeated if symptoms are not relieved. The dental practitioner should give the patient approximately 15 g of oral carbohydrate in a form that will be absorbed rapidly.. If consciousness has been lost and an intravenous line is in place,25 to50ml of a 50% dextrose solution (D50) or 1 mg of glucagon. Can be given intravenously. Management of hyporglacemia in dental clinic If an intravenous line is not in place,1 mg of glucagon can be injected subcutaneously or intramuscularly at almost any body site. Glucagon injection causes rapid glycogenolysis the liver, releasing stored glycogen and rapidly elevating blood glucose. Following treatment, the signs and symptoms of hypoglycemia should resolve in 10 to 15 minutes. The patient should be observed for 30 to 60 minutes after recovery. Insulin Shock (Hypoglycemia) in dental clinic Treatment In the dental clinic, care is limited to activating the emergency medical system. Airway Breathing Circulation Disability Asses Pt for trauma-protect C-spine if Ness. Administer O2 per assessment Monitor vital sing, Suction Airway if Necessary The patient should be transported to a hospital as soon as Insulin Shock (Hypoglycemia) Treatment BLS Cont. Obtain Medical HX Check Finger Glucose, if <60 and pt’s airway is protected administer oral glucose Transport Pt in position of comfort Reassess vital signs as needed. Comparison Hypoglycemia Hyperglycemia Onset Sudden Slower onset Skin cold, pale, moist Skin warm, red, dry Normal Weak, rapid pulse Acidic Breath Kussmaul Respiration's Weakness/ Rapid Pulse uncoordination Headache Irritable/Nervous Behavior Polyuria, polydypsia, polyphagia Nausea/Vomiting Falling Blood Pressure TREAMENT AND MANAGEMENT OF DIABETETTIC PATIENT IN DENTAL CLINIC Good history and examination Control of diabetic Other key dental treatment considerations(restoration, extraction). Antibiotic therapy specially tetracycline Scalling technique Root planing Regular dental clinic visit