Endocrine patho Flashcards
Hypothalamic Disorders-
Interruption of Infundibulum includes:
Destructive lesions
Rupture after head injury
Surgical transaction
Stem tumor
Anterior Pituitary Disorder-
Pan-hypo-pituitar-ism
Only occurs with both anterior and posterior pituitaries are affected
ACTH, TSH, LH, FSH, GH, PRL, ADH deficiency
Anterior Pituitary Disorder-
Hypo-pituitar-ism
Usually due to pituitary infraction (necrosis) on infundibulum
Includes: Sheehan Syndrome, Hemorrhage, Shock
Anterior Pituitary Disorder -
Hypo secretion of GH
Dwarfism - in children and adolescents -Decrease in GH, Open plates
Metabolic Disease - adulthood - Decrease in GH, closed plates, Hypothyroid, weight gain, cold, slow metabolism
Anterior Pituitary Disorder-
Hyper-pituitar-ism
Commonly caused by a benign slow growing pituitary adenoma (benign tumor)
Manifestation: headache, fatigue, visual changes (pinched optic chiasm)
Anterior Pituitary Disorder-
Hyper secretion of GH
Giagantism- in children and adolescents - Increase in GH, open plates
Acromegaly- adulthood - Increase in GH, closed plates, ischemia to vessels, damage to nerves
Posterior Pituitary Disorder-
Hyper-secretion of ADH
ADH = reabsorption of Na
Inc. ADH = inc reabsorption of Na, dec water
caused by: Brain injury or infection, Pulmonary disease, psychiatric drugs
Posterior Pituitary Disorder-
Water intoxication
Decrease in Na = hypo-osmolality
Decrease in urination , Increase BP
Posterior Pituitary Disorder-
Diabetes Inspidus
Insufficiency of ADH: polyuria, polydipsia, diluted urine
Neurogenic: insufficient amounts of ADH - post pit path
Nephrogenic: inadequate response to ADH- kidney patho
Psychogenic: excessive consumption of water
Thyroid Disorder-
Hyperthyroidism
3 causes: Graves disease (most common) - autoimmune, B cells produce antibodies that fit TSH receptors - overproduction of TSH
Thyro-toxi-cosis (negative feedback does not work on hypothalamus)
Toxic nodular disease (benign)
Symptoms:
Goiter, Exophthalmos, Thyrotoxic crisis
Thyroid Disorder-
Hypo-thyroidism
inc. TRH and TSH
dec. TH
Autoimmune thyroiditis (Hashimoto Disease) : most common
Thyroiditis
Postpartum thyroiditis (hypo and hyper)
Thyroid carcinoma:
Symptoms:
Fatigue, weight gain, hair loss, Myxedema, Myxedema coma (in brain)
Endocrine Pancreas Disorder
Diabetes Mellitus
Type I : insulin dependent
Pancreatic atrophy and specific loss of Beta cells, premature activation of zymogens
Type II: non-insulin dependent
prolonged hyperglycemia leads to increased resistance of insulin
Endocrine Pancreas Disorder
Diabetes Mellitus - Type I
Genetic susceptibility
Viral infection
Immune destruction of Beta cells
Hyperglycemia polydipsia, polyuria, polyphagia, weight loss, fatigue, keoacidosis
Endocrine Pancreas Disorder
Diabetes Mellitus - Type II
Most common
Risk factors: obesity, family history, ethnicity, puberty, female and metabolic syndrome
Endocrine Pancreas Disorder
Acute Conditions of Diabetes Mellitus
Hypoglycemia : 90% of Type I, insulin shock/reaction
Diabetic ketoacidosis: drop in insulin, inc in counter regulatory hormones - due to breakdown of fats and proteins - peaks adolescence