final exam Flashcards
(241 cards)
different pancreatic cell types: alpha cell
stimulate release of glucagon and glycogen stores and promote gluconeogenesis
different pancreatic cell types: beta cell
stimulate release of insulin and lower blood glucose level
different pancreatic cell types: delta cell
inhibit glucagon and insulin secretion
acute pancreatitis
pathogenesis
causes
inflammation and hemorrhage of pancreas (premature activation of trypsin –> pancreatic enzymes autodigest pancreatic parenchyma
alcohol, gallstones, trauma
pancreatic pseudocysts (liquefactive necrosis), pancreatic abscess (E. coli)
chronic pancreatitis
pathogenesis
causes
symptoms
signs
risks
fibrosis of pancreatic parenchyma secondary to recurrent acute pancreatitis
alcohol, CF, idiopathic
epigastric pain radiating to back, pancreatic insufficiency
dystrophic calcification on xray (“chain of lakes” pattern)
may inc. risk of pancreatic carcinoma
T1D
pathogenesis
classification
risks
symptoms
treatment
insulin deficiency (hyperglycemia) due to autoimmune destruction of beta cells by T lymphocytes, inflammation of islets
HLA-DR3 and DR4, autoantibodies against insulin
untreated –> ketosis and diabetic ketoacidosis
weight loss, polydipsia, polyphagia, weakness
need lifelong insulin
T2D
pathogenesis
side effects
diagnosis (levels)
non-insulin dependent, insulin resistance and inadequate insulin secretion, resistance linked with inc. levels of free fatty acids and pro-inflammatory cytokines
lipotoxicity (toxic effects of excess free fatty acids), unregulated secretion on cytokines
amyloid deposits
dx: (normal 70-120 ug/dL) random > 200, fasting > 126, gestational > 200
T1D emergency: diabetic ketoacidosis
pathogenesis
symptoms
treatment
bodys change to fat metabolism and build up of ketones (acidosis)
hyperglycemia (>300), hypercalcemia, Keussmaul respirations, dehydration, fruity breath
tx with fluids, insulin, electrolytes
T2D emergency: hyperglycemic hyperosmolar non-ketotic coma (HHNC)
pathogenesis
sign
treatment
(>500 mg/dL) —> diuresis with hypotension and coma
absent ketones due to dec. insulin, hyperglycemia
tx with fluids and insulin
hypoglycemia: insulin shock
levels
treatment
< 60 mg/dL, medical emergency
tx with oral glucose (if awake and able, 15-30 gram or food/drink, slower activation), IV glucose (dextrose 50% D50 for adult, D25 for children, D10 for infants)
pituitary tumors
sizing
pathogenesis
macro > 1 cm or micro < 1 cm adenoma
lesion causing compression of optic chiasm or basal portion of brain
pituitary tumors: prolactinoma
pathogenesis, male/female
commonality
treatment
inc. prolactin, female: galactorrhoea and amenorrhea, male: dec libido and headache
most common type of pituitary adenoma
tx with dopamine antagonists or sx
pituitary tumors: GH cell adenoma
levels
symptoms
treatment
inc. GH
gigantism if before epiphyseal closure (F: 12-16, M: 14-19)
acromegaly if after epiphyseal closure (jaw, hands, feet, face)
treat with GH receptor agonist
pituitary tumors: ACTH
causes…
Cushing’s Sydnrome
hypopituitarism
definition
cause
deficient secretion of only one or a few pituitary hormones
caused by tumor
panhypopituitarism
definition
total failure of pituitary function
Sheehan syndrome
definition
pathogenesis
cause
cause of symptoms
pregnancy related infarct of pituitary gland
2x in size but blood supply does not inc.
infarct caused by blood loss and shock during childbirth
symptoms due to loss of gonadatropins, then TSH and ACTH
empty sella syndrome
pathogenesis
disturbance
thin, flat pit. gland secondary to congenital defect or absented diaphragma sella, CSF pressure into sella
minor endocrine disturbance
diseases of posterior pituitary: syndrome of inappropriate ADH (SIADH) secretion
definition
symptom
treatment
ectopic production of ADH by various tumor
water retention with hyponatremia
treat with water restriction
diseases of posterior pituitary: ADH deficiency
results in
symptoms
treatment
results in diabetes insipidus
dehydration, insatiable thirst
treat with ADH analog
Marfan syndrome
connective tissue
thyroid hormone: hypo-
levels
symptoms
dec free T4 inc TSH
cretinism (iodine deficiency), mental retardation, growth impairment, large tongue, big abdomen
thyroid hormone: hypo- … myxedema
who does it affect
symptoms
women
weight gain (dec BMR), lower voice, constipation, physical/mental slowness, puffy, dry skin, brittle hair, hair loss, inc. relaxation stage of deep tendon reflexes
thyroid hormone: hypo- … hashimoto’s
classification
main symptom
HLA-DR5, anti-thyroglobulin and anti-microsomal antibodies
chronic inflammation