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Environmental and Nutritional Pathology
Environmental and Nutritional Pathology
147
Pathology
Graduate
07/10/2012

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Term
Environment
Definition
outdoor, indoor, and occupational environments. The air we breathe, the food and water we consume, and exposure to toxic agents
Term
Our environment is influenced by
Definition
tobacco use, alcohol ingestion, therapeutic and non therapeutic drug consumption, and eit
Term
xenobiotics
Definition
exogenous chemicals in the environment in air, water, food, and soil that may be absorbed into the body through inhalation, ingestion, and skin contact
Term
EPA monitored pollutants (6)
Definition

sulfur dioxide

carbon monoxide

ozone

nitrogen dioxide

lead

particulate matter

Term
the commonest pollutant
Definition

tobaco smoke

also: CO, NO2, and asbestos

Term
Radon
Definition
radioactive gas derived from uranium widely present in soil and in homes can cause lung cancer
Term
environmental pathology
Definition

diseases caused by:

exposure to toxic agents

physical damage

nutritional defieciencies

 

Term
the single largest preventable cause of death in the US
Definition
smoking tobacco
Term
major diseases responsible for mortality in smokers (in order of frequency)
Definition
coronoary heart disease, lung cancer, COPD
Term
major risk factor for MI
Definition
Cigarette smoking
Term
Buerger disease
Definition
inflammatory and occlusive disease of the lower leg vasculature, occurs almost only in heavy smokers
Term
Tobacco causes cancer in other organs (besides lung)
Definition
lip, tonuge, bucal mucosa, larynx, esophagus, carcinoma of the kidney, cancer of the pancreas, uterine cervix cancer and leukemia
Term
non neoplastic diseases (cigarette smoking)
Definition
chronic bronchitis, emphysema, COPD, peptic ulcer disease, osteoporosis, thyroid disease, ocular disease
Term
fetal tobacco syndrome
Definition
infants born to women who smoke during pregnancy are 200 g lighter (not born preterm)
Term
environmental tobacco smoke (second hand smoke)
Definition
20-30% increased risk of lung cancer in spouses of smokers
Term
legal intoxication
Definition
levels above 80 mg/dl
Term
comatose levels of intoxication
Definition
300 mg/dl
Term
death from respiratory failure with alcohol levels
Definition
above 400 mg/dl
Term
Mallory-Weiss syndrome
Definition
alcoholics, violent rethcing may lead to tears at the esophageal-gastric junction
Term
alcohol fx on blood
Definition

megaloblastic anemia due to dietary deficiency of folic acid.

hypersplenism often causes hemolytic anemia

Term
alcohol fx on bone
Definition

postmenopausal females - osteoporosis

male - aseptic necrosis of the head of the femur

Term
alcohol fx on N.S.
Definition

Wernicke encephalopathy - caused by thiamine defienciency

Korsakoff psychosis

cerebellar degeneration

amblyopia

polyneuropathy

 

 

Term
Wernicke encephalopathy
Definition
mental confusion, ataxia, abnormal ocular motility, and polyneuropathy
Term
korsakoff psychosis
Definition
retrograde amnesia and confabulatory symptoms
Term
fetal alcohol syndrome
Definition
growth retardation, microcephaly, facial dysmorphology, neurologic dysfxn
Term
# of deaths from illicit drugs
Definition
17,000 a year in the US
Term
most common complications of drug use
Definition
introducing infectious organisms by a parenteral route
Term
IV drug use complications
Definition

track marks

thrombophlebitis

bacterial endocarditis

pulmonary, renal, and intracranial abscesses

meningitis

osteomyeleits

mycotic aneurysms

Term
IV drug users are at very high risk for
Definition
AIDS, Hep B/C
Term
most complications of oral contraceptives involve
Definition
vasculature or reproductive organs
Term
vascular OC complications
Definition
DVT (higher if also smoke), arterial thrombotic events
Term
neoplastic complications OCs
Definition

tumors of female reproductive organs (ovary, endometrium, and breast)

Squamos carcinoma of the cervix

Term
other complications of OCs
Definition

chloasma

cholelithiasis

Term
aspirin complications
Definition
reyes syndrome
Term
acetaminophen complications
Definition
hepatic necrosis and liver failure
Term
pneumoconioses
Definition
pulmonary diseases casued by mineral dust inhalation
Term
pnemoconioses key factor in causing symptoms
Definition
the capacity of inhaled dusts to stimulate fibrosis
Term
lung lesions produced by inorganic dusts
Definition

over 10 micrometer = removed by mucociliary escalator (good)

smaller particles reach the acini (bad)

Term
simple nodular silicosis
Definition

radiologic diagnosis without significant symptoms.

silicotic nodules 2-4 mm in diamter with a whorled appearance and concentrically arranged collagen

Term
Acute silicosis
Definition

silicotic nodules are not found. diseases progresses rapidly over a few years.

tuberculosis is common.

silicosis does NOT predispose to lung ca

Term
coal workers pneumococoniosis
Definition
due to inhalation of Carbon particles
Term
simple CWP
Definition
nonpalpable coal dust macules and palpapble coal dust nodules. 1-4 mm. nodules consist of dust laden macrophages assd. with a fibrotic stroma. minor lung function impairment
Term
complicated CWP
Definition
lesion 2.0 cm or greater, may cause significant respiratory impairment
Term
caplan syndrome
Definition
rheumatoid nodules (caplan nodules) in the lungs of coal minors with rheumatoid arthritis
Term
exposure to asbestos can cause (6)
Definition
asbestosis, benign pleural effusion, pleural plaques, diffuse pleural fibrosis, rounded atelectasis and mesothelioma
Term
asbestosis
Definition

vilateral, diffuse interstitial fibrosis and asbestos bodies in the lungs.

"honeycomb lung"

dx: must have asbestos bodies AND diffuse interstitial fibrosis in lungs

Term
mesothelioma
Definition
neoplasm of mesothelial cells, more common in the pleura.
Term
lead overexposure
Definition
dyxfxn in N.S, kidneys, hematopoiesis
Term
target of lead toxicity in children
Definition
the brain - lead encephalopathy
Term
lead toxicity in adults
Definition
peripheral motor neuropathy - affects radial and peroneal nerves (wrist/footdrop)
Term
cardinal sign of lead intoxication
Definition

anemia (heme synthesis disrupted)

mycrocytic and hypochromic anemia

prominent basophilic stippling of erythrocytes

Term
lead in children
Definition

increased bone densities at the metaphysis

gingival lead line

Term
principal target of the toxicity of inorganic mercury
Definition
the kidney (brain is damaged by organic)
Term
mercury fx
Definition

chronic nephrotoxicity - long term exposure

neurotoxicity - cerebral and cerebellar atrophy

Term
acute aresenic poisoning
Definition
death due to CNS toxicity
Term
chronic arsenic intoxication
Definition
encephalopathy and peripheral neuropathy, numerous types of Ca
Term
hypothermia
Definition
body temp below 35 C (95 F)
Term
hypothermia can cause
Definition
trench foot or immersion foot, frostbite, gangrene
Term
hyperthermia
Definition
above 42.5 C (108.5 F)
Term
malignant h yperthermia
Definition
hypermetabolic state with muscle necrosis that occurs after anastehsia in susceptible ersons
Term
heat stroke
Definition
high ambient temperatures. impaired regulatory cooling responses
Term
most common form of localized hyperthermia
Definition
cutaneous burns
Term
full thickness cutaneous burns
Definition
char epidermis and dermis, cellular structure is lost
Term
partial thickness burns
Definition
mild sunburn, congestion and pain but no necrosis, edema, blisters
Term
contusion
Definition
localized mechanical injury with focal hemorrhage
Term
abrasion
Definition
skin defect caused by crushes or scrapes
Term
laceration
Definition
split or tera of the skin
Term
wounds
Definition
mechanical disruptions of tissue integrity
Term
non ionizing radiation
Definition
UV and infrared light, microwave, sound waves
Term
Rad range no obvious fx
Definition
10-50 rad
Term
acute radiation syndrome
Definition
100-350 rad
Term
severe symptoms of acute respiratory distress (50% die within one month
Definition
350-550 rad
Term
all die within days (rads)
Definition
1000 rad
Term
25% of ionizing radiation received by the US population is from
Definition
medical devices and radioisotopes
Term
used in the treatment of Ca, imaging, therapeutic or diagnostic radioisotopes
Definition
ionizing radiation
Term
long term fx of ionizing radiation
Definition
fibrosis, mutagenesis, carcinogenesis, teratogenesis
Term
radiation fx at the cellular level
Definition
1.somatic fx associated with acute cellular killing and 2. genetic damage
Term
radiation damage to the DNA of a long lived nonproliferating cell
Definition
does not necessarily impair its fxn
Term
radiation damage to short lived proliferating cell tissues with a high rate of cell division
Definition
extremely vulnerable to radiation
Term
pathologic features of radiation
Definition
compromise of vascular supply
fibrotic repair rxn to acute necrosis and chronic ischemia
Term
non neoplastic fx of radiation (acute)
Definition
pneumonitis, cystitis, dermatitis, and diarrhea
Term
non neoplastic fx of radiation (chronic)
Definition
interstitial fibrosis, pulmonary fibrosis, strictures in esophagus and small intestine, sterility, congenital malformation, cataracts
Term
radiation induced cancers
Definition
osteogenic sarcoma, skin, thyroid, lung, leukemia, breast, angiosarcoma of the liver
Term
an appropriate diet should provide
Definition
sufficient energy (carbs, fats, proteins), amino acids and fatty acids for building blocks, vitamins and minerals as coenzymes or hormones
Term
primary malnutrition
Definition
one or all of the components are missing from the diet
Term
secondary malnutrition
Definition
supply of nutrients is adequate, but malnutrition results from insufficient intake, malabsorption, impaired utilization or storage, excess loss, or increased need for nutrients
Term
marasmus
Definition
a deficiency of calories from all sources
Term
kwashiorkor
Definition
malnutrition in children caused by a diet deficient in protein alone
Term
marasmus pathological features
Definition
low weight, low subq fat, protuberant abdomen, muscle wasting, wrinkle face, growth failure, lipfuscin in visceral organs, may be alert, NO EDEMA
Term
kwashiorkor patholgical features
Definition
generalized growth failure, subq fat is normal, apathy, edema, hepatomegaly, ascites, "flaky paint", "flag sign" lipid accumulation
Term
anorexia nervosa endocrine fx
Definition
amenorrhea, cold intolerance, bradycardia, constipation, osteoporosis, anemia, lymphopenia, hypoalbuminemia, changes in skin and hair
Term
highest death rate of any psychiatric disorder
Definition
anorexia nervosa
Term
major complication of anorexia nervosa and bulimia
Definition
increased susceptibility to cardiac arrhythmia and sudden death from hypokalemia
Term
normal BMI
Definition
25 kg/m2
Term
overweight BMI
Definition
25-29.9
Term
obese BMI
Definition
greather than 30
Term
morbid obesity BMI
Definition
greater than 40
Term
most abundant and potent stimulator of feeding
Definition
neuropeptide Y
Term
low serum leptin levels
Definition
increase appetitie and decrease energy expenditure
Term
obesity complications (endocrine)
Definition
type 2 DM, high LDL, infertility, dyslipidemia, dyslipoproteinemia
Term
obesity complications (CV)
Definition
hypertension, coronary heart disease, congestive heart failure, thromboembolic disease
Term
obesity complications (neurologic)
Definition
ischemic strokes
Term
obestiy complications (pulmonary)
Definition
major risk factor for obstructive sleep apnea, obesity-hypoventilaity syndrome, Pickwickian syndrome
Term
fat soluble vitamins
Definition
a, d, e, k
Term
Vitamin A fxn
Definition
skeletal maturation, maintenance of epithelial linings and cell membrane structure. constituent of the photosensitive pigments in the retina
Term
Forms of vitamin A
Definition
retinoids (fish liver)
beta carotene (plants leafy green veggies)
Term
Vitamin A deficiency
Definition
squamos metaplasia, especially in glandular epithelium. common in trachea and bronchi and bronchopneumonia is a frequent cause of death. kidney stones. xerophthalmia, keratomalacia, blindness, follicular hyperkeratosis
Term
earliest sign of vitamin a deficiency
Definition
diminished vision in dim light
Term
hypervitaminosis A
Definition
hepatosplenomegaly, portal hypertensions, bone pain, alopecia
Term
Vitamin D forms
Definition
D3 (cholecalciferol produced by the skin) and D2 (ergocalciferol produced by plant)
Term
Vitamin D activation
Definition
must be hydroxylated to active metabolite in the liver and kidney
Term
Vitamin D deficiency (etiology)
Definition
insufficiency dietary vitamin d. insufficient production in the skin. inadequate vitamin d absorption from the diet. abnormal conversion of vitamin d to its bioactive metabolites
Term
vitamin d deficiency (pathology)
Definition
osteomalcia (soft bones) in adults
rickets in children - pectus carinatum and rachitic rosary chest
Term
hypervitaminosis D
Definition
hypercalcemia - nephrolithiasis or nephrocalcinosis, ectopic calcification in other organs
Term
vitamin E dietary deficiency
Definition
occurs in children as a result of mutations in the alpha tocopherol transfer proteins, and in adults with malabsorption syndromes
Term
Vitamin k forms
Definition
K1 from plants
k2 synthesized by the normal intestinal bacteria
Term
vitamin k deficiency (pathology)
Definition
fat malabsorption, destruction of intestinal flora, newborn infants
Term
vitamin k is important for
Definition
prothrombin, factor VII, factor IX, factor X
Term
vitamin k deficiency
Definition
can lead to catastrophic bleeding
Term
B1 name
Definition
thiamine
Term
B1 fxn
Definition
cofactor for enzymes crucial to energy matabolism
Term
B1 deficiency sx
Definition
polyneuropathy, edema, cardiac failure, dry beriberi, wet beriberi
Term
dry beriberi
Definition
neuromuscular, paresthesias, hyporeflexia, weakness, muscle atrophy in extremities
Term
wet beriberi
Definition
cardiac failure, edema, severe congestive heart failure
Term
thiamine deficiency in chronic alcoholics
Definition
CNS involvement (wernicke syndrome) with progressive dementia, ataxia, and ophthalmoplegia. Korsakoff syndrome (thought disorder)
Term
most reliable test for thiamine deficiency
Definition
immediate and dramatic response to parenteral administration of thiamine
Term
B2 name
Definition
riboflavin
Term
B2 deficiency
Definition
lesions of facial skin and corneal epithelium.
cheilosis, seborrheic dermatitis, corneal interstitial keratitis
Term
B3 name
Definition
Niacin
Term
B3 deficiency
Definition
pellagra - dermatitis, dementia, diarrhea, death. scaly dermatitis @ areas exposed to light and subjeted to pressure. glossitis
Term
B6 name
Definition
Pyridoxine
Term
B6 fxn
Definition
coenzyme in numerous metabolic pathways including those related to amino acids, lipids, heme, and neurotransmitters
Term
B6 pathology
Definition
diseases in the CNS, seizures in infants, adults - polyneuritis and anemia
Term
B12 name
Definition
Cyanocobalamin
Term
B9 name
Definition
Folic Acid
Term
B12 or B9 pathologies
Definition
megaloblastic anemias (impaired DNA synthesis)
Megaloblastic anemia (large RBC)
Term
B12 deficiency path
Definition
pernicious anemia (lack of secretion of IF), previous gastric surgery, parasitization of the small intestine
Term
present in B12 deficiency but not folic acid deficiency
Definition
neurological manifestations
Term
Vitamin C name
Definition
Ascorbic Acid
Term
Vitamin C deficiency
Definition
Scurvy, abnormal collagen that lacks tensile strength, poor wound healing, petechial hemorrhages
Term
essential trace elements are mostly components of
Definition
enzymes and cofactors
Term
chronic zinc deficiency
Definition
hypogonodal dwarfism in boys
Term
dietary copper deficiency
Definition
mycrocytic hypochromi anemia, leucopenia, and skeletal defects (wilsons disease)
Term
most common cause of anemia worldwise
Definition
iron deficiency
Term
iron excess pathology
Definition
mycrocytic hypochromic anemia
Term
manganese deficiency
Definition
poor growth, skeletal abnormalities, reproductive impairment, ataxia, convulsions. symptoms similar to parkinsonism
Term
iodine deficiency
Definition
hypothyroidims because maintenance of normal thyroid hormone depends on adequate dietary iodine - goiter
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