Disease States I Flashcards
multi-system inflammatory disease of unknown etiology causing interstitial lung disease
sarcoidosis
MC lung, lymph node, eyes, skin
sarcoidosis causes which specific forms of pulmonary disease
pulmonary fibrosis
hilar lymphadenopathy
sarcoidosis pathophysiology
exaggerated immune response
develop non-caseating granulomatous disease
sarcoidosis epidemiology
MC in AA, women
AA disease tend to be more severe and unremitting
sarcoidosis clinical presentation
DOE, cough, chest pain
+/- fever, arthralgia, anorexia
systemic clinical manifestations of sarcoidosis
pulmonary
cutaneous
ocular
endocrine
pulmonary manifestations of sarcoidosis
hilar lymphadenopathy
interstitial lung dz
pulmonary HTN
cutaneous manifestations of sarcoidosis
erythema nodosum
skin plaques
panniculitis
violet rash on cheeks, nose
ocular manifestations of sarcoidosis
uveitis (can cause blindness)
endocrine manifestations of sarcoidosis
hypercalcemia
erythema nodosum
skin manifestation of sarcoidosis
large red indurated nodule on extremities
diagnostic study used for sarcoidosis
CXR (shows the granules)
HRCT can be used to identify active alveoli’s or fibrosis
lab eval of sarcoidosis
LFT’s
dihydroxy vitamin D levels
ACE levels
sarcoidosis dx is confirmed by
BIOPSY of lung or lymph tissue
shows non caveating granulomas w/o fungus or TB
sarcoidosis stage I
hilar or mediastinal lymphadenopathy only
45-65% of pts @ diagnosis
stage II sarcoidosis
lymphadenopathy and parenchymal disease
infiltrates
stage III sarcoidosis
parenchymal disease (infiltrates only)
sarcoidosis treatment
given to pts with pulmonary disease - oral corticosteroids over 6 months
NSAIDS for symptomatic relief
sarcoidosis prognosis
2/3 remit w/in 10 yrs
important prognostic indicator is staging of dz on CXR
etiologies of restrictive lung disease
Pleural (trapped lung, empyema) Alveolar (edema, hemorrhage Interstitial (pulmonary fibrosis) Neuromuscular (myasthenia gravis, ALS) Thoracic cage abnormalities (obesity)
restrictive lung disease results when
poorly compliant chest wall
muscles expand chest wall too weak to create normal neg pressure
pulmonary tissue is poorly expandable
alveoli have poor ability to exchange O2
ventilation
test used to diagnose lung disease
PFT’s
decreased total lung capacity
restrictive lung disease PFT
Low lung volumes but normal FEV1/FVC ratio
restrictive lung disease and diffusion capacity PFT
DECREASED DLCO = interstitial lung disease
NORMAL DLCO - neuromuscular, thoracic cage, pleural etiology)
interstitial lung disease
diffuse inflammation of the lung causing scaring and thickening of tissue between alveoli and capillaries
RESTRICTIVE + DECREASED diffusion
patho of interstitial lung disease
injury to lungs (aspiration, smoke, dust) that doesn’t heal properly
patchy replacement of normal tissue with scar tissue and fibroblasts
end result of ILD
pulmonary fibrosis due to chronic inflammation
etiologies of ILD
long term exposure to toxins and pollutants
connective tissue diseases
medications and radiation
ILD presentation
varied
dry cough > 6 months
DOE progressing to DOR
diagnosis of ILD – suspect then order
history (insidious onset, chronic symptoms)
PE (systemic signs of pulmonary dz - clubbing)
pulmonary function testing (restrictive and DLCO decreased)
+ lab testing, imaging, lavage/bx
lab testing ILD
arterial blood gas (hypoxemia)
testing for specific etiology
imaging ILD
HRCT STUDY OF CHOICE
shows fibrosis
bronco-alveolar lavage
lund tissue biopsy
suggests severity, confirms diagnosis
management of ILD
treat underlying dz, pulmonology
steroids/immunomodulators
prompt tx of infection
oxygen
pneumoconioses
collection of interstitial lung diseases caused by occupational exposure to inorganic mineral dust
MC type is asbestosis
when to consider pneumoconiosis
history, exam, and diagnosis of ILD with occupational exposure risk
imaging and pneumoconiosis
involvement of upper lobes of lungs
** except asbestosis
Black lung
coal workers lung
due to coal/dust exposure
upper lobes show coal macule –> fibrosis
silicosis
upper lob opacity, EGGSHELL clarifications of lymphnodes
ex. stonemason/sandblasting