Pathology Flashcards
Lining Epithelium of respiratory system ?
Pseudostratified, ciliated columnar epithelium
Vocal cords lining epithelium ?
Stratified squamous
Cells of alveoli with functions ?
Type 1 pneumocytes (95%) : flat cells
Type 2 : globular, surfactant, promotes healing
Define emphysema?
Irreversible
Distal to terminal epithelium ( acinus )
Fibrosis in emphysema ?
No
Pathogenesis of emphysema?
Smoking/A1AT deficiency
Increased elastase activity
Destruction Of lung architecture
Types of emphysema
Centrilobular/centriacinar
Panacinar
Paraseptal/distal
Irregular
Emphysema associated with spontaneous pneumothorax?
Paraseptal/distal
Tell locations of emphysemas ?
Upper lobe : centriacinar
Lower lobe : panacinar
Type of inheritance in A1ATD?
AR(ch.14)
A1ATD clinical features?
Lungs: panacinar emphysema
Liver : cirrhosis (pas+)
Normal vs diseases A1ATD?
PiMM : N
PiZZ : diseases
Floating septa seen in ?
Emphysema(broken alveolar wall )
C/f of emphysema?
Pink puffers
Barrel chest
Pursed lip breathing
Flattened diaphragm
Define chronic bronchitis?
Persistent productive cough for at least 3 consecutive months for 2 consecutive years
Pathogenesis of chronic bronchitis?
Smoking
Mucosal irritations
Increased mucus
Increased reid index
Productive cough
Increased infections
Reid index normal value and in CB?
Normal : 0.4
Increased in chronic bronchitis
Normal in asthma
Blue bloaters and cough : dx?
Chronic bronchitis
Bronchial asthma genes, cytokines,cells,HSRx,earliest mediator?
Type 1 HS
Cells: mast and eosinophils
Cytokines IL4,IL5
Earliest mediator: histamine
Genes for atopy: ch 5
Genes : IL13,ADAM33
Sputum of asthma ?
3Cs :
Curshman spirals (whorled mucus plugs)
Creola bodies
Charcoat leyden crystals (eosinophils) galectin 10
Sputum of asthma ?
3Cs :
Curshman spirals (whorled mucus plugs)
Creola bodies
Charcoat leyden crystals (eosinophils) galectin 10
Airway changes in asthma ?
Increased thickness
Eosinophils & mast cells in lamina propria
Smooth muscle hyperplasia
Submucosal gland hyperplasia
Etiology of bronchiectasis?
Congenital : kartagener & CF
Aquired : foreing body, tumours, infections
Triad of kartagener syndrome ?
Situs inversus
Bronchiectasis
Sinusitis
Defect in kartagener syndrome ?
Dyeinin arm of cilia
C/f of immotile cilia syndrome ?
B/L lower lobes
Productive cough
Dyspnea
Complications of primary cilia dyskinesia?
Sepsis
Empyema
Lung abscess
Brain abscess
Amyloidosis(AA)
Gross finding of bronchiectasis?
Probe reaches pleura
Which pneumoconiosis affects upper lobe & lower lobes?
CWP & Silicosis : upper lobes
Asbestosis : lower lones
Pneumoconiosis risk factors?
Particles size
Particle solubility
Duration
Synergistic factors (smoking)
Most pathogenic risk factors for pneumoconiosis?
0-5 micron size
Caplan syndrome?
CWP/Silicosis + Rheumatoid arthritis
C/f of CWP?
Asymptomatic anthracosis
Simple CWP (coal macule,coal nodule)
Progressive massive fibrosis
Most common pneumoconiosis?
Silicosis = grinder disease
Egg shell calcification seen in
Silicosis on CXR due to LN enlargement
Silicosis associated with increased risk of
TB
Lung cancer
Histopathology of silicosis?
Whorled collagen bundles
Gross of silicosis?
Silicotic nodule
Collagenous scar
Polarized microscopy of silicosis?
Birefringent silical particle