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139 Cards in this Set
- Front
- Back
two patterns for acute lung injury
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Diffuse alveolar damage
• Organizing pneumonia |
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what are hyaline membranes made from
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composed of dead cells
(nucleoplasm, cytoplasm, fibrin) |
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DAD organizing phase vs. pneumonia
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myofibroblasts and fibroblasts but no hyaline membranes in pneumonia
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dad review
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just for review
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when do hyaline membranes peak in DAD, when fibrosis start
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both day 2
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"strange' cause of DAD
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connective tissue dz
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boop vs. pneumonia
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pneumonia - note fibroblastic foci is branching, new and distal
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what, clinical term, pathology term, how much of lung, how treat
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UIP (idiopathic pulmonary fibrosis for clinicians), diffuse bilateral, temporal and geographic heterogeneity,
bad prognosis, NOT steroids, transplant in young patients |
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where is UIP most often found
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Periphery of lung and lower lobes
-subpleural, paraseptal |
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variation in fibrosis in UIP
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Dense fibrosis with remodeling and usually honeycombing
Fibroblastic foci at edge of fibrosis |
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what
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UIP
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histologic fx of NSIP
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Uniform septal thickening
Usually no honey combing/architectural distortion Fibrotic and cellular patterns |
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causes of NSIP
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CVD, drugs, infection, pneumoconiosis
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what
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cellular phase of NSIP - expansion by plasma cells and lymphocytes
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what
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fibrotic phase of NSIP
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how to think of DIP
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DIP (smoking!)
think of primarily alveolar filling (with smoker's macs) and secondary interstitial fibrosis (uniformly, thick) |
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what
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DIP
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what is hamman-rich syndrome
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AIP (aka organizing DAD), complete white out by CXR
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cf LIP with cellular NSIP
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more dense inflammatory infiltrate
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what to associate with LIP
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Assoc with HIV, CVD (Sjögren’s syndrome) , EBV, Pneumocystis
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what are you at risk for developing with LIP
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small% extranodal marginal zone lymphoma
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what
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LIP
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new name for BOOP
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COP
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when get COP
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often 4-6 weeks post viral URI
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ground glass opacities think
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COP
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pathologic findings of COP
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Patchy airway centered fibrous polyps of organizing
pneumonia |
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what
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COP
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for collagen vascular dz what histologic lung patterns of injury do you most see
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NSIP>UIP
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if see Follicular lymphoid hyperplasia – think
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Sjögren’s syndrome
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what
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think: sjogren's syndrome, follicular lymphoid hyperplasia
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acute hypersensitivity pneumonitis - what type of hypersensitivity
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type III
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chronic hypersensitivity pneumonitis
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type IV hypersensitivity
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histologic fx of hypersensitivity pneumonitis
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Bronchiolocentric interstitial lymphoplasmacytic infiltrates
– Poorly formed interstitial granulomas – Organizing pneumonia – Chronic bronchiolar inflammation with peribronchiolar metaplasia (Lambertosis) |
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causes of eosinophilic pneumonia
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1. loeffler's - allergic
2. Churg-strauss - if vasculitis, asthma 3. acute idiopathic if unknown (wiht DAD) |
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two diffuse alveolar hemorrhage syndromes
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wegener's and goodpastures
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what is granulomatosis with polyangiitis
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wegener's
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triad for wegener's pathologically
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Vasculitis, granulomas and geographic necrosis
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what is the cANCA in wegener's against
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serine proteinase-3
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response of wegener's to steroids
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great response, fatal if untreated
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what
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diffuse alveolar hemorrhage syndrome (wegener's vs. goodpastures
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presentation of someone with goodpasture's
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young male, hemoptysis
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test for goodpasture's
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DIF alveolar septal basement
membranes with IgG and complement (anti alveolar BM antibodies; linear staining) |
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pseudomonas - micro fx
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Gram-negative, motile (polar flagellum), strictly
aerobic, oxidase positive, respiratory metabolism NOT fermentative |
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three clinical settings for pseudomonas
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steroids,
– Cystic fibrosis – Contaminated respiratory equipment |
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good stain for nocardia
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Partial acid-fastness (Ziehl-Neelson+)
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atypical pneumonias: two
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mycoplasma, chylamydia
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how does mycoplasma attach to ciliated resp epithelium
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P1
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consequence of mycoplasma pneumonia
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development of cold agglutinins to I rbc antigen
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how does chylamydia get into to cells
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attaches through elementary body
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how acquire C. psittaci
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bird droppings (parakeet)
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CMV - dna, rna?
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ds DNA
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which HSV (1 or 2) is GU, which is respiratory
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HSV1 - respiratory
HSV2 - GU |
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clinical findings for measles
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1-2 wk incubation, then fever, Koplik’s spot, giant cell pneumonia
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if see giant cell pneumonia think:
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RSV or measles
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what type of giant cells are seen with measles
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Warthin-Finkeldey cells
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adenovirus: DNA, RNA, ds or ss
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ds DNA virus (nonenveloped)
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pulmonary pattern for adenovirus
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bronchiolitis (can be severe, necrotizing)
pneumonitis |
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what is in walls of mycobacterium TB
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mycolic acid
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what is Ranke’s complex
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calcified hilar nodes + GHon complex
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mechanism of entry of TB
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Alveolar bacilli are ingested by neutrophils and
macrophages - macrophages may go to regional lymph nodes |
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compare granulomas of Wegener's vs. TB
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those of TB tend to be more round, no vasculitis too
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use for auramine-rhodamine IF
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to identify TB
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where see MAI most commonly in lungs
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middle lobe (hard to get secretions out, lady windemere)
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association with MAI
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hot tubs
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where are granulomas found in MAI
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airway baesd granulomas
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findings in Allergic bronchopulmonary aspergillosis
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Tide mark lines
– Collections of eos – Mucous – Charcot-Leiden crystals |
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what
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since often too small to see on H&E, here's what to look for:
Intra alveolar macrophages and hob nailed pneumocytes Intracellular (exist in macrophages) may see round necrotizing granulomas |
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clinical setting for cocciodiodes
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40% have flu-like illness for 1-3 wks
– 20% have erythema multiforme or erythema nodosum |
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clinical setting for blastomyces
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likes to disseminate to skin and bone but can go to lung
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clinical setting for cryptococcus
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lung, hematogenous to cerebromeningeal
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new name for P carinii
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Pneumocystis jirovecki
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histol fx for pneumocystis
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Intra-alveolar frothy material with minimal inflammation
– GMS stains show 7-8 micron non-budding cysts – Dented ping-pong balls – Some with central black dot – PAS negative |
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what does Peudoallescheria boydii look like histologically
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like actinomyces
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what does Peudoallescheria boydii cause clinically
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Associated with allergic bronchopulmonary
disease |
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three forms of toxo
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– Tachyzoite (invasion, proliferation)
– Tissue cyst (reservoir for tachyzoites) - cat is reservoir – Oocyst (infectious after sporulation) |
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what to think of
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acute necrotizing pneumonia - toxo
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what
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bag of jelly beans, toxo
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what
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filiform larva of strongyloides
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what
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Protoscolices containing teeth-like hooklets - ecchinococcus
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where find echinococcus
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liver in adults
lungs in kids |
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what associated with Michaelis-Gutman bodies in lungs
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Rhodococcus equi
Aerobic Grampositive/ variable coccobacillus |
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what stain can be used for michaelis-gutman bodies
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mineralization stain - von Kossa
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host and vector for Bartonella quintana or hensalae
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Cat is common host; transmission by flea,
Ctenocephalides felis |
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useful stain for bartonella spp
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warthin-starry (gram neg rods)
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causes of secondary pulmonary hypertension
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Obstructive or interstitial lung disease
– Heart disease – Recurrent thromboemboli |
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in whom is PPH seen and what is the underlying problem
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young to middle age women, endothelial dysfunction
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specific fx in scope on PPH
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Plexiform lesion (anastomosing vessels)
– Angiomatoid lesion (plexiform+dilation) – Necrotizing arteritis applicable to both primary and secondary causes: smc proliferation in intima and media |
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what is Capillary hemagiomatosis
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prominence of septal vessels
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what, in whom, syndromic association, family of tumors
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LAM
Cystic lung disease with numerous cysts lined by plump smooth muscle cells young women TS, PEComa |
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another name for eosinophilic granuloma
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langerhans cell histiocytosis X
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association for eosinophilic granuloma in adults
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smoking, DIP
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what
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eosinophilic granuloma (LCH)
*Stellate centrilobular scar with eosinophils and Langerhans cells (coffee bean shape, grooves) |
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causes of alveolar proteinosis
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-congenital (surfactant defect)
- inhale dusts - problems with GM-CSF (where Macs can't consume surfactant and it accumulates) |
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what, ddx (how distinguish)
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pulmonary alveolar proteinosis
No small dots as seen in pneumocystis PAS+, unlike pneumocystis |
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name, assoc/cause
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lipoid pneumonia, aspiration
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noncaseating granulomas: two prominent ddx
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sarcoid
berylliosis |
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two findings in sarcoid
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asteroid bodies
schaumann bodies note granulomas usu around bronchovascular bundle |
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what is a type I hypersensitivity in lung
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asthma
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causes
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bronchiectasis;
causes CF, Kartagener's (lack dynein arms on cilia) |
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which emphysema is found where
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centrilobular: bronchi-centered, upper lobes
panacinar: diffuse, lower lobe predominant |
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when clinical sx worse than path, what to consider
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constrictive bronchiolitis (often just a little fibrosis or a little inflammation)
can get an obliterated bronchus |
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what, location, ihc
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inflammatory myofibroblastic tumor
Bland spindle cells, inflammatory cells and collagen usu. endobronchial sma, alk in 40% |
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two additional names for sclerosing hemangioma
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pneumocytoma and sclerosing epithelioma
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cell of origin of a sclerosing hemangioma
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Tumor of primitive respiratory epithelium, not
vascular tumor (not hemangioma) |
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what
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sclerosing hemangioma
Type 2 pneumocytes (hobnailing) line the surface of papillary structures with underlying round cells |
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staining pattern for cells of sclerosing hemangioma
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Surface epithelial cells (hobnailed cells)
keratin +, EMA+ TTF1+ – Round cells (bland cells): keratin -, EMA +, TTF1+ |
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molecular targets in lung ca
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EGFR, drug (cetuximab, gefitinib, erlotinib),
– Non smokers, women, asian EML4-ALK (crizotinib), young non-smokers VEGF, drug (avastin, ect) HER2, drug herceptin KRAS, smokers BRAF |
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what to test for molecularly in lung ca
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EGFR and ALK if adenoca component
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ihc for lung scca
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p63+, CK5/6+, 34βe12 +, CK7+, CK20-
TTF1- |
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is lung scca a/w EGFR mutations
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no
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ihc for lung adenoca
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TTF1+, napsin+, mucin+ CK5/6 -
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if adenoca in lung and egfr mutation, think:
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women, nonsmoker, asian
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if adenoca lung with alk mutation, think:
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young, nonsmoker
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what does atypical adenomatous hyperplasia lead to (<5mm)
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adenoca precursor (call it a BAC if >5mm)
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does mucinous BAC have egfr mutations
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nope, and worse prognosis
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mits and necrosis for neuroendocrine tumors of lungs
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carcinoid <2 mits/10 hpf, no necrosis
atypical 2-10 mits, necrosis small and large cell >10/10 mits, lots of necrosis, just cell size dependent at that point |
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fx of acute rejection
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Changes in alveoli
– Intraparenchymal perivascular mononuclear infiltrates – More PMNs, eos and macrophages as disease develops – Endothelialitis |
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fx of grade b rejection in lung
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Lymphcytic bronchiolitis
– Combined large and small airway inflammation |
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fx of grade C rejection in lung
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chronic Chronic airway rejection
– Bronchiolitis obliterans |
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fx of grade d rejection
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chronic vascular rejection
Fibrointimal thickening of arteries and veins |
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SFT ihc
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CD34, Bcl-2, CD99
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what
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SFT
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ihc for mesothelioma
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calretinin (cyto and nuclear),
CK 5/6, thrombomodulin, WT-1 (nuclear) Sarcomatoid mesothelioma loss of these antigens – may only be calretinin + |
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Types of asbestos
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– Serpentines – curly flexible fibers
1) Chrysotile – most U.S. asbestos 2) Less pathogenic – Amphiboles – straight stiff fibers 1) More pathogenic 2) Amosite, crocidolite |
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association aspergillus?
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adenoca
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fx of legionella pneumonia
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alveolar exudates of PMNs, macrophages
with fibrin +/- hyaline membranes. Dieterle stain - small intra/extracellular coccobacillary organisms (Gram - ) |
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appearance: Pseudomonas pneumonia –
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acute necrotizing vasculitis
|
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Allergic pulmonary Aspergillosis histology
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bronchocentric granulomas
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see giant cell pneumonia, think
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measles
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two imp't facts about lung scca
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most associated with hypercalcemia
TTF1- |
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lung ca most a/w paraneoplastic syndromes
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small cell ca
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know the gross fx of chondroid hamartoma
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see epithelial clefting
|
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fx and ihc of sft
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SFT, pleural pedunculated plaque, patternless pattern and staghorn
vessels CD34/CD99/BCL-2 + |
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most common site of a plasmacytoma
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upper respiratory tract
|
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clear cell sarcoma a/w
|
ts and lam
|
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ihc for mesothelioma
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+ for calretinin and CK5/6+,- for CEA/EMA/LeuM1
|
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Definition of Good Pastures
|
antibodies
to antigens in basement membrane |
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where find centrilobular emphysema
|
upper lobes
and upper potions of lower lobes |
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what
|
anthrasilicosis - coal mine lung
|