EOSINOPHLIC LUNG DISEASES
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1 EOSINOPHLIC LUNG DISEASES
2 A wide spectrum of infiltrative lung diseases characterized by infiltration of lung parenchyma with eosinophils and/or peripheral blood eosinophilia.
3 How is the diagnosis made? Clinical and radiological features along with laboratory investigations : BAL and peripheral blood eosinophilia. BAL <2% eosinophils - normal 2-25% - non specific conditions >25% - IAEP >40% - ICEP Peripheral blood eosinophilia > 1000/mm 3 (>1500/mm 3 )
4 Classification Eosinophilic Lung Diseases of Undetermined Cause : - ICES, IAES - Chrug-strauss syndrome, IHES. Eosinophilic Lung Diseases of Determined Cause : - TPE, Loffler s syndrome, other parasites. - ABPA, Bronchocentric Granulomaosis, other fungi. - Drugs/ Toxins/ Radiation. Miscellaneous : - Asthma, Eosinophilic bronchiis, IPF, Sarcoidosis, Lung transplantation, Prarneoplastic eosinophilic pneumonia.
5 ICEP -F > M years. - H/o of asthma / atopy / chronic rhinitis or sinusitis. - Non smokers.
6 Clinical Features Mean interval between onset of symptoms and diagnosis is 4 months - Cough ( dry, later on productive ). - Dyspnoea. - Chest pain. - Fatigue, malaise, fever, night sweats, weight loss. - Wheeze / Crackles.
7 Laboratory Investigations CXR - B/l non migratory peripheral opacities. - Photographic negative of pulmonary edema (25%). - Ground glass to consolidation. HRCT - B/l peripheral alveolar opacities. - Septal thickening/ atelectasis / small pleural effusions / mediastinal lymphadenopathy
8 BLOOD TLC, ESR. Total IGE >1000 IU/ml. AEC >5500/mm 3. BAL >40% eosinophils. PFT obstructive / restrictive.
9 Treatment Mainstay of treatment is Corticosteroids. 1 mg/kg/d for 2 weeks, then tapering over 4 6 weeks. Symptoms improve in 2 weeks and CXR clear in 2 months. Relapse rate is 80% after stopping of treatment. Relapse respond well to Corticosteroids resumption.
10 IAEP - M > F years. - H/o of respiratory exposure to dust, initiation of tobacco smoke
11 Clinical Features - Acute onset ( <7 days or 7 31 days ). - Cough. - Dyspnoea. - Chest pain, myalgia, fever. - Tachypnoea. - Tachycardia. - Crackles.
12 Laboratory Investigations 1.BLOOD - Lack of pulmonary blood eosinophilia. TLC, ESR. IgE > 1000 IU/ml. 2.BAL - 25% EOSINOPHILS ( %). 3.PFT Restrictive. Severe hypoxemia ( PaO2/FiO2 < 300 mmhg)/( PaO2/FiO2 < 200 mmhg ).
13 CXR - B/l alveolar and interstitial peripheral opacities. - Ground glass and micronodular. CECT - B/l alveolar and interstitial opacities. - Poorly defined nodules along bronchovascular. prominence - Septal thickening.
14 Treatment Role of corticosteroids is unconfirmed, may recover spontaneously. Initial bolus dose of Methyl Predinosolone mg 6 hrly then oral Predinosolone mg/d for 2 4 weeks, tapering over few weeks. Complete recovery, no relapse
15 Diagnostic criteria for IAEP 1. Acute onset. 2. B/l diffuse infiltrates on CXR. 3. PaO2 < 60 mmhg or SpO2 < 90% or PaO2/FiO2 < 300 mmhg. 4. BAL > 25% Eosinophils. 5. Absence of any determined cause.
16 Chrug - Strauss Syndrome Eosinophilic granulomatous inflammation involving the respiratory tract and necrotizing vasculitis of medium and small sized vessels along with asthmas and peripheral blood eosinophilia. -M > F years. - H/o of asthma (severe and corticosteroid dependant ) / rhinitis / relapsing paranasal sinusitis / polyps.
17 Clinical Features - Cough, dyspnoea, wheezing - Weight loss, myalgia, arthralgia - Extra pulmonary manifestations Cardiac M.C. cause of death CNS, GIT, Renal, Skin
18 Laboratory Investigations 1. BLOOD TLC, ESR. IGE > 1000 IU /ml. AEC > 1500/mm 3. p-anca. 2. BAL > 60 % eosinophils. 3. PFT early stage - obstructive. later stages - restrictive.
19 CXR - Normal or b/l peripheral migratory and transient pulmonary infiltrates. - B/l non- cavitating nodular opacities. HRCT - B/l peripheral migratory & transient pulmonary infiltrates. - Septal thickening. - Hilar or mediastinal lymphadenopathy. - Bronchial wall dilation.
20 B/l pulmonary infiltrates
21 B/l ground glass opacities
22 Diagnostic Criteria 1. H/o Asthma. 2. PBE > 1500 / mm Systemic vasculitis > 2 extra pulmonary organs. 4. p-anca. 5. Skin, nerve, muscle biopsy ( Lung biopsy is not recommended )
23 Treatment Corticosteroids - Initial bolus dose of methyl Prednisolone - 15 mg/kg/d for 3 days. - Than 1 mg/kg/d for several weeks with tapering over 1 year. FIVE FACTOR SCORE ( poor prognosis ) - Renal, cardiac, CNS, GIT, mild to moderate relapses Use of following drugs is recommended - Cyclophosphamide, Azathioprine, s.c. IFN- gamma, CyclosporineA
24 IHS Heterogeneous group of disorder characterized by multiorgan eosinophilic infiltration an end organ damage without any underlying cause. -M > F years.
25 Clinical Features - Cough, dyspnoea, fever, malaise, fatigue. - Extra pulmonary manifestations Cardiac, CNS, Skin.
26 Laboratory Investigations 1. BLOOD - TLC, ESR, IgE. 2. BAL - Mild. 3. PFT - Restrictive. AEC > 1500/mm3 for at least 6 months or death before 6 months. LAP, Serum vit B 12, Hypergammaglobinemia, ILK.
27 CXR - B/l transient pulmonary infiltrates. CECT - B/l transient pulmonary infiltrates. - Small nodules.
28 Diagnostic Criteria 1. Severe PBE (> 1500/mm 3 ) for at least 6 months or death before 6 months. 2. Absence of any other cause. 3. Multi organ dysfunction.
29 Treatment 1. Eosinophilia without endorgan dysfunction observation. 2. With organ damage - Prednisolone( 1 mg/kg/d ) for weeks than tapering over 1 year 3. If diseases progresses - Add Hydroxyurea ( g/d ) 4 Refractory causes : IFN alpha, Imatinib, Vincristine, Anti-IL5monoclonal Ab.
30 Tropical Pulmonary Eosinophilia - Caused by filarial parasites - Wucheria Bronchofti and Brugia Malayi. - Hypersensitivity reaction to Microfilarial antigens. -M > F years.
31 Clinical Features - Dry cough without dyspnoea (90%). - Dry cough with dyspnoea (45%). - Mucopurulent sputum (40%). - Fever, anorexia, weight loss. - Wheeze.
32 Laboratory Investigations 1.BLOOD - TLC, ESR,IGE. - AEC > 3000/mm 3. - Absence of microfilaria in blood and sputum. - Specific filarial IgE, IgG. 2.BAL - Eosinophils. 3. PFT - Obstructive ( when presents in < 1 month ). -Mixed.
33 CXR - Normal ( 20% ). - B/l disseminated reticulonodular opacities in MZ / LZ. - Hilar prominence, miliary mottling. CECT - B/l reticulonodular opacities. - Bronchiectasis, air trapping, calcification.
34 B/l diffuse bronchopneumonia B/l diffuse miliary nodules
35 Reticulonodular Pattern
36 Diagnosis 1. H/o residing or visit to an endemic area. 2. Eosinophilia > 3000/mm Elevated IgE. 4. Specific IgE, IgG Ab. 5. Absence of microfilaria in blood and sputum. 6. Response to DEC.
37 Treatment -Diethylcarbazine mg/kg/day for 3 weeks. - Corticosteroids and Ivermectin are tried in chronic variant of disease. - If untreated, disease may resolve spontaneously or may lead to development of interstitial lung disease
38 Loffler s Syndrome - Immune response to Ascaris larva during migration of larva through lungs. - Other parasites and drugs are also responsible. - No cause in 1/3 patients. - All age groups. -M = F.
39 Clinical Features - Cough, mostly non-productive. - Dyspnoea. - Low grade fever. - Anorexia, malaise, weight loss. - Crackles.
40 Laboratory Investigations 1. BLOOD - TLC, ESR, IgE. - AEC > 3000 mm/ SPUTUM - Eosinophils, larva during pneumonic stage, charcot - leyden crystals. 3. STOOL - Ova, parasites ( not seen up to 8 weeks after onset of respiratory symptoms. 4. PFT - Restrictive.
41 CXR - B/L transient migratory peripheral infiltrates. - May coalesce to form areas of consolidation. CECT - B/l transient migratory peripheral infiltrates.
42 Treatment - Search for the etiological cause - parasites / drugs. - Mild cases resolve spontaneously in 1 2 weeks. - Severe cases Corticosteroids 1 mg/kg/day. - To prevent late GIT symptoms : - Albendazole 400 mg single oral dose. - Mebendazole 500 mg single oral dose. - Follow up after 3 months is needed.
43 ABPA - Immune response of the bronchi and lung parenchyma in response to Ag of Aspergillus colonizing the airways. -M = F years ( any age may be affected ). - H/o of asthma / atopy. - Family occurrence of ABPA is a rarity.
44 Clinical Features - Cough with sputum. - Dyspnoea. - Fever, lethargy, malaise. - Expectoration of golden brown plugs. - Wheeze / Crackles. - Signs of clubbing, cyanosis, cor-pulmonale, RF.
45 Major Criteria 1. H/o asthma. 2. Immediate skin reaction to Ag ( type 1). 3. AEC > 2000/mm IgE > 1000 IU/ ml. 5. Serum precipitins against Aspergillus fumigatus. 6. Specific IgE and IgG against Aspergillus fumigatus. 7. Transient pulmonary infiltrates on CXR. 8. Central bronchiectasis with normal tapering of distal bronchi.
46 Minor Criteria 1. Delayed skin reaction to Ag ( type 3 ). 2. Brownish plugs in sputum. 3. Sputum culture positive for Aspergillus fumigatus.
47 Minimum Essential Criteria 1. H/o asthma. 2. Immediate skin reaction to Aspergillus fumigatus. 3. IgE. 4. Central bronchiectasis. 5. Specifis IgE and IgG against Aspergillus fumigatus.
48 STAGING 1. Acute. 2. Remission. 3. Exacerbation. 4. Steroid dependant. 5. Fibrotic lung disease.
49 Laboratory Investigations 1. BLOOD - TLC, ESR, IgE. - AEC > 1000/mm 3. - Serum precipitins against A.F. 2. SPUTUM - Eosinophils. - Positive culture for A.F. 3. SKIN TESTS - Positive immediate test. 4. PFT - Restrictive / obstructive / mixed.
50 CXR -. TRANSIENT CHANGES - Fleeting shadows, Tram-line shadows. - Tooth-paste and Gloved finger shadows. - Lobar/segmental collapse, consolidation. PERMANENT CHANGES - Central bronchiectasis. - Parallel line shadows, Ring shadows. - Fibrosis, honeycombing, cavities. CECT- Central bronchiectasis.
51 Large lobulated perihilar shadows.
52 Lobulated masses contained in the cystic cavities extending to the central hilum.
53 Treatment Corticosteroids Acute / Exacerbation mg/kg/day for 2 weeks, then 0.5 mg/kg alternate day for 2-3 months with gradual tapering. Steroid dependant mg alternate day. Fibrotic - low dose daily or alternate day. Itraconazole Reduces dose of CS, decrease rate of exacerbations but long term effect is not known.
54 Drugs / Radaition - Develop progressively. - Cough, dyspnoea, fever, cutaneous rashes ( drugs ). - B/L pulmonary infiltrates in CXR. - AEC > 1000/mm 3 ; BAL > 40%. - Resolution of infiltrates after stopping of drug, steroid hasten recovery in severely ill. - Corticosteroids are mainstay if treatment in radiation induced disease.
55 All the best..
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