Harrison's 287- Interstitial Lung Diseases Flashcards
What Interstitial Lung Diseases cause Alveolar Inflammation & Fibrosis due to Unknown Cause?
IPF
AIP
COP
SLE/RA and other CTD
What Interstitial Lung Diseases cause Alveolar Inflammation & Fibrosis due to Known own Cause?
Asbestosis
Noxious Gases
Radiation Pneumonitis
Aspirations
What Interstitial Lung Diseases cause Granulomas in the Interstitium & Vessels due to Known Cause?
Hypersensitivity Pneumonitis - Organic Dust, Silicosis, Berylliosis
What Interstitial Lung Diseases cause Granulomas in the Interstitium & Vessels due to Unknown Cause?
Sarcoidosis
Granulomatosis with Polyangiitis (Wegner’s)
Eosinophilic Granulomatosis with Polyangiitis (Churg Strauss)
What are the non specific symptoms of ILDs?
Tachycardia
Basilar Crackles Bilaterally
Cyanosis
Clubbing
What are the laboratory Findings of ILDs?
ANA/RF (even in non-CTDs)
LDH↑
ACE ↑
If Vasculitis - ANCA / Anti-GBM
What are the Blood Gases changes of ILDs?
While In Rest = Normal
Hypoxia (V/Q Mismatch↑) or Respiratory Alkalosis are possible
What Imaging Method is the most adequate to diagnose ILDs?
CT
Reticular Patterns Identified better than X-ray
(Biopsy is a Must for Diagnosis)
Changes in some PFT in ILDs :
TLC
FRC
RV
Changes in some PFT in ILDs :
TLC↓
FRC↓
RV↓
Changes in some PFT in ILDs :
FEV1
FVC
FEV1/FVC ratio (Tiffeneau-Pinelli index)
Changes in some PFT in ILDs :
FEV1↓
FVC↓
FEV1/FVC ratio ↑ or Normal
Changes in some PFT in ILDs :
DLCO
A-a Gradient
Changes in some PFT in ILDs :
DLCO↓
A-a Gradient↑
64 year old man, Dyspnea, Unproductive Cough, Reticular Opacities with Honeycombing. Arterial Hypoxia that worsens with Exertion. Peripheral Subpleural Fibrosis on Biopsy.
What is the most likely diagnosis? what is the treatment? What is the Prognosis?
Idiopathic Pulmonary Fibrosis
No effective treatment - Thalidomide for Symptomatic cough relief
Poor Prognosis
28 year old women, Non Smoker, with Dyspnea, Unproductive Cough, Sand-Glass Patten Opacities on subpleural lower lobes in Imaging. ANA Positive. On Biopsy - Uniform Fibrosis Patterns.
What is the most likely diagnosis? what is the treatment? What is the Prognosis?
Nonspecific Interstitial Pneumonia
Steroids with Azathioprine or Mycophenolate Mofetil
Good Prognosis
45 year old women, with ARDS like patterns on Labs with Consolidations bilaterally. Prodrome of 7 days with fever, cough, dyspnea and malsie.
What is the most likely diagnosis? what is the treatment? What is the Prognosis?
Acute Interstitial Pneumonia
in Many cases - Mechanical Ventilation & Supportive
60% Mortality
56 year old women, subacute pneumonia symptoms.Opacities on periphery & subpleural lower lobes. Granulation tissue on small airways with Inflammatory Alveoli.
What is the most likely diagnosis? what is the treatment? What is the Prognosis?
Cryptogenic Organizing Pneumonia
Steroid allow recovery in 2/3 of patients
What possible drugs cause ILDs with Fibrosis?
Bleomycin Busulfan Amiodarone Methotrexate Nitrofurantoin
ILD - CTD Etiologies?
RA SLE Progressive Systemic Sclerosis Polymyositis & Dermatomyositis Sjogren's Syndrome
ILD - secondary to Smoking ?
Desquamative Interstitial Pneumonia
Respiratory Bronchitis-Associated ILD
Pulmonary Langerhans cell Histiocytosis
What type of HSN is present in Hypersensitivity Pneumonitis?
Mixed Type III/IV Hypersensitivity
Who is common to have Hypersensitivity Pneumonitis?
Farmers or Birds Fanciers
Caplan Syndrome
Rheumatoid Arthritis + Pneumoconiosis with Intrapulmonary Nodules