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بسم الله الرحمن الرحيم. ” بلي إن تصبروا و تتقوا ويأتوكم من فورهم هذا يمددكم ربكم بخمسة الآف من الملآكة مسومين * وما جعله الله إلا بشري لكم و لتطمئن قلوبكم به وما النصر إلا من عند الله العزيز الحكيم “. صدق الله العظيم آل عمران الأيه 125& 126. Childhood Interstitial lung Disease (chILD).
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بسم الله الرحمن الرحيم ” بلي إن تصبروا و تتقوا ويأتوكم من فورهم هذا يمددكم ربكم بخمسة الآف من الملآكة مسومين * وما جعله الله إلا بشري لكم و لتطمئن قلوبكم به وما النصر إلا من عند الله العزيز الحكيم“ صدق الله العظيم آل عمران الأيه 125& 126
Childhood Interstitial lung Disease (chILD) Journey to solve the Mystery Dr. Malak Shaheen (PhD Pediatrics, MSc Critical Medicine)
What is chILD Syndrom? “Pneumonitis”
Persistent 3 of the following 4 ≥1 month: 1- Respiratory symptoms (cough, distress, exercise intolerence) 2- Evidence of impaired gas exchange (hypoxia &/or hypercapnia) 3- Diffuse/Patchy radiological chest abnormality (CXR or CTscan) 4- Adventitious sounds on auscultation (crepitation/wheeze) What are common features of chILD?
Fan Staging of chILD • Asymptomatic • Symptomatic with normal oxyhemoglobin saturation • Symptomatic with nocturnal or exercise-induced desaturation • Desaturation at rest • Pulmonary hypertension
Infectious Aspiration (GORD) Environmental (hypersensitivity pneumonitis) Drug-induced Neoplastic diseases (&LCH) Lymphoproliferative disorders (including HIV) Metabolic disorders Surfactant disorders Neurocutaneous syndromes Idiopathic pulmhemosidrosis Causes of chILD
Collagen vascular disease Pulmonary vasculitis syndromes Radiation-induced Amyloidosis Graft-versus-host disease ARDS (recovering phase) Hypereosinophilic syndromes Pulmonary veno-occlusive disease Sarcoidosis With chronic liver, kidney, bowel diseases Causes of chILD cont….
DD to rule out include: • Cystic fibrosis • Asthma • Cardiac (heart) disease • Primary ciliary dyskinesia • Scoliosis and chest wall abnormalities • Neuro-muscular disease/Neurocut dis • Immune deficiency • TB • Developmental abnormalities (BPD - Alveolar capillary dysplasia- Pulm hypoplasia)
Does chILD differ from adILD? • Differences in the immune system responces, cytokine and growth factors • Histologic classification differs significantly • Specific types presented at children not adults • Rarer and less stereotyped than adult ILD • More difficult to treat than adults.
Is there one test to diagnose chILD? • First round investigations: • Imaging (HRCT + ventilation control) • Lung functions (DLCO) • Oxygen saturation (rest /exercise) • Blood tests (CBC, ESR, Immune, Serology and PCR, RAST, ACE, HIV) • Resp secretions cultures/PCR • Sweat chloride test. • pH study/Contrast swallow • ECG and ECHO • Ciliary Brush Biopsy • Urine for CMV PCR
Is there one test to diagnose chILD? • Second round investigations: • Bronchoscopy and BAL for cytology (LCH, iron laden macrophages, PAP) and cultures • Prone Oesophagram for H type fistula • Videofluroscopy for aspiration evidence • Cardiac Cath • Detailed lymphocyte function tests • TB –Elispot test
Is there one test to diagnose chILD? • Third round investigations: • Lung biopsy (Transbronchial, percutaneous, thoracoscopic, open lung) CT guided from affected patch and unaffected patch. • Special stains (eg. Bompesin or PAS) • Immunoblotting for sufactant proteins at lung biopsy • Electron microscopy study of biopsy • DNA for mutations in SPB, SPC and ABCA3
Histologic Classification of chILD * UIP: Usual interstitial pneuminitis (rare for children)
CIP DIP Nonspecific interstitial pneumonitis
Surfactant Metabolism Dysfunction • Surfactant is a complex mixture of phospholipids and proteins (SP-A, -B, -C and -D)& ABCA3. • ABCA3 an ATP-binding transporter Of lipids. (chILD) due to ABCA3 gene mutations
Further Readings …. First edition - 2008
Further Readings …. www.childfoundation.info/chILD
Keep the hat on! Thank You