İntersitisyel Pnömoniler
Özet
İntersitisyel pnömoniler (İP), akciğerin periasiner, alveoler ve interlobuler alanlarını etkileyen, diffüz hücresel infiltrasyon ve değişken derecelerde irreversibl fibrozisle karakterize geniş bir hastalık grubudur. Klinik olarak öksürük, çomak parmak ve kaba raller triadı ile restriktif solunum paterni gösteren bu hastalıklar; genetik, otoimmünite, ilaçlar, radyasyon ve özellikle sigara kullanımı gibi çeşitli predispozan faktörlerle tetiklenebilir. Etyolojik bir neden saptanamadığında idiyopatik olarak sınıflandırılan İP'lerin kesin tanısı, klinik veriler ile bilgisayarlı tomografi (BT) paternlerinin entegrasyonunu gerektiren multidisipliner bir yaklaşım ve konsey kararı ile konur. En sık görülen paternlerden Olağan İntersitisyel Pnömoni (OİP), bal peteği görünümü ve traksiyon bronşektazileri ile karakterize olup İdiopatik Pulmoner Fibrozis’in (İPF) temel yansımasıdır. Nonspesifik İntersitisyel Pnömoni (NSİP) ise buzlu cam alanlarının belirginliği ve periferik bölgenin korunması ile ayrışır ve romatolojik hastalıklarla sıkça birliktelik gösterir. Sigara ilişkili RB-İAH ve DİP, migratuar konsolidasyonlar ve ters halo işareti sunan Organize Pnömoni (OP), kistik değişikliklerle izlenen Lenfositik İntersitisyel Pnömoni (LİP), ARDS benzeri ağır tablo oluşturan Akut İntersitisyel Pnömoni (AİP) ve amfizemle fibrozisin birlikte görüldüğü KPFA gibi farklı alt tipler, kendilerine özgü radyolojik bulgularla spektrumu tamamlar.
Interstitial pneumonias (IP) comprise a broad group of diseases characterized by diffuse cellular infiltration in the periacinar, alveolar, and interlobular areas, resulting in variable degrees of irreversible fibrosis. Clinically presenting with a triad of cough, clubbing, and coarse crackles alongside a restrictive respiratory pattern, these disorders can be triggered by genetic factors, autoimmunity, drugs, radiation, and notably smoking. Diagnosed through exclusion as idiopathic when no specific etiology is found, the definitive diagnosis of IPs requires a multidisciplinary approach combining clinical findings with computed tomography (CT) patterns. Among the primary patterns, Usual Interstitial Pneumonia (UIP) features honeycombing and traction bronchiectasis, representing the hallmark of Idiopathic Pulmonary Fibrosis (IPF). Nonspecific Interstitial Pneumonia (NSIP) differentiates itself with prominent ground-glass opacities and subpleural sparing, frequently associated with rheumatologic connective tissue diseases. The spectrum is further expanded by smoking-related RB-ILD and DIP; Organizing Pneumonia (OP) showing migratory consolidations and the reverse halo sign; Lymphocytic Interstitial Pneumonia (LIP) characterized by thin-walled cysts; Acute Interstitial Pneumonia (AIP) presenting with an ARDS-like pattern; and CPFE, which combines upper-lobe emphysema with basal fibrosis.
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