A 66-year-old male smoker presents with 2 years of progressive exertional dyspnea and dry cough. Vital signs show BP 138/82, HR 92, RR 18, SpO2 88% on room air. Examination reveals bibasilar crackles and digital clubbing. High-resolution CT demonstrates subpleural reticular opacities and honeycombing at lung bases. PFTs show reduced DLCO. Chest X-ray shows no acute infiltrates. He denies orthopnea. Which histopathologic feature is most characteristic of this disease?
- A)Caseating granulomas centered on hilar nodes
- B)Diffuse hyaline membranes lining alveoli
- C)Numerous hemosiderin laden macrophages after pulmonary infarction
- D)Massive eosinophilic mucus plugging in bronchi
- E)Fibroblast foci with temporal heterogeneityGABARITO
Explicação
Fibroblast foci with temporal heterogeneity is correct. Idiopathic pulmonary fibrosis shows a usual interstitial pneumonia pattern with patchy interstitial fibrosis, fibroblast foci, and alternating areas of normal and scarred lung. The disease causes bibasila... Ver explicação completa e trilha adaptativa →