Examkin

Soru

Zorluk: OrtaInterpreting Imaging Results

A 66-year-old man comes to the pulmonary clinic complaining of a gradual onset of shortness of breath and a persistent, dry cough over the past seven months. He has no history of fever, chest pain, hemoptysis, or significant weight loss. He is a retired accountant, has no known occupational exposures, and has never smoked. His vital signs are within normal limits. On physical examination, there are bilateral fine end-inspiratory crackles auscultated at the lung bases, and digital clubbing is present. A high-resolution computed tomography (HRCT) scan of the chest is performed, revealing peripheral, subpleural, and bibasilar predominant reticular opacities. Additionally, there are multiple clustered cystic airspaces measuring 3 to 10 mm in diameter with thick walls, arranged in multiple layers at the lung bases. There is no significant ground-glass opacification, micronodules, or hilar lymphadenopathy. Based on these imaging findings, which of the following is the most likely diagnosis?

  1. Idiopathic pulmonary fibrosisCevap
  2. B
    Chronic hypersensitivity pneumonitis
  3. C
    Sarcoidosis
  4. D
    Cryptogenic organizing pneumonia
  5. E
    Nonspecific interstitial pneumonia

Cevap

Idiopathic pulmonary fibrosis
The correct answer is idiopathic pulmonary fibrosis because the high-resolution computed tomography (HRCT) description perfectly matches the usual interstitial pneumonia (UIP) pattern. The UIP pattern is defined by a subpleural and basal predominance, reticular abnormalities, and most importantly, honeycombing (clustered cystic airspaces in multiple layers). The absence of findings such as predominant ground-glass opacities, micronodules, or air trapping further confirms this diagnosis.

Adım Adım Çözüm

1
Analyze the patient's demographic and clinical presentation.
A 66-year-old man with a 7-month history of progressive dyspnea, dry cough, basilar crackles, and digital clubbing.
Establishing the clinical syndrome points toward a chronic interstitial lung disease.
2
Interpret the specific HRCT imaging features.
The scan shows a peripheral, subpleural, and bibasilar predominant distribution of reticular opacities and thick-walled cystic airspaces (honeycombing), without significant ground-glass opacities.
Identifying the radiologic pattern is required to differentiate the various types of interstitial lung diseases.
3
Correlate the imaging pattern with the diagnostic criteria.
The presence of subpleural, basal predominant reticulation with honeycombing strongly defines the Usual Interstitial Pneumonia (UIP) pattern. In the absence of an identifiable cause (e.g., connective tissue disease, exposures), this pattern is diagnostic of Idiopathic Pulmonary Fibrosis (IPF).
Determining the exact interstitial pneumonia pattern confirms the diagnosis and guides further management.

Anahtar Kavram

The diagnosis of idiopathic pulmonary fibrosis requires identifying a usual interstitial pneumonia (UIP) pattern on high-resolution computed tomography, characterized by subpleural, basal predominant reticular opacities and honeycombing.
Tahmini Süre:1m 30s
Bu soruyu puanla

Konular

Interpreting Imaging Results

Bu konudan daha fazla soru