41 topics with brief reviews: definitions, key facts, and classroom questions.
This section focuses on morphological changes in respiratory system diseases. It compiles a database ranging from normal lung structure and defense mechanisms to severe pathology. We cover acute processes (lobar and focal pneumonia, ARDS, edema), chronic obstructive pulmonary diseases (COPD, bronchial asthma, emphysema), and vascular disorders.
A separate block is dedicated to interstitial lung diseases (sarcoidosis, fibrosing alveolitis) as well as occupational pathology — pneumoconioses (silicosis, anthracosis, asbestosis). The etiology, pathogenesis, and histological classification of lung cancer are detailed as thoroughly as possible.
During practical classes and exams, the stages of lobar pneumonia, morphological differences of various types of lung cancer, pathogenesis of COPD, and complications of silicosis are tested most rigorously. Understanding these macro- and microscopic processes is your key to successfully passing pathological anatomy.
Type I pneumocytes. They are large, flat, cover about 95% of the alveolar area, and serve as the main site of gas exchange.
Why do pneumonias frequently occur when cilia are damaged?
Mucociliary clearance is impaired. Mucus with trapped bacteria stagnates in the bronchi, creating an ideal environment for pathogen proliferation and inflammation development.
From which structures during embryogenesis do congenital lung cysts develop?
Congenital lung cysts form as a result of the separation of tissue fragments from the primitive gut during embryogenesis. Common bronchogenic cysts are lined on the inside with bronchial epithelium.
Is atelectasis an irreversible change in lung tissue?
No, by definition, this is a strictly reversible pathological process. If the factor causing the collapse is eliminated in a timely manner, the lung tissue is capable of fully expanding again.
Who is in the primary risk group for primary pulmonary hypertension?
The disease predominantly affects children and women of reproductive age (20 to 40 years). This indirectly confirms the role of hormonal background in the pathogenesis.
Why does pulmonary edema produce pink foamy sputum?
The foamy structure is formed during breathing, and the pink color appears at the progression stage when erythrocytes and other blood cells begin to enter the alveolar lumen.
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