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Pathology – Pneumothorax
Definition • The accumulation of air in the pleural cavity.
Epidemiology: Prevalent. • Males are impacted more significantly than females.
Aetiology
Spontaneous pneumothorax generally manifests in slender, tall young males. The phenomenon is believed to originate from the rupture of small, fragile apical blebs in lung tissue caused by lung expansion. • Preexisting pulmonary conditions, such as COPD, asthma, pneumonia, tuberculosis, cystic fibrosis, sarcoidosis, lung cancer, and idiopathic pulmonary fibrosis (IPF). Uncommon disorders frequently linked to pneumothorax encompass pulmonary Langerhans cell histiocytosis, pulmonary lymphangioleiomyomatosis, and thoracic endometriosis. • Trauma, such as penetrating thoracic injury and rib fractures. • Iatrogenic, for instance, subclavian vein cannulation and lung biopsy.
Pathogenesis
Air escapes from the compromised lung into the pleural cavity until the pressures equilibrate. The lung collapses to a varying extent, contingent upon the magnitude of the pneumothorax. • Infrequently, the tissues next to the pulmonary lesion function as a unidirectional valve, obstructing pressure equalization. The persistent accumulation of pressure and volume in the pleural cavity displaces mediastinal structures, resulting in cardiorespiratory arrest (tension pneumothorax).
Presentation:
• Abrupt onset of unilateral pleuritic thoracic discomfort. • Breathlessness may occur, contingent upon the magnitude of the pneumothorax. Individuals with preexisting pulmonary conditions typically observe an exacerbation of their symptoms.
Radiology
• Air is present in the pleural space alongside various degrees of lung collapse. Histopathology: Apical lung tissue removed from patients with spontaneous pneumothoraces has one or more bullae linked to subpleural alveolar collapse and fibrosis. The superficial visceral pleura exhibits reactive mesothelial hyperplasia and inflammation, frequently characterized by an abundance of eosinophils.
Prognosis: Approximately one-third of patients with spontaneous pneumothorax experience recurring episodes, typically on the same side.
Definition • The accumulation of air in the pleural cavity.
Epidemiology: Prevalent. • Males are impacted more significantly than females.
Aetiology
Spontaneous pneumothorax generally manifests in slender, tall young males. The phenomenon is believed to originate from the rupture of small, fragile apical blebs in lung tissue caused by lung expansion. • Preexisting pulmonary conditions, such as COPD, asthma, pneumonia, tuberculosis, cystic fibrosis, sarcoidosis, lung cancer, and idiopathic pulmonary fibrosis (IPF). Uncommon disorders frequently linked to pneumothorax encompass pulmonary Langerhans cell histiocytosis, pulmonary lymphangioleiomyomatosis, and thoracic endometriosis. • Trauma, such as penetrating thoracic injury and rib fractures. • Iatrogenic, for instance, subclavian vein cannulation and lung biopsy.
Pathogenesis
Air escapes from the compromised lung into the pleural cavity until the pressures equilibrate. The lung collapses to a varying extent, contingent upon the magnitude of the pneumothorax. • Infrequently, the tissues next to the pulmonary lesion function as a unidirectional valve, obstructing pressure equalization. The persistent accumulation of pressure and volume in the pleural cavity displaces mediastinal structures, resulting in cardiorespiratory arrest (tension pneumothorax).
Presentation:
• Abrupt onset of unilateral pleuritic thoracic discomfort. • Breathlessness may occur, contingent upon the magnitude of the pneumothorax. Individuals with preexisting pulmonary conditions typically observe an exacerbation of their symptoms.
Radiology
• Air is present in the pleural space alongside various degrees of lung collapse. Histopathology: Apical lung tissue removed from patients with spontaneous pneumothoraces has one or more bullae linked to subpleural alveolar collapse and fibrosis. The superficial visceral pleura exhibits reactive mesothelial hyperplasia and inflammation, frequently characterized by an abundance of eosinophils.
Prognosis: Approximately one-third of patients with spontaneous pneumothorax experience recurring episodes, typically on the same side.
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