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Pneumothorax II: Pathophysiology

Pneumothorax II: Pathophysiology

Pneumothorax means the presence of air in the pleural space — the thin potential gap between the visceral and parietal pleura. This condition disrupts the normal pressure balance that keeps the lungs inflated, leading to partial or complete collapse of the affected lung.Normal physiologyUnder normal conditions, the pleural space maintains a slightly negative intrapleural pressure, which keeps the lungs expanded against the chest wall. This negative pressure creates a delicate balance...

Pleura of the Lungs

Pleura of the Lungs

The lungs are nestled in a cavity, shielded by the pleura. The pleura, a form of serous membrane, wraps around each lung. This membrane arrangement consists of two layers: the visceral and parietal pleurae. The visceral pleura lines the surface of the lungIn contrast, the parietal pleura is the outer layer and contacts to the thoracic wall, the mediastinum, and the diaphragm. The hilum is the point of connection between the visceral and parietal layers. The space between the parietal and...

Pneumothorax-I

Pneumothorax-I

A pneumothorax is a condition where air builds up in the space between the lung and the chest wall, causing the lung to collapse. This condition arises when air enters the space between the parietal and visceral pleura, disrupting the negative pressure essential for lung inflation. This can lead to a partial or complete collapse of the lung.
Pneumothorax can be even further classified as spontaneous, traumatic, and tension pneumothorax.

Atelectasis II: Pathophysiology

Atelectasis II: Pathophysiology

Atelectasis develops when alveoli lose their air and collapse inward. Because lung tissue is naturally elastic, these air sacs shrink rather than remaining open. Collapsed alveoli are no longer ventilated, reducing their role in gas exchange. Blood flow may continue in these regions, creating a ventilation–perfusion mismatch. Clinical findings include decreased breath sounds, dullness to percussion, reduced chest expansion, and decreased tactile fremitus as sound transmission through...

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Related Experiment Video

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Thoracoscopic Extended Right Middle Plus Lower Sleeve Lobectomy for Non-Small-Cell Lung Cancer

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[Intrathoracic hibernoma].

Fraukje J M Pol¹, Uta Flucke, Kourosh Jafari

¹Universitair Medisch Centrum St Radboud, afd. Pathologie, Nijmegen.

Nederlands Tijdschrift Voor Geneeskunde

|January 30, 2014

Summary

A rare intrathoracic hibernoma, a benign tumor resembling brown fat, was diagnosed in a young woman. Surgical removal offers an excellent prognosis for this uncommon tumor.

Area of Science:

Thoracic oncology
Diagnostic pathology
Surgical oncology

Background:

Hibernomas are rare, benign tumors often asymptomatic and resembling fetal brown adipose tissue.
While typically found in the thigh, intrathoracic hibernomas are infrequent and often incidentally discovered.
These tumors possess the potential to infiltrate adjacent thoracic structures.

Observation:

A 29-year-old woman presented with left-sided thoracic pain.
Imaging revealed a large intrathoracic soft tissue mass causing right lung compression.
Open biopsy confirmed the mass as a hibernoma.

Findings:

Histopathological analysis is essential for accurate hibernoma diagnosis.
No instances of malignant transformation or metastasis have been documented in medical literature.

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Complete surgical excision is the recommended treatment for intrathoracic hibernomas.

Implications:

Early and accurate diagnosis of intrathoracic hibernomas is crucial.
Surgical intervention ensures a favorable long-term outcome for patients.
This case highlights the importance of considering rare diagnoses in thoracic pathology.