Related Experiment Videos
Surfactant production by neoplastic type II pneumocytes
1Department of Pathology, New York University School of Medicine, New York 10016.
Ultrastructural Pathology
|November 1, 1988
Summary
This study describes a rare lung cancer, bronchioloalveolar carcinoma, that mimics alveolar proteinosis by secreting surfactant. It
Area of Science:
- Pulmonary Pathology
- Oncology
- Cell Biology
Background:
- Bronchioloalveolar carcinoma (BAC) is a subtype of lung cancer.
- Alveolar proteinosis is a rare lung disease characterized by surfactant accumulation.
Observation:
- A diffuse bronchioloalveolar carcinoma with type II pneumocyte differentiation was identified.
- The tumor exhibited abundant intraluminal secretion, mimicking alveolar proteinosis.
- Ultrastructural analysis revealed cytoplasmic lamellar bodies and evidence of apocrine secretion.
Findings:
- The intraalveolar secretion contained surfactant components, including lamellar bodies and tubular myelin-like networks.
- This represents the first morphologic demonstration of surfactant secretion by bronchioloalveolar carcinoma.
- Apocrine secretion and intranuclear tubules were also observed in tumor cells.
Implications:
- This finding expands the understanding of bronchioloalveolar carcinoma's secretory capacity.
- It highlights the importance of ultrastructural examination in diagnosing lung tumors.
- Further research may explore the mechanisms of surfactant secretion in lung cancer.