Related Experiment Videos
The fine structure of so-called minute pulmonary chemodectomas
Human Pathology
|November 1, 1975
Summary
Electron microscopy of lung chemodectomas revealed cells resembling meningiomas, not paragangliomas. These findings question the existence of specialized chemoreceptive paraganglia in the lung.
Area of Science:
- Pathology
- Oncology
- Cell Biology
Background:
- Chemodectomas are rare tumors, and their cellular origin in the lung remains unclear.
- Previous classifications suggested a link to paragangliomas, neuroendocrine tumors.
- This study investigates the ultrastructure of lung chemodectomas using electron microscopy.
Observation:
- Minute lung tumors, identified as chemodectomas, were examined.
- Cells exhibited a whorling pattern with interdigitating cytoplasmic processes connected by desmosomes.
- Tumor cells lacked endocrine-like granules and were not associated with nerves or basement membranes.
Findings:
- The ultrastructure of these lung chemodectomas showed minimal distinctive organelles, apart from cytoplasmic fibrils.
- The tumors bore little resemblance to paragangliomas.
- A striking similarity was observed between these lung tumors and meningiomas.
Implications:
- The histogenesis of these lung chemodectomas could not be definitively determined.
- The observed cellular morphology challenges the traditional classification and understanding of these tumors.
- Findings cast doubt on the presence of specialized chemoreceptive paraganglia within the lung, prompting re-evaluation of lung neuroendocrine physiology.