Dysplastic collagen fibrils in the human vocal fold. An electron microscope study

Area of Science:

• Otorhinolaryngology
• Pathology
• Biomedical Engineering

Background:

• Chronic hoarseness can significantly impact quality of life.
• Understanding the underlying structural changes in the vocal cords is crucial for effective treatment.
• Previous research has explored various causes of vocal fold dysfunction.

Purpose of the Study:

• To investigate the microstructural alterations in human vocal cords associated with chronic hoarseness.
• To examine the condition of collagen fibrils and elastic fibers in affected vocal cord tissues.

Main Methods:

• Biopsy samples from human vocal cords of patients with chronic hoarseness were analyzed.
• Electron microscopy was employed to visualize the ultrastructure of collagen and elastic fibers.

Main Results:

• Pathological changes were observed in both collagen fibrils and elastic fibers.
• Collagen fibrils showed splitting and fracturing.
• Elastic fibers exhibited lacuna or cyst formation, and in some cases, complete degeneration.

Conclusions:

• The observed structural changes in vocal cord connective tissues are linked to chronic hoarseness.
• The primary or secondary nature of these pathological alterations remains to be determined.
• Further research is necessary to elucidate the etiology of these vocal cord changes.