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Discoid meniscus: an ultrastructural study with transmission electron microscopy
Ozgur Ahmet Atay1, Murat Pekmezci, Mahmut Nedim Doral
1Department of Orthopedics & Traumatology, Hacettepe University School of Medicine, 06100 Ankara, Turkey. oaatay@hacettepe.edu.tr
The American Journal of Sports Medicine
|January 25, 2007
Summary
Discoid menisci exhibit altered collagen fiber structure compared to normal menisci, potentially explaining their increased tear susceptibility. This study reveals key ultrastructural differences in discoid menisci.
Area of Science:
- Orthopedics
- Biomaterials Science
- Histology
Background:
- Normal meniscal ultrastructure is well-understood and linked to tear pathology.
- Discoid menisci are presumed to have similar composition to normal menisci, but their ultrastructure remains uninvestigated.
- Previous research has not explored the microscopic differences between discoid and normal menisci.
Purpose of the Study:
- To investigate the ultrastructure of discoid menisci.
- To compare the ultrastructure of discoid menisci with that of normal, nondiscoid menisci.
Main Methods:
- A descriptive laboratory study was conducted.
- Meniscal biopsies were obtained from patients undergoing surgery for meniscus tears.
- Samples included 12 patients with discoid menisci and 6 without, all examined via transmission electron microscopy.
Main Results:
- Discoid menisci showed a reduced number of collagen fibers compared to normal menisci.
- The collagen fibers in discoid menisci displayed a heterogeneous arrangement, unlike the homogeneous pattern in normal menisci.
Conclusions:
- The ultrastructure of discoid menisci differs significantly from that of normal menisci.
- These observed ultrastructural differences may underlie the increased vulnerability of discoid menisci to tears.
