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- W2065550997 abstract "Abstract OBJECTIVE: The filum terminale (FT) is a fibrovascular band involved in the pathophysiology of tethered cord syndrome (TCS). Its morphological and ultrastructural properties remain largely unknown even though they are thought to play a role in the generation of TCS in adult patients with normal level conus medullaris. MATERIALS AND METHODS: Twenty fresh adult human cadavers had their fila measured and removed. Transversal and longitudinal sections of the proximal, middle, and distal thirds of FT were submitted to light microscopy analysis with four different techniques. Five fila were selected for longitudinal and transversal scanning electron microscopy analysis. RESULTS: The bulk of the FT is composed of 5- to 20-μm thick longitudinal bundles of Type 1 collagen separated by 3- to 10-μm intervals, although capillaries and other elements may be present. A delicate (0.05–1.5 μm) meshwork of predominantly Type 3 collagen transversal fibers connects these bundles. Abundant longitudinally oriented elastic and elaunin fibers are found inside collagen bundles. A complex tridimensional structure is evidenced on electron microscopy. CONCLUSION: The longitudinal arrangement of collagen bundles and the impressive amount of elastic and elaunin fibers should elicit considerable elastic properties to the FT. An altered elasticity mechanism has been proposed for TCS; further studies are needed with TCS patients to define whether the collagen structure, Type 1/Type 3 proportion, or elastic fiber content are altered, which could lead to new histopathological definitions of TCS, helping neurosurgeons in the difficult management of TCS patients with normal level conus medullaris." @default.
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- W2065550997 date "2006-05-01" @default.
- W2065550997 modified "2023-10-18" @default.
- W2065550997 title "Ultrastructural Study of the Filum Terminale and Its Elastic Fibers" @default.
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- W2065550997 doi "https://doi.org/10.1227/01.neu.0000210224.54816.40" @default.
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