STUDY DESIGN: Report of two cases of @entity614 caused by @entity528 of the ligamentum flavum. OBJECTIVE: To report a rare cause of @entity614 . SETTING: Orthopaedic department, Osaka, Japan. SUMMARY OF BACKGROUND DATA: Two @entity1 , both 50-year-old @entity1 presenting with signs and symptoms suggestive of @entity614 were found to have a ligamentum flavum mass. The masses were removed and the @entity1 regained normal function postoperatively. METHODS: To reveal the nature of the mass, histopathological studies were made. Continuous sections were prepared from the removed mass lesions. The sections were stained with @entity1710 and @entity1711 , van Gieson's stain, azan stain, @entity5644 Schiff reaction, Alcian blue stain and von Kossa's stain. RESULTS: Histological examination revealed @entity528 of the ligamentum flavum. No elastic fibers were found at the degeneration site. Diffuse mucopolysaccharide deposition was found at the degeneration site, however, no cyst was found. Collagen fibers were not increased. @entity1184 or ossification of the ligamentum flavum was not recognized in the sections. At a follow-up examination over 2 years later, the @entity1 were free of symptoms and the findings of a neurological examination were normal. CONCLUSION: Two cases of @entity528 of the ligamentum flavum of the lumbar spine were reported, which have seldom been described as the cause of @entity614 .

XXXX of the ligamentum flavum of the lumbar spine.

@entity1 :: ('9606', 'Species') :: ['patients', 'men'] @entity5644 :: ('MESH:D010504', 'Chemical') :: ['periodic acid'] @entity1184 :: ('MESH:D006984', 'Disease') :: ['Hypertrophy'] @entity1711 :: ('MESH:D004801', 'Chemical') :: ['eosin'] @entity1710 :: ('MESH:D006416', 'Chemical') :: ['hematoxylin'] @entity614 :: ('MESH:D011843', 'Disease') :: ['acute lumbar nerve root compression'] @entity528 :: ('MESH:D009410', 'Disease') :: ['myxomatous degeneration']
@entity528 :: (MESH:D009410,Disease) :: ['Myxomatous degeneration']
