STUDY DESIGN: A case report. OBJECTIVES: To report and discuss a rare case of @entity4282 that was considered to be formed as a result of idiopathic @entity548 occurring at the facet joint (joint apoplexy). SUMMARY OF THE BACKGROUND DATA: Spontaneous @entity4282 is a relatively rare condition. According to a review article of 199 spontaneous @entity4282 in the last 2 decades, the majority of these conditions are thought to result from a rupture of the epidural vascular network. Recently, a @entity548 and a @entity1410 occurring from the ligamentum flavum were reported as rare types of @entity4282 . METHODS: The authors describe the treatment and the clinical, radiologic, surgical, and pathologic findings in one @entity1 with a rare @entity4282 . RESULTS: Magnetic resonance imaging revealed that the extradural @entity66 was continuous with the right L4-5 facet joint; this was confirmed by surgery when the extradural @entity1410 was directly visualized. The joint cavity was also filled with the @entity1410 . There was no evidence of preceding cyst formation macroscopically or microscopically. The excised capsule of the left L4-5 facet joint revealed moderate @entity1373 of the synovium with an increased number of capillary vessels. CONCLUSIONS: This is the first reported case of @entity614 considered to be a result of facet joint apoplexy in the absence of any preceding @entity12897 formation. The pathomechanism of the @entity548 at the lumbar facet joint is unclear, but it is speculated that there could be an association with @entity179 . Surgical excision of this mass was considered to be the definitive treatment.

Symptomatic XXXX of lumbar facet joint: joint apoplexy of the spine?

@entity1 :: ('9606', 'Species') :: ['patient'] @entity4282 :: ('MESH:D046748', 'Disease') :: ['spinal epidural hematomas', 'epidural hematoma', 'spinal epidural hematoma'] @entity66 :: ('MESH:D004194', 'Disease') :: ['mass lesion'] @entity548 :: ('MESH:D006470', 'Disease') :: ['hemorrhagic lumbar synovial cyst', 'hemorrhage', 'bleeding'] @entity1373 :: ('MESH:D006965', 'Disease') :: ['hyperplasia'] @entity12897 :: ('MESH:D013581', 'Disease') :: ['synovial cyst'] @entity1410 :: ('MESH:D006406', 'Disease') :: ['hematoma'] @entity179 :: ('MESH:D019636', 'Disease') :: ['degenerative change of the facet joint'] @entity614 :: ('MESH:D011843', 'Disease') :: ['radiculopathy']
@entity1410 :: (MESH:D006406,Disease) :: ['hematoma']
