Meniscoids are folds of synovial membrane that project into the articular cavities of zygapophyseal joints throughout the cervical spine.

Meniscoids were identified in 86% of the zygapophyseal joints; 50% contained both ventral and dorsal meniscoids, 7% contained a ventral meniscoid only and 29% contained a dorsal meniscoid only.

Meniscoids were classified as adipose (4%), fibrous (74%), or fibroadipose (22%) based upon histological composition.

It is suggested that meniscoids are responsible for spinal blockades and eventually for other vertebrogenous complaints coming from local inflammation of facet joints.

Farrell S.F., Osmotherly P.G., Cornwall J. & Rivett D.A. (2015) The anatomy and morphometry of cervical zygapophyseal joint meniscoids. Surg. Radiol. Anat. Sep;37(7):799-807. doi: 10.1007/s00276-014-1406-3. Epub 2014 Dec 20.

Kos J., Hert J. & Sevcík P. (2002) Meniscoids of the intervertebral joints. Acta Chir Orthop. Traumatol. Cech.: 69(3):149-57.