Synovial Chondromatosis of Dorsal Spine: Case Report of Rare Pathological Entity and Review.

Synovial chondromatosis is an uncommon benign condition of metaplastic and focal formation of cartilage in the intimal layer of synovial membrane of joints with extremely low risk of malignant potential. Disease process is typically monoarticular predominantly involving large joints and spinal involvement being a very rare event. We report 31-year-old male patient who presented with history of low backache, left lower limb pain, difficulty in micturition since 8 months and difficulty in walking since 2 months .Magnetic resonance imaging of spine revealed D10-11 extradural lesion arising from left facet joint. Lesion was excised completely by posterior approach with resolution of symptoms. Literature reveals fourteen cases of spinal variant of synovial chondromatosis which has been published and this report represents the fifteenth case.