Thoracolumbar Intradural Intramedullary Bronchogenic Cyst: A Very Rare Abnormality

An intradural spinal cyst with both intramedullary and extramedullary components at the level of Th12 is described in a 33-year-old man who presented with a history of pain of the legs and back for 1 month. After surgery, histopathologic examination revealed the diagnosis of bronchogenic cyst. These intradural and extramedullary, poorly defined cystic lesions in the spinal canal are extremely rare. It was not possible to find any other case with both intramedullary and extramedullary component in the literature. In this case, the cyst was a bronchogenic cyst; this is an extremely rare form of such cysts. They are thought to be a malformation resulting from a split notochordal syndrome. Thus, the first thoracolumbar intraspinal bronchogenic cyst with intramedullary and extramedullary component is reported in this study.