RESUMO
Arachnoid granulations are hypertrophied arachnoid villi, which extend from the subarachnoid space into the venous system and aid in the passive filtration and reabsorption of cerebrospinal fluid. These macroscopic structures have been described in various locations, with the transverse and sigmoid sinuses seen as normal variants on imaging. Here we present the occurrence of an enlarged arachnoid granulation at the foramen rotundum where a variant intracranial venous sinus was identified during routine dissection. Variations, such as the one described herein, should be recognised by those who operate or interpret images of the skull base.
Assuntos
Aracnoide-Máter/anormalidades , Coristoma/patologia , Cavidades Cranianas/anormalidades , Tecido de Granulação/anormalidades , Idoso de 80 Anos ou mais , Aracnoide-Máter/cirurgia , Cadáver , Coristoma/cirurgia , Cavidades Cranianas/cirurgia , Dissecação , Feminino , Tecido de Granulação/cirurgia , HumanosRESUMO
A case of communicating spinal extradural arachnoid cyst arising from the thoracic midline dural defect is reported in a 17-year-old lad. The condition is a rare cause of spinal cord compression, and usually presents with progressive spastic paraparesis in adolescence. Fifty-eight per cent of the cases reported are of the communicating type. Myelography establishes the diagnosis if the cysts can be filled with contrast medium. Surgical removal of the cyst and obliteration of the communication usually lelads to prompt improvement in neurological symptoms
Assuntos
Adolescente , Humanos , Masculino , Aracnoide-Máter/anormalidades , Compressão da Medula Espinal/etiologia , Meningomielocele/complicações , Mielografia , Meningomielocele , Espaço Epidural , JamaicaRESUMO
A case of communicating spinal extradural arachnoid cyst arising from the thoracic midline dural defect is reported in a 17-year-old lad. The condition is a rare cause of spinal cord compression, and usually presents with progressive spastic paraparesis in adolescence. Fifty-eight per cent of the cases reported are of the communicating type. Myelography establishes the diagnosis if the cysts can be filled with contrast medium. Surgical removal of the cyst and obliteration of the communication usually leads to prompt improvement in neurological symptoms (AU)