{Reference Type}: Case Reports
{Title}: Ectopic cerebellar tissue in the occipital bone: a case report.
{Author}: Kawashima M;Kobayashi M;Ishizawa K;Fujimaki T;
{Journal}: J Med Case Rep
{Volume}: 11
{Issue}: 1
{Year}: Aug 2017 21
暂无{DOI}: 10.1186/s13256-017-1394-0
{Abstract}: <B>BACKGROUND: </B>Ectopic cerebellar tissue located distantly from the normal cerebellum is very rare, and its pathophysiology remains to be elucidated.<BR><B>METHODS: </B>We report an extremely rare case of intraosseous ectopic cerebellum detected incidentally at suboccipital craniotomy in a 46-year-old Japanese woman with hemifacial spasm. She had a small bone defect in the occipital bone, which contained a tiny area of soft tissue surrounded by cerebrospinal fluid connecting to the normal subarachnoid space through a dural opening. Histopathology demonstrated cerebellar cortex tissue consisting of molecular and granular cell layers.<BR><B>CONCLUSIONS: </B>This is the first report of glioneuronal ectopia within the skull bone separated from normal brain tissue, and it is important to distinguish this entity from other osteolytic lesions.