Presentation
Sustained a fall. Incidental finding.
Patient Data
Age: 50 years
Gender: Female
From the case:
Intradiploic nontraumatic sphenoid arachnoid pit
{"current_user":null,"step_through_annotations":true,"access":{"can_edit":false,"can_download":true,"can_toggle_annotations":true,"can_feature":false,"can_pin":false},"extraPropsURL":"/studies/95435/annotated_viewer_json?lang=us"}
- right fronto-parieto-temporal soft tissue hematoma but no IC bleeding or fracture.
- circumscribed, irregular, lytic lesion (18 x 10 x 7 mm) in the the left sphenoid bone with thin sclerotic margin and no sign of aggressive growth. The lesion was found to be unchanged when compared to prior study several years earlier.
From the case:
Intradiploic nontraumatic sphenoid arachnoid pit
{"current_user":null,"step_through_annotations":true,"access":{"can_edit":false,"can_download":true,"can_toggle_annotations":true,"can_feature":false,"can_pin":false},"extraPropsURL":"/studies/95437/annotated_viewer_json?lang=us"}
Key image highlighting the lesion.
Case Discussion
Spontaneous lateral sphenoid arachnoid pits are not uncommon and can be found under a plethora of different names in the literature, such as aberrant arachnoid granulations, nontraumatic intradiploic arachnoid cysts, or lateral sphenoid cephaloceles or meningoceles 1,2.