dural-based tumor
A neoplasm that originates from or is attached to the dura mater, the tough outer membrane covering the brain and spinal cord.
Full Definition
A dural-based tumor is a neoplasm that arises from or has its primary attachment to the dura mater, the fibrous membrane that forms the outermost layer of the meninges. These tumors most commonly include meningiomas, but can also encompass other lesions such as hemangiopericytomas, dural metastases, or primary dural lymphomas. The dural attachment often determines surgical approach and resection strategy, as complete removal of the dural attachment site is important for preventing recurrence. Imaging characteristics typically show a broad-based attachment to the dural surface with possible dural tail sign on contrast-enhanced studies.
Usage
Usage note: Specify the exact dural location (falx, tentorium, convexity) when describing these tumors.
In Context
- "The dural-based tumor showed characteristic broad attachment to the falx cerebri." — Imaging report
- "Simpson grade I resection requires removal of the dural-based tumor with its attachment site." — Surgical technique description