Simpson grade
Dr Francis Deng and Dr Khalid Alorabi et al.
The Simpson grade of meningioma resection was described in 1957 and correlated the degree of surgical resection completeness with symptomatic recurrence 1.
Although the type of resection still plays a part in the likelihood of symptomatic recurrence, other factors (such as the MIB-1 index) are also important, particularly in grades I - III 2.
-
grade I
- complete removal including resection of underlying bone and associated dura
- 9% symptomatic recurrence at 10 years
-
grade II
- complete removal and coagulation of dural attachment
- 19% symptomatic recurrence at 10 years
-
grade III
- complete removal w/o resection of dura or coagulation
- 29% symptomatic recurrence at 10 years
-
grade IV
- subtotal resection
- 44% symptomatic recurrence at 10 years
-
grade V
- simple decompression with or without biopsy
- 100% symptomatic recurrence at 10 years (small sample in original paper)
Related Radiopaedia articles
Dural masses
-
dural masses
-
meningioma
- grading and histological variants
- imaging signs
- variants
- by location
- primary intradural meningioma
- primary extradural meningiomas
- Simpson grade (of resection)
- hemangiopericytoma
- solitary fibrous tumor of the dura
- primary dural lymphoma
- Rosai-Dorfman disease
- EBV-associated smooth muscle tumor
- meningeal melanocytoma
- primary meningeal malignant melanoma
- Erdheim-Chester disease
- sarcoidosis
- dural metastases
- hypertrophic pachymeningitis
-
meningioma
Unable to process the form. Check for errors and try again.