Falcine Meningioma Management

Diagnostic Evaluation

• MRI with contrast is the gold standard for evaluating falcine meningiomas, revealing homogeneous dural-based enhancement with characteristic dural tail sign, according to Praxis Medical Insights 1, 2
• Typical MRI findings include isointense or hypointense masses on T1-weighted images, hyperintense on T2-weighted images, with strong uniform contrast enhancement 2
• Somatostatin receptor (SSTR) PET imaging should be considered when tumor extension is unclear or for differentiation between recurrence and post-treatment changes 1, 2

Surgical Management

• Complete surgical resection including removal of the dural attachment is the optimal treatment when feasible, with Simpson grade I resection achievable in 83-100% of cases in experienced centers, as reported by the British journal of neurosurgery 3 and Praxis Medical Insights 1

Radiation Therapy

• External beam radiation therapy is indicated for WHO grade 3 (malignant) meningiomas after surgery and for subtotally resected WHO grade 2 (atypical) meningiomas 1
• Adjuvant radiotherapy for incompletely resected benign meningiomas improves progression-free survival from approximately 50% to over 80% in adult series 3
• Stereotactic radiosurgery is effective for residual or recurrent meningiomas, particularly those <3 cm in diameter 4

Observation Strategy

• Asymptomatic, incidentally discovered small falcine meningiomas (<30 mm) can be managed with observation and serial MRI surveillance 1
• Up to 20% of completely resected benign meningiomas recur within 25 years, indicating the need for lifelong follow-up 3, 5

Post-Treatment Surveillance

• MRI without and with contrast every 6-12 months is recommended for follow-up of falcine meningiomas 1, 4
• SSTR PET imaging may be useful in distinguishing tumor recurrence from post-treatment changes 1

Critical Surgical Considerations

• Modern surgical techniques including image-guided surgery (frameless stereotaxy) improve precision and may reduce surgical side effects 1

Common Pitfalls to Avoid

• Failing to recognize that not all enhancing dural-based lesions are meningiomas; brain metastases, gliomas, and primary CNS lymphoma can mimic meningiomas 2
• Incomplete dural resection increases recurrence risk; the dural attachment must be completely excised when feasible 1