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Posterior fossa microcystic meningioma mimicking an arachnoid cyst
James Bridges1, Jared Brougham2, Danielle Terrell2
1School of Medicine, LSU Health Shreveport , Shreveport, LA, USA.
Abstract:
Microcystic meningioma is an uncommon subtype of World Health Organization grade 1 meningiomas often associated with a shorter progression-free survival. Diagnosis through imaging alone can often be challenging due to atypical characteristics, especially when found in unexpected locations. Here, we present a 55-year-old woman who was diagnosed, based on imaging, with a posterior fossa arachnoid cyst 5 years prior after complaints of headaches and gait imbalance. After surgical resection of the "arachnoid cyst," the diagnosis of microcystic meningioma was made. This case report emphasizes the clinical importance and challenges associated with diagnosing microcystic meningiomas.
Insights
Microcystic meningiomas are rare brain tumors that can be misdiagnosed. This case highlights the diagnostic challenges and clinical importance of identifying these tumors, even in unusual locations.
Area of Science:
- Neuro-oncology
- Neurosurgery
- Pathology
Background:
- Microcystic meningioma, a World Health Organization grade 1 tumor, is an uncommon subtype.
- These tumors are often linked to reduced progression-free survival.
- Imaging diagnosis can be difficult due to atypical features and unusual locations.
Observation:
- A 55-year-old woman presented with headaches and gait imbalance.
- Initial imaging suggested a posterior fossa arachnoid cyst, diagnosed 5 years prior.
- Surgical resection was performed, and the "arachnoid cyst" was diagnosed as a microcystic meningioma.
Findings:
- The case underscores the diagnostic challenges in identifying microcystic meningiomas.
- Atypical presentations can lead to misdiagnosis, as seen with the arachnoid cyst misidentification.
- The location in the posterior fossa presented diagnostic difficulties.
Implications:
- Accurate and timely diagnosis of microcystic meningioma is crucial for patient outcomes.
- Increased awareness of atypical presentations is needed for neurosurgeons and radiologists.
- Further research into improved diagnostic methods for microcystic meningiomas is warranted.
