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Modeling Brain Metastases Through Intracranial Injection and Magnetic Resonance Imaging
Published on: June 7, 2020
Intracranial metastasis or meningioma? An uncommon clinical diagnostic dilemma
Patricio Tagle1, Pablo Villanueva, Gonzalo Torrealba
1Department of Neurosurgery, Faculty of Medicine, Pontificia Universidad Católica de Chile, Santiago.
Background:
Cerebral metastases are the most frequent brain tumors in adults and they may occasionally present as an isolated meningeal mass, suggesting a meningioma. Because of the prognostic relevance in discriminating both tumors, we review the literature and analyze four patients in whom the diagnosis of meningioma was initially made.
Case Description:
Four cases of isolated meningeal metastases are presented and in all of them a meningioma was considered as the main preoperative diagnosis. Only one patient had a history of previous cancer. The primary tumors found after pathological testing of the lesions were thyroid carcinoma, prostate adenocarcinoma, breast adenocarcinoma, and hypernephroma. The clinical and neuroimaging features as well as the differential diagnoses are discussed. The literature regarding these forms of meningeal metastases was reviewed.
Conclusions:
Although they are uncommon, dural metastases can be mistaken for meningiomas. Our experience in these cases has led us to consider ordinary metastases as a differential diagnosis even when a meningioma is suspected. The definitive diagnosis of a meningioma should be established only after the histopathological report has been analyzed.
Insights
Meningeal metastases can mimic meningiomas, leading to misdiagnosis. Accurate pathological analysis is crucial for distinguishing these brain tumors and ensuring appropriate patient care.
Area of Science:
- Neurology
- Oncology
- Pathology
Background:
- Cerebral metastases are the most common brain tumors in adults.
- They can present as isolated meningeal masses, mimicking meningiomas.
- Distinguishing between these tumors is critical for prognosis.
Observation:
- Four cases of isolated meningeal metastases initially diagnosed as meningiomas are presented.
- Primary tumors included thyroid carcinoma, prostate adenocarcinoma, breast adenocarcinoma, and hypernephroma.
- Only one patient had a prior cancer history.
Findings:
- Dural metastases can be mistaken for meningiomas.
- Neuroimaging and clinical features may suggest meningioma.
- Pathological examination is essential for definitive diagnosis.
Implications:
- Consider metastases in the differential diagnosis of suspected meningiomas.
- Histopathological analysis is the gold standard for differentiating meningiomas from metastases.
- Accurate diagnosis impacts treatment and patient outcomes.
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