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Meningeal inflammatory pseudotumour: a case report
L Gollogly1, B Sadzot, J P Lejeune
1Laboratory of Neuropathology, University Hospital of Liège, Belgium.
Abstract:
We report the case of a meningeal inflammatory pseudotumour occurring in a 23-year-old male presenting with focal seizures and headaches. Brain imaging techniques showed a 3.5 cm left parietal meningeal tumour. Histology of the surgical specimen showed a dense lymphoid infiltrate permeating the dura mater and leptomeninges, consisting of a predominant polyclonal B cell population as confirmed by immunophenotyping and genotyping. Cultures of serum, CSF, and surgical specimen were negative and there was no serological evidence of a systemic dysimmune disease. The postoperative course was complicated by an episode of brain oedema resolving under steroid therapy. The patient, free from all medication, is asymptomatic at 3 years of follow-up. We discuss previously published cases and the nosology of intracranial inflammatory pseudotumours.
Insights
A rare meningeal inflammatory pseudotumor in a young male caused focal seizures and headaches. Successful surgical removal and steroid treatment led to a full recovery with no recurrence at 3 years.
Area of Science:
- Neurology
- Pathology
- Immunology
Background:
- Meningeal inflammatory pseudotumors are rare intracranial lesions.
- Differentiating these from malignant tumors is crucial for appropriate management.
Observation:
- A 23-year-old male presented with focal seizures and headaches.
- Brain imaging revealed a 3.5 cm left parietal meningeal mass.
Findings:
- Histopathology confirmed a dense lymphoid infiltrate, predominantly polyclonal B cells.
- Cultures and serological tests were negative for infection or systemic autoimmune disease.
- Postoperative brain edema resolved with steroid therapy.
Implications:
- This case highlights the importance of considering inflammatory pseudotumors in the differential diagnosis of meningeal masses.
- Complete resection and appropriate medical management can lead to favorable long-term outcomes.
- Further research into the pathogenesis and classification of intracranial inflammatory pseudotumors is warranted.
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