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Intradiploic meningioma mimicking calvarial metastasis: case report
Ulaş Yener1, Fatih Bayrakli, Erkan Vardereli
1Marmara University, Faculty of Medicine, Neurosurgery Department, Istanbul, Turkey. ulasyener@yahoo.com
Abstract:
Meningiomas are the most common benign intracranial neoplasms. Nearly 20% of all primary intracranial tumors are meningiomas. Primary intraosseous meningiomas are a subtype of the meningiomas that represents the most uncommon manifestation of meningiomas. Although rare, these tumors can be found to occur in unexpected areas of the head and neck. The patient was a 78- year-old male who was operated two times for urinary bladder cancer. During his routine oncology follow-ups, the PET scan demonstrated a hyperactive area in the right parietal bone. Preoperative diagnosis was a metastasis, but histological examination revealed an osteolytic interosseous meningioma. The possibility of an intraosseous meningioma mimicking a metastatic tumor should be kept in mind.
Insights
Intraosseous meningiomas are rare bone tumors that can mimic metastatic cancer. This case highlights the importance of considering these unusual tumors in differential diagnoses, especially in patients with a history of cancer.
Area of Science:
- Neurosurgery
- Oncology
- Pathology
Background:
- Meningiomas are common benign brain tumors, but primary intraosseous meningiomas are exceptionally rare.
- These tumors can occur in unusual head and neck locations, posing diagnostic challenges.
Observation:
- A 78-year-old male with a history of bladder cancer presented with a hyperactive area on PET scan in the right parietal bone.
- Initial suspicion was metastasis due to the patient's cancer history.
Findings:
- Histological examination revealed an osteolytic intraosseous meningioma, not a metastasis.
- This rare subtype of meningioma mimicked a metastatic lesion on imaging.
Implications:
- The findings underscore the necessity of considering intraosseous meningiomas in the differential diagnosis of bone lesions, particularly in cancer patients.
- Accurate diagnosis is crucial for appropriate management and to avoid unnecessary treatments for misdiagnosed conditions.
