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Tumor-to-meningioma metastasis (TMM) is a fairly uncommon phenomenon. Only 7 cases of prostate cancer with TMM have previously been described in the literature. The present study aimed to report a case of prostate cancer TMM, and to discuss the relevant clinical and neuroimaging aspects of this condition. A 68-year-old patient presented with headaches, poor visual acuity in the left eye and ipsilateral eyelid droop 3 years after a Simpson II resection of a left sphenoid wing meningioma. Computed tomography revealed a hyperdense area suggestive of a recurrent left sphenoid wing meningioma. During microsurgical resection of tumor, the tumor presented a fibrous aspect and bled profusely. In the histological examination, a metastatic adenocarcinoma was identified inside the transitional meningioma. The immunohistochemical exam favored a prostatic primary site. The patient died two months later of septic shock from pneumonia. This is a rare metastatic presentation. The pre-operative diagnosis of TMM remains challenging in the majority of cases.

Suspected tumor-to-meningioma metastasis: A case report