Dural metastasis from prostate carcinoma mimicking tuberculum sellae meningioma: A case report

BACKGROUND: Prostate carcinoma rarely metastasizes to the central nervous system. However, when it does, a dural lesion is a common and possible misdiagnosis of meningioma. Here, we describe a case of a 77-year-old man with dural metastasis from prostate carcinoma of the tuberculum sellae. CASE DESCRIPTION: The patient was diagnosed with prostate carcinoma 7 years previously and was well-controlled by hormone therapy. He was incidentally found to have a suprasellar tumor and underwent endoscopic endonasal transsphenoidal surgery because of rapid tumor growth and worsening visual impairment. Since his serum prostate-specific antigen (PSA) level was within the normal range, malignant meningioma was suspected based on the magnetic resonance imaging (MRI) and the course. However, the pathological findings revealed dural metastasis from prostate carcinoma. He received radiation therapy, and the tumor disappeared on MRI. His visual impairment improved without recurrence. This case report highlights that dural metastasis of the tuberculum sellae arose despite the patient’s PSA level being within the normal range, and a single metastasis to the dura was found. CONCLUSION: In patients with a history of prostate carcinoma or older men, careful follow-up considering the possibility of metastasis is required when a dural lesion is found.