title: Ring-enhanced malignant meningioma mimicking a brain metastasis from a renal cell carcinoma.
abstract: We report a case of ring-enhanced malignant meningioma mimicking a solitary brain metastasis in a patient with renal cell carcinoma. This misleading situation is rarely encountered and has not been documented previously. Considering the low incidence of brain metastases from a renal cell carcinoma staged T1-2 without systemic metastases, a clinical diagnosis requires circumspection, and both primary and metastatic tumors should be considered when a solitary brain lesion is encountered.
authors.affiliation: Department of Urology, Ohmori Hospital, Akita, Japan. yashi@jichi.ac.jp
authors.forename: Masahiro
authors.initials: M
authors.lastname: Yashi
authors.forename: Masahiro
authors.initials: M
authors.lastname: Sasaki
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Ono
mesh_terms: D000368:Aged; D001707:Biopsy, Needle; D001932:Brain Neoplasms / Q000473:pathology* / Q000556:secondary; D002292:Carcinoma, Renal Cell / Q000473:pathology* / Q000601:surgery; D003937:Diagnosis, Differential; D006801:Humans; D007680:Kidney Neoplasms / Q000473:pathology* / Q000601:surgery; D008297:Male; D008579:Meningioma / Q000473:pathology* / Q000556:secondary; D009367:Neoplasm Staging; D016609:Neoplasms, Second Primary / Q000473:pathology* / Q000601:surgery; D009392:Nephrectomy / Q000379:methods; D010296:Parietal Lobe / Q000473:pathology; D011379:Prognosis; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome