Hemangioblastoma arising from duramater: Case report.

RATIONALE: Hemangioblastoma (HB) is a benign tumor that is typically located in the subtentorial region of the brain. HB that originates from dura mater is extremely rare.

PATIENT CONCERNS: Herein, we reported a single case of a patient who presented with dizziness and headache lasting for 1 year that progressively aggravated within 1 month.

DIAGNOSIS: After admission, the patient underwent head magnetic resonance (MR); a nodular long T1-T2 signal was found on the right side of parietal falx cerebri; the lesion appeared with high intensity on FLAIR and DWI, and with isointensity on ADC map. In addition, significant homogeneous enhancements were observed on the enhanced scan. According to clinical and imaging features, the lesion was diagnosed as meningioma. However, after performing tumor resection by craniotomy, the diagnosis of HB is clear. Additional pathological examination data were found: Ki-67(+1%), NSE(-), CD31(+), CD34(+), CD56(+), S-100(-), α-inhibin(+), Vimentin(-), EGFR-), GFAP(-), CK-pan(-), EMA(-), PR(-).

INTERVENTIONS: The mass with abundant blood supply was removed.

OUTCOMES: Ten days after operation, the patient was discharged from hospital and no signs of recurrence were observed three months later.

LESSONS: To sum up, obvious high signal intensity in T2WI sequence and homogeneous enhancement are main characteristics that differentiate dural hemangioblastoma from meningioma lesion.