A 75-year-old woman presented with transient left upper extremity tingling and slurred speech for 20–30 min and right headache before episode. MRI at the same day shows hyperintensity suggesting cSAH within right central sulcus on FLAIR (A1, arrows), single line hypointensity on GRE (A2, arrow) and no positive lesion on DWI (A3). CT shows subtle hyperintensity at same area (A4, arrow). Three weeks later, the patient has a recurrent episode with transient right 4th and fifth finger tingling and slurred speech lasting for 2–3 minutes. MRI within 24 hours shows hyperintensity in left central sulcus on FLAIR (B1, arrows), subtle hypointensity on GRE (B2, arrow) and no DWI positive lesion at the same time (B3). MRV demonstrates no venous sinus thrombosis (B4).