Table 1:

Clinical and MR features of the 6 patients with vestibular schwannoma showing a focal hyperintensity in the dorsal brain stem

Patient No./Age (y)/SexSideTumor Size (mm)Internal ArchitectureDistance from Median Sulcus (mm)Depth from Floor of 4th Ventricle (mm)Section No. Showing Hyperintensity on CISSInitial SymptomPeriod of Postoperative MR Imaging after Surgery
1/24/FLeft25 × 30 × 14Solid with a central small cyst7–82–35Tinnitus, ear fullness2 y 11 mo
2/30/FRight17 × 20 × 16Solid with several small cysts7–82–45(Head trauma)5 y 4 mo
3/47/MLeft20 × 30 × 18Cystic > solid7–93–65Tinnitus5 mo
4/52/MRight39 × 50 × 36Mainly cystic5–72–45Facial dysesthesia1 y 3 mo
5/53/MLeft32 × 35 × 32Mainly cystic8–91–26Hearing loss3 y 1 mo
6/54/FRight21 × 21 × 15Solid7–112–46Dizziness2 y 1 mo
  • Note:—CISS indicates constructive interference in steady state axial imaging.