Histology Course S VII 22 Department of Pathology, University of Zurich histologycourse

S VII 22 Neurinom HE further information (German) on HiPaKu
  neurilemoma ICD-10: C71.9; ICD-O: 9560/0

60-year-old female. 2-year history of increasing hearing difficulty in one ear, clinically misdiagnosed as middle ear apoplexy. 3 months’ history of ataxia. The CT scan shows a walnut-sized tumour in the right cerebellum.

- The tumour is poor in cells but rich in fibrous tissue.
- The tumour cells appear thin, with bean- to cigar-shaped thin nuclei in a wave-like structure.
- Parts of the tumour consist of degenerative, loose myxoid tissue.
- Some cells have atypic nuclei. No necrosis. Low-grade vessel proliferation.
WHO grade I