Histology Course S I 24 Department of Pathology, University of Zurich histologycourse

S I 24 pleomorphic adenoma  HE further information (German) on HiPaKu
  ICD-10: C08.9; ICD-O: 8940/0

34-year-old female, slowly growing (over years), painless swelling in the area of the right parotid. Facial nerve function intact. Previous fine-needle-aspiration cytology was suspicious of pleomorphic adenoma

- Tumour with slim connective tissue capsule
- Areas rich and poor in cells consisting of narrow strands of cells and tubular formations
  (=epithelial part of tumour)
- Plenty of tumour stroma, partially homogenously loosened (=myxoid) and poor in cells,
  partially cartilage-like (mesenchymal-like)
- Outside the tumour there are a remnants of the mostly serous parotid gland.