Mast cell tumour
Location: Flanks (50%), paws (40%), head and neck (10%)
Behaviour: Depends on the stage, metastases possible
Diagnostics: Cytology, histology, ultrasound
Treatment: Surgery, chemotherapy, tyrosine kinase inhibitors
Prognosis: Depends on tumor grade, location, presence of metastases, treatment
Here you can find pictures of dogs with this tumour type. These images may be unsuited for sensitive viewers.
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On the nose-skin transition, you see a mast cell tumor on the right of the screen.
The 3 mast cell tumors are surrounded by the small circle, the large circle indicates the margin needed to completely remove the tumor.
This mast cell tumor started between the eyes. The disrupted mast cells in the tumor released substances that partially blotted this tumor and cleared the way for a second neighboring lump in the white hair.
This discrete tissue mass is a mast cell tumor.
The dog is shaved and disinfected in preparation for the removal of the mast cell tumor.
Mast cell tumor on the ball sac.
The tissue mass above the nails and below the joint is a mast cell tumor.
  1. Miller et al., A retrospective review of treatment and response of high-risk mast cell tumours in dogs. Veterinary and Comparative Oncology, 14: 4, 361–370.
  2. Smrkovski et al. Masitinib mesylate for metastatic and non-resectable canine cutaneous mast cell tumours. Veterinary and Comparative Oncology, 13: 3, 314-321.
  3. VSSO
  4. London CA, Thamm DH. Mast Cell Tumors. Withrow and MacEwen's Small Animal Clinical Oncology, 5th edition, Chapter 20 (p 335 - 349).
  5. De Ridder et al., Randomized controlled clinical study evaluating the efficacyand safety of intratumoral treatment of canine mastcell tumors with tigilanol tiglate (EBC-46). J Vet Intern Med. 2020;1–15.
Clinical trials

Centre Hospitalier Vétérinaire Frégis
Arcueil, France
+33 1 49 85 83 00

Comparison of Near- Infrared Lymphography and Lymphoscinthigraphy for sentinel node mapping and resection

Division of Radiation Oncology, Vetsuisse Faculty, University of Zurich
Zurich, Switzerland
+41 44 6358444