Mast cell tumour
Location: Flanks (50%), paws (40%), head and neck (10%)
Behaviour: Depends on the tumour stage, metastases possible
Diagnostics: Cytology, histology, ultrasound
Treatment: Surgery, chemotherapy, tyrosine kinase inhibitors
Prognosis: Depends on tumour 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.
Show pictures
Please note the pink mass (a mast cell tumour) on the nose-skin transition on the right side of the screen.
The 3 mast cell tumours are surrounded by small circles, the large circles indicate the margin needed to completely remove the tumour.
This mast cell tumour originated between the eyes. The disrupted mast cells in the tumour released substances that partially liquified this tumour and cleared the way for a second neighbouring lump in the white hair.
This discrete tissue mass is a mast cell tumour.
The dog is clipped and disinfected in preparation for the removal of the mast cell tumour.
Mast cell tumour on the scrotum.
The tissue mass above the nails and below the joint is a mast cell tumour.
  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. London CA, Thamm DH. Mast Cell Tumors. Withrow and MacEwen's Small Animal Clinical Oncology, 6th edition, Chapter 21 (p 382 - 393).
  6. 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