Canine Cancer Library

A calm, structured reference to canine cancers organised two ways: by body location and by tumour type. Each page groups related histologic subtypes so you can find what you need without jumping between many small pages.

Browse

All conditions

  • Skin Cancer in Dogs — Overview of skin cancers including mast cell tumours, melanoma, squamous cell carcinoma, and cutaneous hemangiosarcoma.
  • Bone Cancer (Osteosarcoma) — The most common primary bone tumour in dogs, typically affecting large and giant breeds.
  • Mammary Gland Tumours — Common in intact and late-spayed females; roughly half are malignant.
  • Oral & Mouth Cancers — Includes melanoma, squamous cell carcinoma, and fibrosarcoma of the mouth.
  • Liver & Biliary Tumours — Primary and metastatic tumours of the liver and bile duct system.
  • Kidney & Urinary Tract Cancer — Transitional cell carcinoma of the bladder/urethra and primary renal tumours.
  • Lung Cancer — Primary pulmonary tumours are uncommon; metastatic spread to the lungs is more frequent.
  • Spleen Cancer (Hemangiosarcoma) — Splenic hemangiosarcoma is aggressive and can present as sudden collapse from internal bleeding.
  • Gastrointestinal Tumours — Tumours of the stomach, small intestine, colon, and rectum.
  • Brain & Spinal Cord Tumours — Primary CNS tumours (meningioma, glioma) and metastatic disease affecting the brain and spine.
  • Endocrine Tumours — Tumours of hormone-producing glands including thyroid, adrenal, and pituitary.
  • Reproductive System Tumours — Testicular, ovarian, uterine, and transmissible venereal tumours.
  • Mast Cell Tumours — The most common skin tumour in dogs — behaviour ranges from benign to highly aggressive depending on grade.
  • Lymphoma — A cancer of lymphocytes; multiple anatomic forms (multicentric, alimentary, mediastinal, cutaneous).
  • Hemangiosarcoma — An aggressive cancer of blood vessel lining cells, most often affecting the spleen, heart, or skin.
  • Melanoma — Pigment-cell tumours; oral and nail-bed forms are usually malignant, cutaneous forms often benign.
  • Sarcomas (Soft Tissue & Bone) — A family of connective-tissue cancers including soft tissue sarcomas, osteosarcoma, and hemangiosarcoma.
  • Carcinomas — Cancers of epithelial (lining) tissue — includes squamous cell, transitional cell, and adenocarcinoma.
  • Benign Tumours & Growths — Lipomas, sebaceous adenomas, histiocytomas, and other benign lumps commonly found in older dogs.