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Rare Dog Cancer Spreads in UK: Experts Urge Vigilance
6 Nov
Summary
- A rare, contagious dog cancer is circulating in the UK.
- CTVT, absent for over 50 years, is linked to imported dogs.
- The cancer is treatable with chemotherapy, especially if caught early.

Veterinary experts are raising alarms as a rare, contagious form of dog cancer, canine transmissible venereal tumour (CTVT), has been confirmed to be actively spreading within the UK. This marks the first instance of dog-to-dog transmission in the country in over half a century. The reappearance is strongly linked to the increasing number of rescue dogs imported from regions where CTVT remains prevalent.
CTVT is one of the world's few contagious cancers, typically spreading through mating or close physical contact. Its absence from Britain for over 50 years is attributed to past strict dog control measures. However, current import checks do not screen for this specific cancer, allowing infected dogs to enter unnoticed.
Symptoms to watch for include red, fleshy, or cauliflower-like lumps around the genital area that may bleed, as well as unusual growths on the face or nose. Bloody discharge, difficulty urinating, and excessive licking of the genital area are also indicators. Researchers at the University of Cambridge are offering free testing to vets to aid in diagnosis.
Fortunately, CTVT is highly treatable. It responds well to chemotherapy, particularly vincristine, and most dogs make a full recovery with prompt veterinary attention. Owners are advised to monitor their pets for any unusual signs and to inform their vet about any foreign travel or rescue adoption history for their dog.