Role of neutering in cancer

Question 1

Which cancers are more likely in neutered dogs?

Answer 1

Cardiac tumors All
Osteosarcoma esp Rottweilers (<1 y of age at castration)
Prostatic tumors (carcinoma, adenocarcinoma, transitional cell carcinoma)
Transitional cell carcinoma of the urinary bladder All
Lymphoma esp Golden retrievers (<1 y of age at castration)
Splenic haemangiosarcoma, MCT (females)

Question 2

When are mammary tumours common?

Answer 2

Significant tumor risk occurs around 7 to 8 years of age, and increases until 11 to 13 years of age, with malignant tumors having a mean age of development around 9 to 11 years

Question 3

What leiomyoma is affected by spaying?

Answer 3

Vaginal leiomyomas occur almost exclusively in intact female dogs, and ovariectomy significantly decreases the incidence of recurrence even with incomplete surgical removal of the tumor.