A study utilizing the Veterinary Medical Database of over 40,000 dogs found that neutered males and females were more likely to die of
cancer than intact dogs, especially of OSA, LSA and MCT [15].
Both studies found that neutered male dogs have a four times higher risk of prostate
cancer than intact dogs.
Not exact matches
For both male and female Rotties spayed or neutered before one year of age, there was a one in four lifetime risk for bone
cancer, and the sterilized animals were significantly more likely to develop the disease
than intact dogs of the same breed.
A study on Golden Retrievers found that male
dogs who were neutered before 12 months of age had double the risk of hip dysplasia than their intact counterparts (Torres de la Riva G, Hart BL, Farver TB, Oberbauer AM, Messam LLM, et al. (2013) Neutering Dogs: Effects on Joint Disorders and Cancers in Golden Retriev
dogs who were neutered before 12 months of age had double the risk of hip dysplasia
than their
intact counterparts (Torres de la Riva G, Hart BL, Farver TB, Oberbauer AM, Messam LLM, et al. (2013) Neutering
Dogs: Effects on Joint Disorders and Cancers in Golden Retriev
Dogs: Effects on Joint Disorders and
Cancers in Golden Retrievers)
For
cancers other
than those three, the incidence of
cancers included in the study were higher for neutered
than intact dogs.
A retrospective study of cardiac tumors in
dogs showed that there was a 5 times greater risk of hemangiosarcoma, one of the three most common
cancers in
dogs, in spayed bitches
than intact bitches and a 2.4 times greater risk of hemangiosarcoma in neutered
dogs as compared to
intact males.
On average, castrated
dogs are three times more likely
than their
intact counterparts to develop some type of prostate
cancer.
Gonadectomized female and male
dogs lived longer
than sexually
intact dogs in this cohort (Table 1) ⇓ and in a previous study (32), which might be expected to contribute to a higher overall
cancer incidence associated with gonadectomy.