End Stages of Breast Cancer in Dogs

Dogs of any breed can develop breast cancer.

There are five mammary glands in a female dog. Most cases of mammary, or breast, cancer occur in the fourth or fifth glands, but it can potentially affect any of the five glands. Stages of breast cancer are determined by the location of the tumor and how far it has spread through the rest of the body (metastasis).

Identification

The end stages of mammary cancer include dogs who are suffering from large tumors or extremely invasive tumors, involvement of the lymph nodes, additional sarcomas and spreading to far portions of the body.

Symptoms

Swelling or abnormal growths that are irregular in shape or size are common symptoms. These growths may bleed or ulcerate and be accompanied by additional symptoms such as coughing, loss of appetite and difficulty breathing.

Diagnosis

Several tests are required to determine if breast cancer is present and whether spreading has occurred. These tests can include a biopsy of the abnormal growth, a physical exam, X-rays, a urinalysis, various blood work and ultrasounds.

Treatment

Treatment options for canine mammary cancer include surgical removal of the growths, chemotherapy, radiation therapy, anti-estrogen therapy and ovariohysterectomy, which is spay surgery (if the dog has not previously been spayed).

Prevention

While there is no way to fully prevent canine mammary cancer, spaying prior to two years of age can greatly reduce their risk.

References

• Canine Cancer Awareness: Mammary Cancer
• Pet Education: Mammary Tumors (Cancer)
• Pet Place: Mammary Gland Tumors in Dogs