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www.reference.com/article/treatments-mast-cell-tumors-dogs-d8590ccfddda47f7

Mast cell tumors in dogs are treated with surgery, radiation, chemotherapy or a combination of the three, depending on the severity of the tumors. The most common treatment plan is surgically removing the tumor, reports PetEducation.com.

www.reference.com/article/causes-tumors-dog-15c8fc0c6efb59b3

Some of the causes of tumors in a dog include old age, poor oral care and breed of the dog, explains WebMD. Dogs that have not been spayed also have a higher instance of mammary gland tumors.

www.reference.com/article/mast-cell-activation-disorder-1b700b206eb91bea

Mast cell activation disorders involve an unusual accumulation of mast cells that release histamine and other mediators for inappropriate or unknown reasons and cause inflammation, reports the Journal of Hematology & Oncology. Mast cell activation disorders play a part in such medical conditions as

www.reference.com/article/life-expectancy-brain-tumor-d23a428aa947bd29

Life expectancy varies considerably based on the type of brain tumor and the patient's age, according to American Cancer Society. Sixty-five percent of people ages 20 to 44 with low-grade astrocytomas live five or more years, while five-year survival drops to 43 percent for 45- to 54-year-olds.

www.reference.com/article/life-expectancy-someone-brain-tumor-31c719ed37eae4a8

Life expectancy for brain tumor patients varies widely with the type of tumor and the age of the patient, notes the American Cancer Society. For example, the five-year survival rate for people with meningioma is 92 percent for ages 20 to 44 but 67 percent for ages 55 to 64.

www.reference.com/article/tumor-cells-different-normal-cells-b9d0ae89a2fbcdb7

Tumor cells differ from regular healthy cells in their growth patterns, life cycles and methods of intercellular communication. They vary in size and shape and often exhibit irregular nuclei, which contain disorganized chromosomes. Tumor cells are able to grow undetected by the body's immune system

www.reference.com/article/can-tumors-dog-treated-d7b3d6f4e4124ae3

Dog tumors can be treated, and the type of treatment largely depends on the type of tumor. There are three common types of tumors that affect dogs: fatty skin tumors also known as lipomas, benign (noncancerous) tumors and malignant tumors.

www.reference.com/article/publishes-dog-tumor-images-3cad47e80d0fe65c

As of 2015, images of various types of tumors in dogs are available on the veterinary medicine section of About.com. The Long Beach Animal Hospital website devotes a page to images and information on mast cell tumors in dogs.

www.reference.com/article/germ-cell-tumor-7317ca534a34053a

A germ cell tumor is an abnormal growth that occurs as a result of abnormal reproductive cells, according to Mayo Clinic. The tumor can either be benign or malignant.

www.reference.com/article/determine-life-expectancy-dogs-7752f155b15c3779

Determining the expected lifespan of a dog requires finding the average lifespan of that dog's breed, then adjusting for factors such as the animal's health, weight and environment. For mixed breed dogs, use the dog's weight to get an idea of its average lifespan, then adjust accordingly.