A mammary tumor is a tumor originating in the mammary gland. It is a common finding in older female dogs that are not spayed (the incidence rate is one in 4 in unspayed female dogs over the age of 4), but they are found in other animals as well. The mammary glands in dogs are associated with their nipples and extend from the underside of the chest to the groin on both sides of the midline. There are many differences between mammary tumors in animals and breast cancer in humans, including tumor type, malignancy, and treatment options.
Mammary tumors can be small, simple nodules or large, aggressive, metastatic growths. With early detection and prompt treatment, even some of the more serious tumors can be successfully treated.
There are multiple types of mammary tumors in dogs. Approximately 50% of all mammary tumors in dogs are benign, and the other 50% are … Read the rest
Liver tumors dog are an important part of the body as the liver affects many bodily functions such as blood clotting, breaking down toxic substances, waste products and stores energy for the body.
Two types of liver cancer in dogs can arise – Primary liver cancer and metastatic liver cancer.
Primary liver cancer is the result of a primary liver tumor (one that originates in the liver). The most common primary liver tumor is the hepatocellular carcinoma which usually does not spread to other parts of the body. Instead, the tumor invades into the liver tissue. Primary liver cancer is less common than metastatic liver cancer in dogs. Primary liver cancer occurs more frequently in older dogs (10 years of age or older). There is a slightly increased risk of primary liver tumors in male dogs. Although rather rare, primary liver cancer in dogs can also metastasize to other parts … Read the rest
Chondrosarcoma is a malignant neoplasm accounting for 5%-10% of all primary bone tumors reported in dogs. When a primary chondrosarcoma originates within a bone organ (organs of the skeletal system) it is called central or medullary chondrosarcoma but when it develops in the periosteum (membrane lining the outer surface of all bones) it is known as peripheral chondrosarcoma.
The tumor can develop in the nasal cavity, ribs, pelvis, extraskeletal sites like mammary gland, heart, valves, aorta, larynx, trachea, vertebrae, facial bones, digits, and penis. Central chondrosarcoma of long bones may infiltrate the cortex and supporting layers of the reactive bone. It may also occur in the appendicular skeleton of dogs including sites prone to developing osteosarcoma.
The nasal cavity on the other hand is also highly susceptible to developing chondrosarcoma. The tumor fills the nasal cavity by destroying turbinates (long narrow, curled bone shelf which protrudes into the breathing … Read the rest