Nodular Dermatofibrosis

Nodular Dermatofibrosis is a skin disorder when nodules (firm lumps) form in and under the skin.

Breeds at Risk

In this condition, the nodules are often considered resulting from tumors in kidneys. The condition affects most often the German Shepherd dog breed, but has been also reported in other dog breeds, including mixed-breed dogs.

The lumps can grow and, in severe cases, they can measure from 0.1 to 2 inches. Those on the feet often ulcerate or cause foot deformities and lameness. This skin disorder is usually associated with underlying canine kidney or uterus cancer (in unspayed female dogs). The mean age at the first detection of nodular dermatofibrosis in dogs is 3-5 years, therefore it is very important for the young dogs to be tested for microscopic kidney lesions as early as 1 year of age before the dogs are used for breeding to detect possible disease carriers.

Signs of Nodular Dermatofibrosis

If you noticed lameness and any unusual growths on the dog's legs, and that your dog drinks and urinates more than usual, has blood in the urine, lost his appetite, vomits and loses weight, then kidney, uterus cancer or intestinal polyps should be considered as a possible cause of these symptoms.

Although the diagnosis is fairly simple, there is no treatment for this condition. It is thought to be hereditary.