Canine Histiocytoma

Canine histiocytoma is a non cancerous skin growth that commonly occurs in young adult dogs. This tumor is a rounded eroded growth, but is not a skin cancer. Although canine histiocytoma can affect in dogs of all ages, the incidence of this skin tumor is more frequent in canines less than 4 years old. Histiocytoma is common in certain breeds that include Boxers, Dachshunds and Labradors.

As the skin tumor is non-malignant, it does not cause any harm and there is no need to worry about it. This raised, hairless lump often appears suddenly, without prior warning. The good news is that the skin growth goes away on its own, without causing any problem. In other words, the tumor is not a serious condition. At the most the skin growth may cause a minor skin infection, that can be easily treated at home. In most cases, a visit to a veterinarian is not essential to treat this condition as it subsides by itself within 3 months.

Diagnosis

To make sure that the tumor developed is non cancerous (benign), a biopsy is done. Looking at the biopsy report the veterinarians will be able to determine whether the skin growth is malignant or not. Biopsy is the best way to confirm a cancerous growth. In this procedure, a small piece of the round eroded growth is snipped off and sent to the laboratory for further analysis. In the laboratory, the small piece of tissue is examined under a microscope. A microscopic examination of the tissue will help to know what exactly is the growth. A local anesthesia is given to the affected dog, before performing the biopsy. This is done so that the dog does not feel the pain, while removing the tissue.

Another option to take out the cells from the tumor is by using a needle or one can simply collect the cells from the tumor surface and observe them under the microscope. This method, however does not allow to view the architecture of the tissue in question. But, with the cells available for examination, one can confirm the identity of the tumor.

Treatment for Canine Histiocytoma

Histiocytoma can be surgically removed, and is the fastest routine to get rid of this non cancerous tumor. In most cases, the skin growth is small and will not require much efforts to remove the tumor. The procedure is simple and easy to perform. Sometimes easy removal of the tumor is not possible, in case it is developed in a locations very close to the eye or ear flaps. In such circumstances, surgery is not performed and the abnormal growth is allowed to subside on its own. However, veterinarians do not recommend this mode of treatment, as the tumor undergoes regression on its own. In case the tumor causes secondary bacterial infection, surgical intervention is required. Skin irritation is a common problem in this condition, but topical treatment that contain DMSO and a cortisone derivative, is useful to control the symptoms of irritation. Regression (retardation of growth) of canine histiocytoma, is spontaneous in majority of the dogs affected.

Most dog owners are alarmed after seeing the skin lump as it appears red. However, canine histiocytoma is not painful and does not affect the mobility of the dog.