Sticker's sarcoma – tumor or infection?

Sticker's sarcoma is an infectious tumor of the external genital organs of male and female dogs. It is also known as transmissible venereal tumor or venereal sarcomatosis. The disease occurs worldwide, but is primarily found in tropical and subtropical countries (Mediterranean region, Africa, Eastern Europe, South America) where there is a large population of stray dogs.

INHALT
Cause and origin Symptoms Diagnosis Treatment Forecast
Cause and origin

The exact cause of its development remains unknown. However, it does not involve degenerated cells from the body itself, but rather cells that originate from a common source. Scientists have discovered that the original tumor developed approximately 200 to 11,000 years ago.

The tumor is mainly transmitted to the genital mucous membranes through mating. However, close physical contact (licking, biting, sniffing) can also cause transmission to other parts of the body. It is now believed that transmission occurs through tumor cells that have shed and become lodged in tiny mucosal lesions, where they multiply.

Symptoms

In male dogs, reddish, lumpy growths appear on the penis and prepuce, and in female dogs on the vagina and labia. These growths later become fissured and cauliflower-like, bleed easily, and can grow up to 15 cm in size. The surface of the tumors develops weeping, ulcerated inflammations that can lead to bloody or purulent genital discharge. For owners, this discharge is usually the first noticeable sign of the disease and therefore the reason for visiting the veterinarian.

The tumor rarely metastasizes (spreads). In about 5% of cases, secondary tumors can occur in nearby lymph nodes or in the scrotum; distant organs such as the lungs, eyes, or uterus are affected much less frequently.

Sticker Sarcoma Dog
The ulcers grow like cauliflower
Diagnosis

In many cases, the veterinarian can make an initial diagnosis after a clinical examination, localization of the tumor, and a detailed preliminary report. To confirm the diagnosis, a biopsy (tissue sample) must be taken and examined pathologically.

Treatment

Occasionally, the tumors heal on their own, which is referred to as spontaneous remission (= regression). However, sticker sarcomas also respond very well to chemotherapy and radiation. Surgical removal is not recommended, as the reimplantation of tumor cells often leads to recurrence.

Forecast

The prognosis is generally favorable to good, although relapses are not uncommon.