Sexually Transmitted Tumors in Dogs

Transmissible venereal tumor (TVT) is a sexually transmitted, naturally occurring tumor in dogs. It appears as a red, lumpy (lobulated) mass located on the moist tissues (mucosa) of the vagina or penis. The lining of the mouth or the nose may be affected.

Most obvious sign of TVT is a red, tumurous mass bulging out of surface membrane of vagina or on penis. Other symptoms include

Blood dripping from the vagina or penis 

Excessive licking of the genital area 

Protrusion of the tumor from the vagina or penis 

Tumor in the mouth or nose

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