Lumps and bumps are not all the same. One such lump, known as a cutaneous histiocytoma, is a skin mass that often appears seemingly all of a sudden in younger dogs, especially under 2 years of age. The cause of the mass is unknown, and although it looks very much like a tumor, it may just be proliferative or reactive tissue, because most often they will regress on their own within a few months. Sometimes it takes 2-3 weeks and sometimes up to 5-6 months to regress. That can be worrisome because waiting that long on a true tumor that may not be benign is risky. An aspirate and cytology or biopsy is recommended to confirm the diagnosis. If you are lucky like Quincy, the happy 11-month-old Boxer in our picture, a cutaneous histiocytoma will regress on its own. In Quincy’s case it took 2-1/2 months, but as you can see, the “lump” fully resolved on its own.
Thanks, Quincy, for letting us share your story!