Common Skin Lumps And Bumps In The Dog, What Should We Do?
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214 – April, 2025
By William F. Craft
In this article, I will talk about a few of the most basic, and common skin tumors that can occur in dogs. The skin is the largest organ in the body and this article is not meant to be a comprehensive review of all possible tumors that can occur in the skin of the dog, instead it is meant be a general overview of what to do if your dog has skin lumps or bumps. Many of the skin tumor types in dogs can look similar but have different behaviors. Your veterinarian should be consulted for any new lump or bump that appears on your dog or if there have been any changes to previously evaluated lumps.
Lumps or bumps in the skin of the dog are most often tumors or cysts arising from components that make up the skin, but they can also occur secondary to inflammatory or infectious processes as well. We will focus on tumors and cysts in this article. A tumor is basically an abnormal accumulation of cells that arise from the components of the affected organ. The abnormal accumulation of cells forms a nodular bump that can be felt or seen with the naked eye. When dealing with the skin, tumors can arise from any components of the skin. This can include cells in the outer layer of the skin, the epidermis, cells that make up hair follicles, cells that make apocrine glands (sweat glands), cells that make up the sebaceous glands, cells that comprise the supporting structures of the skin, or immune cells that tend to reside in the skin. Damage is occurring to cells all the time, and when this occurs, the body produces new cells to repair the damaged ones. There are several mechanisms to make sure when an injury occurs that more cells than are needed are not made; however, when there are errors in this process, excessive growth occurs, resulting in tumor formation. I will divide the basic tumor types of the skin into different categories for simplification.
Sebaceous gland tumors and hyperplasia
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214 – April, 2025
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