👉 Coeloma, also known as a benign tumor in dogs, is a type of cancer that affects the skin and soft tissues of the dog. It occurs due to an abnormal growth of cells called keratinocytes, which are responsible for the structure of the skin and other connective tissue. Coelomas can occur anywhere along the body, but they are most common on the face, neck, and chest. Coelomas usually appear as a white or pale yellow mass that grows slowly over time