Skin tumors in dogs are relatively rare clinically. Here are several clinically identifiable skin tumors:

1) Epidermoid cyst

This kind of tumor can occur in any part of the dog's body, but it mostly occurs on the back. The tumor is soft and brittle, and the contents are dry.

2) Sebaceous gland tumors

Benign tumors are more common in older dogs. The surface of the tumor is pale, solid, multi-lobulated, and hairless. If it appears in the dog's mouth, it may develop into an ulcer, and surgical removal has good results.

3) Breast cell tumor

Clinically, dog breasts are enlarged, pale, hard, smooth, and may form ulcers. Surgical resection resulted in good results.

4) Histiocytoma

Due to the rapid growth of the tumor, clinically rare nodules with obvious epidermal boundaries or local ulcers mainly occur on the face and feet of young dogs. This type of cell tumor can dissipate on its own.

5) Papilloma

It is more common in older dogs. Papillomaviruses have been reported to cause papillomas in dogs.

6) Basal cell tumor

 Most commonly occurs on the face and limbs. The tumor area grows slowly and may form ulcers, melanin, and melanoma.

7) Cutaneous lymphoma

Dogs with systemic lymphoma may develop subcutaneous lymphoma, which is manifested by redness, swelling, hair loss and dander on the skin. Further diagnosis requires tissue biopsy.

8) Melanoma

The tumor is black, hairless or less hairy. Generally, there is no inflammatory reaction, and surgical removal is effective.