Sebaceous tumors are more common in benign tumors in elderly dogs. The surface of the tumor is pale, solid, lobular, and hairless. If it appears in the dog's mouth, it may develop into ulcers and the surgical removal effect is good.
Breast cell tumors have clinically enlarged breasts, pale, hard, smoothness, and may form ulcers. The surgical resection is effective.
Histocyte tumors have rapid growth and rare clinically nodules with obvious epidermal boundaries or local ulcers, which mainly occur in the face and feet of young dogs. This type of cell tumor can dissipate on its own.
Aged dogs with papilloma are more common. Papillarvirus has been reported to cause papilloma in dogs. Basal cell tumors occur frequently on the face and limbs. The tumor area grows slowly and may develop ulcers, melanin calm, and melanoma.
Skin lymphoma Dogs with systemic lymphoma may develop subcutaneous lymphoma, which is expressed as redness, hair loss and dandruff. Further diagnosis requires tissue section examination.