+ General Considerations

  • Benign tumor arising from basal cells of the epidermis, hair follicles, or sweat or sebaceous glands
  • Basal cell carcinomas may be induced by ultraviolet radiation
  • Sites: head, neck, and shoulders
  • Gross appearance: solitary, well-circumscribed, freely movable, and pigmented, solid, or cystic ± ulcerated in cats
  • Metastasis is rare but local tumor recurrence after incomplete excision is possible
  • Treatment: surgery or cryosurgery (if < 1 cm)
  • Prognosis: excellent

+ Feline Basal Cell Carcinoma

  • Basal cell carcinomas are more common in cats (representing 11%-28% of skin tumors and 3%-6% of all feline tumors) and is the most common melanotic tumor of cats
  • Mean age 10-11 years
  • No breed or sex predilection
  • Histologic subclassification: solid, cystic, ribbon, and medusoid
  • Basal cell carcinomas have a benign biologic behaviour
  • 10% are classified as malignant but 1% (1/97) local tumor recurrence rate and 0% (0/124) metastasis rate
  • Malignant basal cell carcinoma has been reported in 2 cats