Veterinary Society of
Surgical Oncology

General Considerations

  • apocrine sweat gland tumors are more common as eccrine sweat glands only occur in the footpads
  • apocrine glands are numerous throughout the body and they are subclassified according to their location
  • sweat gland tumors account for 3.6%-9.0% of feline skin tumors and 2.0% of canine skin tumors
  • ADC (50%-90%) is more common than adenoma

Sweat Gland Cysts

  • common and contain serous material
  • site: head

Sweat Gland Adenomas

  • mean age > 8 years
  • sex predisposition: male
  • breed predisposition: Cocker Spaniel
  • gross appearance: cystic with minimal inflammation and no ulceration in cats, and solitary, well-circumscribed, and slow growing with ulceration common (> 50%) in dogs
  • 25% have evidence of lymphatic infiltration
  • sites: head and neck
  • treatment: surgery
  • prognosis: good

Sweat Gland Adenocarcinoma

Feline Sweat Gland Adenocarcinoma

  • mean age > 12 years in cats
  • sites: head
  • prognosis: guarded with metastasis reported to regional lymph nodes, digits, liver, and lung

Canine Sweat Gland Adenocarcinoma

  • mean age > 8 years in dogs
  • breed predisposition: Golden Retriever
  • sites: back, flank, and feet in dogs
  • prognosis: guarded to good in dogs with 8.3% local tumor recurrence rate and metastasis rare


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