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Mammary Tumor

Mammary Tumor
© System

Overview

Breast cancer is the most common tumor in unspayed female dogs. 50% are malignant. In cats, 85% are malignant and highly aggressive.

Key / Hallmark Signs

  • Lumps/bumps
  • Severe bleedingEmergency
  • Open wound
  • Weight loss
  • Coughing
  • Ulcers
  • Swollen mammary glands

Common / Supporting Signs

  • Pain on touch
  • Pain

What to do?

This condition requires veterinary attention.

If your animal shows the Key or Common signs listed, please visit a clinic immediately.

Report Case / Get Help

Medical Details

Transmission

Hormonal/Genetic. Not contagious.

Progression & Stages

Hard lumps in mammary chain. Metastasis to lungs is the main cause of death.

Diagnosis

Biopsy. Chest X-rays to check for spread before surgery.

Treatment Protocols

Surgical removal (Mastectomy). Spaying at time of surgery.

Prevention

Spaying before the first heat cycle reduces risk to <0.5%. Spaying after 2nd heat offers little protection.

Prognosis

Dogs: 50/50 benign/malignant. Cats: Poor (median survival <1 year).

Medical References

  • ACVS, VCA Hospitals

Medical DisclaimerThis information is for education only and does not replace examination, diagnosis, or treatment by a qualified veterinarian.