Fibroadenoma in dogs: what to know

Dogs can develop lumps along the mammary chain, which runs from the chest toward the groin. A lump may be influenced by hormones, inflammation, or another type of growth. Its texture or location cannot reliably identify it, and a diagnosis used for a person should not be assumed to apply to an animal.

A veterinarian may inspect the skin and mammary glands, feel nearby lymph nodes, and recommend imaging or a tissue sample. Human resources about [Breast Ultrasound](/treatments/diagnostics-and-imaging/breast-ultrasound/) and [Breast Biopsy](/treatments/diagnostics-and-imaging/breast-biopsy/) explain general procedures, but your dog’s care plan must come from a veterinary professional.

Arrange a veterinary appointment and record the lump’s location, size, surface changes, and whether your dog licks or guards it. Do not squeeze, puncture, or apply human creams. Tell the veterinarian whether your dog is female or male, neutered, taking hormones, eating normally, and behaving as usual.

The veterinarian may recommend monitoring, sampling, or removal based on the examination. If surgery is proposed, ask how the tissue will be examined and what aftercare is needed. Do not delay assessment while trying to match the lump to a human diagnosis.

Contact a veterinarian promptly if the lump is enlarging, bleeding, ulcerated, hot, painful, or producing discharge. Urgent care is appropriate when your dog is weak, has breathing difficulty, repeated vomiting, marked pain, or stops eating.

Ask what structures are involved, whether a sample is needed, how quickly the result is expected, whether nearby nodes should be checked, and how to protect the area at home.