My dog has a growing, hard, hairless lump. What could it be?

Question

My dog de bordaeux has a hairlezs hard lump growing for a week gettin bigger what could thia be, it does not hurt or irritate him. Pet's info: Dog | Dogue de Bordeaux | Male | unneutered | 8 months and 15 days old

Shaneez Wallani, DVM · Accepted Answer

Without further testing, there is no way to tell if this growth is a malignant (cancerous) type that can spread elsewhere and/ or invade the healthy tissue around them, or a more benign (noncancerous) type that is unlikely to spread. In some cases abscesses can form due to infection, or bumps can form due to trauma/pressure on the area or due to allergies, but in this case the picture appears to be a raised mass of some sort. I recommend making an appointment to see your vet to have the growth tested. In many cases this can be done using a fine needle aspirate, where cells are removed from the growth using a needle and examined under a microscope to determine what it is and to guide treatment. In some cases further testing may be needed to determine the necessary course of treatment, but it is important to get new growths tested in a timely manner, as some can be cancerous and quite aggressive in their growth, and growths due to infection, allergy or trauma can lead to complications or be indicators of underlying health problems. In the meantime, if Rudy begins licking the area, make sure he wears a “cone” (also known as an e-collar or Elizabethan collar) at all times when he is not being directly supervised by you, including while sleeping to help prevent infection.

My dog has a growing, hard, hairless lump. What could it be?

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