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Why is there a bleeding, shrinking lump on my mare's foot?

Updated On September 23rd, 2025

Pet's info: Farm Animal | Horse | Female | 12 years and 10 months old

This recently showed up on my mares foot. It was bigger and bled, but it has shrunk. What is it?

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1 Answer

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Answered By Julie Settlage, DVM, DACVS-LA, CVA

Veterinarian, Board-Certified Veterinary Surgeon (large animal), Certified Veterinary Acupuncturist

Published on November 7th, 2017

Thanks for using pet coach! This is a hard picture to interpret - but it appears that there may be an injury to the coronary band with a 'mass' there. You need to have a veterinarian take a good look at it - if it were me, I would clean the foot up completely which will allow me to better evaluate it. I would also like to take radiographs of the area to see if there is any bony involvement underneath the mass. In addition, I would like to assess if Cayenne has any lameness in this foot/leg. I would be suspicious that this mass is granulation tissue (best case scenario) secondary to an old wound, but it could also be a type of cancer (sarcoid or squamous cell carcinoma would be high on my suspicion list). I would recommend taking a biopsy to figure out what the mass is and thus the course of treatment. All of those potential diagnoses easily bleed and can look similar. So please find a veterinarian to come and examine Cayenne soon. Thank you for using pet coach!

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