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My cat's mouth lump disappeared. Is it serious or just a cyst?

Updated on September 23rd, 2025

Pet's info: Cat | Domestic Shorthair | Male | neutered | 5 years and 11 months old | 16 lbs

My cat had an oral lump corner of mouth, upper lip, hard and size of a pea found 3 days ago, since than it has completely disappeared, I can no longer feel it or find it at all. If it were a malignant tumor would it disappear completely? And, how on Earth would that be biopsied if it were no longer there? Can a cyst disappear? Can an oral abscess disappear?

1 Answer

Most Helpful Answer

Ricardo Fernandez, DVM

Answered By Ricardo Fernandez, DVM

Veterinarian, Veterinary Oncology Resident

Published on March 30th, 2018

Thanks for using Petco Pet Education Center, formerly Petcoach! If this disappeared then a cancer would very unlikely and a cyst or infection more likely so I would be more hopeful that that is the case. Continue to monitor Cheese and have him examined if this becomes evident again. Good luck and have a great day!
Vote Icon1Pet Parents found this answer helpful

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