Lymphoma in cats
Lymphoma is the most common cancer in cats, and it often affects the intestines.
Last updated: October 2026 · 3 sources · see sources
Signs to watch for
- Weight loss
- Vomiting
- Diarrhea
- Poor appetite
- Sometimes breathing trouble
Trouble breathing, collapse, repeated vomiting, not peeing, or a seizure that lasts more than a few minutes needs a vet right away. See when to see a vet.
How vets diagnose it
Ultrasound and biopsies or needle samples are used to diagnose it. [3]
How it's treated
Low-grade intestinal lymphoma is often treated with oral chlorambucil and prednisolone. Higher grades need injectable chemotherapy. [3]
Medicines your vet may mention: Chlorambucil (Leukeran), Prednisone & Prednisolone. We don't list doses; your vet will decide what fits your pet.
What it costs to diagnose and manage
| Item | Typical US price | Src |
|---|---|---|
| Diagnosis (exam and tests) | $500–$1,500 | [1] |
| Treatment | $2,000–$6,000 | [1] |
| Lymphoma chemotherapy, cat (CareCredit) | $4,269 | [2] |
These are typical US ranges from the sources listed. Your pet's costs depend on how severe things are, the tests your vet recommends, your pet's size and where you live. Ask your vet for a written estimate.
Outlook
Low-grade lymphoma often responds well for a long time. [3]
Common questions
What is lymphoma in cats?
Lymphoma is the most common cancer in cats, and it often affects the intestines.
What are the signs of lymphoma?
Common signs include: weight loss, vomiting, diarrhea, poor appetite, sometimes breathing trouble.
How do vets diagnose lymphoma?
Ultrasound and biopsies or needle samples are used to diagnose it.
How is lymphoma treated?
Low-grade intestinal lymphoma is often treated with oral chlorambucil and prednisolone. Higher grades need injectable chemotherapy.
How much does lymphoma cost to treat?
Diagnosis (exam and tests): $500–$1,500; Treatment: $2,000–$6,000; Lymphoma chemotherapy, cat (CareCredit): $4,269. Costs vary with severity, tests, your pet's size and where you live.
Related
This page is general information for pet owners, not veterinary advice. Talk to your vet about your own pet.