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Should My Dog Have Lung Surgery for a Lung Tumor?

by Stephanie

Reader Question
An X-ray shows my Sheltie has a tumor the size of a small orange in his right lung. His first sign was coughing up blood. Since starting steroids and antibiotics, the coughing has stopped and he seems perfectly healthy. The internist says my options are a CT scan to check that it hasn't spread, then probably removing the whole right lung, at great expense and, I imagine, great pain for my dog. He says this would give him a year or so. It seems selfish to put him through surgery only to face the cancer again later. Can you give me a good reason to go ahead with every treatment available? This is the hardest decision I've ever had to make.


Answer from Our Team

This is a hard decision, and either choice can be the loving one. Here's what may help you weigh it. Surgery to remove the affected lung lobe is the main treatment for a single primary lung tumor. A CT scan first is recommended because it's much better than X-rays at finding small spots of spread, and if it finds spread, surgery is usually not advised.

Outcomes depend mostly on tumor size and whether the lymph nodes are involved. In a 2025 European study, dogs with tumors 5 cm or larger lived a median of about 9 months after surgery, compared with nearly 2 years for smaller tumors, and dogs with lymph node spread did worse. Complications happened in about 12% of dogs. Pain after surgery is usually managed with several medicines together, and in some cases less invasive keyhole surgery is possible.

Choosing not to have surgery is also a reasonable, caring choice. Steroids and antibiotics can keep some dogs comfortable for a time, and a quality of life scale can help you track how he's doing. Ask your internist about his likely outlook with and without surgery, what recovery would look like, and a written cost estimate.

See lung cancer in dogs and quality of life and when to say goodbye.

This is general information, not a diagnosis. Please follow your own vet's advice.

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