Radiation therapy
for nasal carcinoma
in dogs — Florida.
Nasal adenocarcinoma is the most common nasal tumor in dogs — and one of the most radiation-responsive. Radiation therapy is an established treatment option, with consistent results across published studies.
Why radiation therapy is the primary treatment
— not surgery.
Nasal adenocarcinoma arises within the nasal cavity — a space bounded by bone on all sides and adjacent to the brain, orbits, and hard palate. This anatomy, which makes surgery extremely difficult, actually works in radiation's favor: the tumor sits in a well-defined location that can be precisely and repeatedly targeted.
The most common presenting signs — unilateral nosebleed (epistaxis), nasal discharge, facial swelling, and difficulty breathing through one nostril — often appear months before the diagnosis is confirmed. By the time histopathology confirms carcinoma, the tumor has typically invaded adjacent bone. Radiation therapy can precisely target the tumor within this confined space.
What the evidence shows
Published retrospective studies report median survival of roughly 13–19 months in dogs treated with radiation therapy. The addition of chemotherapy in select cases may further improve outcomes.
What CT reveals — and why it changes treatment
CT imaging of the skull is essential before any treatment decision. It maps exact tumor extent, bone destruction, cribriform plate involvement, and orbital invasion — information that determines the radiation field and influences prognosis. CT of the thorax is also performed to evaluate for pulmonary metastasis, which is uncommon early but relevant to treatment planning.
Scientific references.
The clinical information on this page is grounded in peer-reviewed veterinary radiation oncology literature.
- Fox-Alvarez S, Shiomitsu K, Lejeune AT, Szivek A, Kubicek L (2020). Outcome of intensity-modulated radiation therapy–based stereotactic radiation therapy for treatment of canine nasal carcinomas. Vet Radiol Ultrasound.
- Mayer MN, et al. (2019). Outcomes and adverse effects associated with stereotactic body radiation therapy in dogs with nasal tumors: 28 cases (2011–2016). J Am Vet Med Assoc. 254(5):602.
- Gieger TL, Nolan MW (2018). Linac-based stereotactic radiation therapy for canine non-lymphomatous nasal tumours: 29 cases (2013–2016). Vet Comp Oncol.
- Hunley DW, Mauldin GN, Shiomitsu K, Mauldin GE (2010). Clinical outcome in dogs with nasal tumors treated with intensity-modulated radiation therapy. Can Vet J. 51:293.
- Czichon F, Rohrer Bley C, Meier V (2021). Relative tumor volume has prognostic relevance in canine sinonasal tumors treated with radiation therapy: a retrospective study. PLoS ONE.
- Fu D-R, et al. (2023). Retrospective comparison of side effects and outcomes of three-dimensional conformal vs. intensity-modulated radiation therapy in the palliative-intent treatment (4 Gy × 5 daily fractions) of canine intranasal tumors (2010–2017). Front Vet Sci. 10:1011949.
Prompt response.
Dr. DiBernardi is on site and personally reviews every case. Tell us about your dog and we'll respond promptly with a clear recommendation.
Request a Consultationnasal carcinoma.
Submit a referral and receive prompt acknowledgment. We coordinate directly with your practice throughout treatment and provide full written reports.
Referral Information →