Overview of Fibrosarcoma of the Nasal and Paranasal Sinus

Nasal and paranasal sinus fibrosarcomas are slow growing, progressive, invasive tumors of the nose, nasal cavity and surrounding communicating recesses that can occur in dogs.

As with other tumors, the cause is unknown. These tumors are seen more commonly in dogs than cats and are seen in all ages, although it is most common in middle aged and older animals. Fibrosarcoma of the nasal and paranasal sinus are seen more commonly in the male and there is no breed predilection.

What to Watch For

Signs of nasal and paranasal sinus fibrosarcoma in dogs may include: 

Nasal discharge

Epistaxis (bleeding from the nose)

Epiphora (tearing from the eyes)

Sneezing

Halitosis (bad breath)

Anorexia

Facial deformity

Exophthalmia (bulging eye)

Seizures (secondary to aggressive tumors invading the brain)

Diagnosis of Nasal and Paranasal Sinus Fibrosarcoma

Complete blood cell count (CBC)

Biochemical profile

Urinalysis

Chest X-rays

Skull/nasal X-rays

Computed tomography imaging (CT scan) or magnetic resonance imaging (MRI)

Nasal bacterial culture

Rhinoscopy (scoping the nasal cavity) and biopsy

Rhinotomy (cutting into the nasal cavity) and biopsy

Biopsy is necessary for a definitive diagnosis

Treatment of Nasal and Paranasal Sinus Fibrosarcoma

Surgery in combination with radiation therapy

Radiation therapy

Chemotherapy

Antibiotic therapy may be helpful in controlling secondary infection

Anti-inflammatory drugs may help as temporary symptomatic therapy if more aggressive treatment is not pursued.

Home Care and Prevention

Administer all medication and follow recommendations by your veterinarian. Follow up as directed. If your pet’s condition is not improving and/or getting worse, seek veterinary attention at once.

Overall, nasal and paranasal fibrosarcomas are very aggressive, and carry a guarded prognosis.

There is no preventative care for fibrosarcoma.