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Fibrosarcoma in Dogs (Nasal and Paranasal Sinus)

By: Dr. Bari Spielman

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

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

  • 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

  • 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

  • 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.

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