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Flashcards in Exam 7 L. 14 Deck (10):

Nasal tumors

1)**most are malignant**
2) uncommon
3) should be on DDX list for nasal discharge in older dogs and cats
4) dog average age is about 10 years
5) Dolichocephalic breeds predisposed 2-3x increased if they live in a smoking household
6) risk increases 2-4x with use of kerosene/coal heaters indoors

NOTE: urban lifestyle, kerosene/coal burning heaters, secondhand smoke: increase the risk for nasal tumors for dogs and cats!


Most common nasal tumors

Carcinomas (70%) >fibrosarcoma >chondrosarcoma >osteosarcoma


Nasal tumor clinical presentation

1) intermittent, progressive, chronic nasal discharge
2) epistaxis, mucopurulent
3) unilateral >bilateral
4) CNS signs (if nasal tumor is near cribiform plate, will have seizures and no epistaxis)
5) nasal cavity obstruction, Stertor
6) facial deformity, dyspnea
7) cough


Nasal tumor possible differential list

Differentials: tooth root abscess, inflammatory polyp, fungal/bacterial infection, lymphoplasmacytic rhinitis, coagulopathies



1) physical exam and good oral exam
2) check airway patency
3) pre-biopsy coagulation tests
4) evaluation of nasal exudate is valuable
5)*rhinoscopy with biopsy*
6) advanced imaging is more accurate than just radiographs


Radiographic signs of nasal tumor

Most common sign is loss of turbinate detail (this can also be caused by fungal infection)



Cribiform plate is close to the level of the medial canthus of the eye



Forceful nasal flushing ==> increases breathing ease and is a palliative procedure



1) surgery alone: outcome similar to no therapy/may make it worse
2) *radiation therapy*: 20 months


Feline nasal tumor

1) lymphoma >carcinoma
2) radiation therapy 1st choice for cats
-lymphoma: RT plus CHOP therapy: MST 2-3 years