Head And Neck Tumors

Question 1

Common in cats (~15% of skin tumors), this tumor’s classic manifestation is in lightly pigmented victims as a result of solar damage, and progresses from crust/erythema to superficial ulcers and deep erosive lesions…

Answer 1

Nasal Planum Tumors
acc. By history of failed empirical Tx (Antibiotics/steroids/topicals)

Common lesions:
Eyelids (20%)
Pinna (50%)

Question 2

In a light-pigmented cat with a nasal planum tumor, what are our differentials (from most likely to least)?

What about nasal planum tumors in dogs?

Answer 2

SCC—>LSA—>eosinophilia granuloma—>MCT

SCC—>MCT—>fibrosarcoma

Question 3

If you are suspecting a nasal planum tumor, what are you going to do as far as work-up/staging?

Answer 3

Cytology likely NOT effective;
Biopsy is generally needed for tissue Dx (must be careful; take these biospies minimally and centrally, as opposed to typical protocol)
— need to be under anesthesia for biopsy***

Question 4

What are the top differentials for ear canal tumors?

Answer 4

CERUMINOUS gland adenocarcinoma
cats have a tendency to develop malignant dz more than k9

Other carcinomas (SCC, undifferentiated)

Question 5

Negative Prognostic Factors for ear canal tumors?

Answer 5

1. Extension beyond ear canal - MST: 30m vs. 6m (k9) and 22m vs. 4m (fel)
2. Dx of SCC or undifferentiated carcinoma - MST: 49m if ceruminous vs. 6m if undifferentiated vs. 4m if SCC (fel)
3. Neuro signs at Dx - MST: 16m vs. 1.5m (fel)
4. PO histologic criteria (vascular/lymphatic invasion, hi mototic index)

Question 6

Regarding sinonasal tumors, dogs are more likely to be afflicted with _______; whereas cats are more likely to be afflicted with ________.

Answer 6

Carcinoma;

Lymphoma