A ten-year-old female spayed Persian cat is presented for evaluation of a bleeding lump. There is a two-cm diameter, firm, solitary, hairless, dome-shaped, ulcerated mass on her left neck just behind the jaw that is bleeding.

Cytology obtained by fine needle aspirate reveals reveals cohesive clusters of large cells with round to oval nuclei that are tightly adherent to each other (see below).

Click the labwork icon to review hematology, blood chemistry and urinalysis test results.

Based on these findings, which choice is the most appropriate treatment option?

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