The surgical procedure used most frequently for small tumors involves removing the tumor and applying cryotherapy (freezing probe) to the eyelid area where the tumor originated. The freezing procedure is quite effective at preventing local recurrence of the tumor and the procedure is performed under sedation and local eyelid block only BUT it only works for very small tumors. Larger tumors, which have invaded the entire thickness of the eyelid, require more involved procedures. These involve removing a wedge of the eyelid with the tumor and then suturing / reconstructing the eyelid back into place. Once removed, eyelid tumors may be submitted for biopsy.
It is recommended to act fast : the surgery will be faster , easier and the result better if the mass is still fairly small.

in a dog
after surgical removal