It is more than likely it is cancerous. And can be treated only be seeing a vet. Mine had the same problem.
a turtle neck
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Any lump in your neck should be checked out by a physician to make sure it is nothing serious.
The lifespan of an African side neck turtle can reach above 25 years of age. These reptiles live in lakes, rivers and shallow pools.
Black-knobbed map turtle or an Alligator snapping turtle
A lump at the front of the neck could be inflamed lymph nodes, or an increase in one nodule of the thyroid gland which is a butterfly shaped organ in the neck belonging to the endocrine system. At the back of the neck a lump could be a muscle spasm or a problem with a spinal vertebra.
I believe it is the thoart
ganglionic or sebaceous? maybe lymphadenopathic of origin.
You should go and see a doctor to be on the safe side...
Im 13 and i have the exact same thing a lump on the left side of my neck it's really small .
It's a turtle's neck!
no