[MD Expat in PA]

Probably a lipoma.

You can look up

Removing a Stubborn Lipoma Off Patient’s Neck | Dr. Pimple Popper

on You Tube if you’re not squeamish. :)

[Carriage Hill]

It was a lipoma. My sister, RN-NP, operated on a number of them, at the Kaiser Permanente clinic at UCSF, but I’d forgotten the medical name. Thx.