Can you tell me about ganglion cyst on the underside of the wrist and had surgery to remove it only to have it come back on the top side of the wrist?

Common. This is not the same cyst. There are approx. Ten small bones in the wrist. Each of them have a synovial capsule that could rupture and produce a ganglion cyst on the undersurface or top surface of the wrist. Ask your doctor if your activity or use of wrist is promoting this kind of formation.