Basically, BC stands for before Christ and AD stands for Anno Domini, Latin for in the year of our Lord.. The transition point between BC and AD marks the approximate time when God incarnate came down to earth to live with His creation.
The only area that is involved is the spot direcly behind my right ear lobe where it sinks in, not futher behind where the gland or lymph node is. I have gotten swollen lymph nodes before, this is very different. My inner ear, and throat and all other surrounding areas aren't in pain at all.
Two days before I went in I woke up with a painful bump behind my left ear (couple fingers width behind ear lobe). It's been 6 days and it's still there although a bit less painful now. The surgeon who performed the operation also removed a lymph node which was found to contain cancer cells.