I was told i have a cyst at the upper pole of my spleen. what does that mean?

Probably nothing: Congenital cysts are not uncommon, and occur in the liver, spleen, pancreas, and kidneys. If you have an isolated cyst which is not symptomatic, then you have little to worry about. Your doctor will help with any follow up imaging, but that should be minimal. Good luck.

Probably nothing: These are usually similar to the trivial cysts that folks get under their skin. If your physician is not concerned, i would not be either.

Needs watching.: Cysts found on the liver or spleen during a ct or ultrasound are quite common. They are usually benign growths, that are simply followed with a repeat scan. If it's not growing, it is left alone. Splenic cysts may be hereditary, related to trauma or parasitic infection but usually there is no clear explanation. Follow up but no worries - this is not a big deal.