Hello,
I have reviewed the pics and the cyst is a simple cyst and you don't need to worry about it.
Hope this answers your question, please feel free to discuss further.
Take care
Sincerely
Dr Rajiv Goel
MS (AIIMS), MCh (AIIMS), DNB ( Uro)
Fellow, Urooncology and Robotic urology, Australia
Fellow, Laparoscopic urology, Germany