Hello, this is Dr. E. Greetings from New York! I'm so glad you posted your question for me to answer, and I aim to provide you with accurate info.
Good day madame! I've reviewed your case and here are my recommendations
Renal cysts: You should get a renal biopsy performed under sedation to rule out cancer, although most renal cysts are not cancerous.
Abdominal aortic aneurysm: You will need repeat abdominal ultrasounds to make sure the aneurysm is not getting any larger. If you have high blood pressure it needs to be well controlled.
Diverticulosis: Eat plenty of fruits and vegetables and fiber and fluids; increase these in your diet to help stop the formation of further diverticula. Be wary of abdominal pain and fever in your left lower abdomen - this is diverticulitis!
I hope this helped,
Your general practitioner can handle all of these issues, but will probably refer you out to a surgeon or pathologist for the biopsy.