Thanks for your query.
If she Is asymptomatic , she might not need any active Intervention.
If she develops symptoms like pain In loin or hematuria
, you need to consult a urologist
means a swelling which Is hollow like balloon.
Cortical means It Is placed In the outer layer of kidney
Even the size of the cyst matters which you have not mentioned about.Hope I have answered your query
I will be available for your follow up queries If any.
Wishing you good health.