Does the patient require further investigation for his condition?
No. This case demonstrates a simple renal cortical cyst (Bosniak I) which typically doesn't require any further investigation.
What could the possible differential diagnosis include?
The differential diagnosis includes, but is not limited to: Cyst, Tumor, Lymphoma, Abscess, Aneurysm/pseudoaneurysm.
There is a simple cortical cyst 63 x 57 mm seen at the lower pole of the left kidney.
Enlarged prostate.