Hi, On a recent ct scan I have a punctate, subcentimeter cystlike lesion within the right renal midpole which is too small to characterize.  Is this something I should be concerned with? Also, there is a 7 mm sclerotic density within the right sacral ala that may represent a bone island.  Again, is this something I should be concerned with?
Welcome to the forum. These may be small cysts and need only yearly followup scans. Bone islands are common findings and are usually of no significance. Hope this helps. Best regards