Final answer:
Proteinuria is the lab finding most likely associated with IG A nephropathy and deposits in the kidneys.
Step-by-step explanation:
The lab finding that is most likely associated with IG A nephropathy and deposits in the kidneys is proteinuria. Proteinuria is the presence of excess protein in the urine, and it can be a sign of kidney damage or disease. In cases of IG A nephropathy, there may be an increase in the amount of IGA (immunoglobulin A) protein in the urine.