Absent testicles

Hey everyone, just wanting to get a little insight if possible. My 16 month old had been diagnosed with bilateral undescended testicles. We went today for his surgery and the surgeon found that he did not have undescended testicles as he previously thought, that his testicles were in the scrotum as they should be and were under developed/nubbins. Has anyone else gone through this with their little ones? Just trying to get insight as to what to expect in the future. Thanks in advance!