10 mm means a 1 cm and PCNL would be an overkill for it especially when it is a silent stone without symptoms.
PCNL is straight forward in cases of stones bigger than 2 cm, but anything below that other options should be considered.
The two options we have is ESWL and Laser lithotripsy
Although ESWL is not always successful in cases of lower pole stones, because the fragments may never drain off from the kidney due to the dependent position.But it is least invasive with minimal complications.
Next option is RIRS - going with a ureteroscope and fragmenting it with a laser.This is the best option in the hands of an experienced doctor.It is time consuming as well as an expensive option, but complication profile is minimal.
PCNL is key hole surgery with risk of bleeding and some loss of kidney mass.Rest is advised for 2 weeks after the surgery.Where as in previous two options no rest is recommended.
Newer techniques like Mini PERC and Micro -PERC are still in early phase of development and everyone may not be well versed with it.
I hope this answers your question.