RE: Miniaturized percutaneous nephrolithotomy versus retrograde intrarenal surgery in the treatment of renal stones with a diameter <15 mm: A 3‑year open‑label prospective study

I read with great interest the article “Miniaturized percutaneous nephrolithotomy versus retrograde intrarenal surgery (RIRS) in the treatment of renal stones with a diameter <15 mm: A 3‑year open‑label prospective study” by Mhaske et al. [1] This article highlights important findings regarding the safety and efficacy of both mini‑percutaneous nephrolithotomy (mini‑perc) and RIRS. In most of the previous similar comparative study, renal stone size <2cm was used as a cutoff point. It is an eye‑opening to reduce the size to <1.5cm and to compare the efficacy of both procedures. However, the other study by Suresh et al. taken a more specific size as cutoff point which was between 1 cm and 1.5 cm.[2] This will better prospective as moss of stone