Fig. 2

(A-B) Case 1 (A) and 2 (B): CT scan and three-dimensional image show HSK with right renal calculi of the patients. Yellow dashed line indicates the isthmus dividing line in (B). (C) calculus being removed from the right kidney. (D) pyeloplasty being performed. (E) The endoscopic linear stapler is fired. (F) The isthmus is divided