title: ["Mini-percutaneous" percutaneous nephrolithotomy: technique and indications].
abstract: OBJECTIVE
  Since Helal and Jackman developed the mini-percutaneous ("mini-perc") percutaneous nephrolithotomy (PCNL) for the treatment of pediatric renal lithiasis various authors have used is technique in adults with the aim to preserve renal parenchyma and diminish morbidity associated with the standard PCNL.
  
  
  METHODS
  We describe the surgical technique of "mini-perc" PCNL in the treatment of renal lithiasis.
  
  
  RESULTS
  We review various case series from the literature of "mini perc" PCNL for the treatment of adult renal lithiasis, its current indications, percentages of stone free patients, and associated problems, mainly the required instruments.
  
  
  CONCLUSIONS
  Morbidity associated with "miniperc" PCNL seems to be lower than with the standard PCNL, but the use a smaller calibre tract with the only aim to preserve renal parenchyma does not offer advantages. It is a complementary technique to the standard PCNL; however, the diameter of the percutaneous access is not well defined yet and depends on the calibre of the instruments used.
authors.affiliation: Servicio de Urología, Hospital Universitario de Getafe, Madrid, España. inmaculadafer186@hotmail.com
authors.forename: Inmaculada
authors.initials: I
authors.lastname: Fernández González
authors.forename: Daniel
authors.initials: D
authors.lastname: Santos Arrontes
authors.forename: Luis
authors.initials: L
authors.lastname: Llanes González
authors.forename: Gino
authors.initials: G
authors.lastname: Espinales Castro
authors.forename: Marcos
authors.initials: M
authors.lastname: Luján Galán
authors.forename: Antonio
authors.initials: A
authors.lastname: Berenguer Sánchez
mesh_terms: D006801:Humans; D019060:Minimally Invasive Surgical Procedures; D009403:Nephrostomy, Percutaneous / Q000379:methods*