“…These results compare unfavourably with the incidence of complications and subsequent morbidity from both PCNL and ESWL (Segura et al, 1985;Das et al, 1987;Lingeman et al, 1987;Payne and Webb, 1988). PN is also an ablative procedure, approximately 20% of the renal mass being removed by polar resection (Rose and Follows, 1977), whilst the overall nephron loss has not been determined. In contrast to this, it has been shown that there are no long-term anatomical consequences of PCNL as determined by CT scanning (Marberger et al, 1985) and no appreciable nephron loss from radioisotope and morphological studies (Marberger et al, 1985;Webb and Fitzpatrick, 1985).…”