M Desai, A De Lisa, B Turna, J Rioja… - Journal of …, 2011 - liebertonline.com ... S taghorn stones or calculi are branched kidney stones that occupy a large proportion of the renal pelvis and some or all of the renal calices. ... 3–6 Complete removal of the stone to relieve the obstruction and restoration of kidney function with minimal morbidity is the ...