“…However, in their analysis in relation to unilateral or bilateral stenting to palliate malignant hilar obstruction, their conclusions are not fully supported by the data provided. Their data for bilateral or unilateral hilar stenting are derived from 7 studies, 3 of which are fairly dated (Chang et al, 2 De Palma et al, 3 and Freeman and Overby 4 ) and provide their 30-day mortality data (Chang et al 2 and De Palma et al 3 ). There is no difference in the rates of adverse events between the 2 groups, and stent patency and survival were greater with bilateral stenting in more recent studies within the subset where this outcome data is available (Naitoh et al 5 and Liberato and Canena 6 ).…”