Comment on

• Large balloon dilation vs. mechanical lithotripsy for the management of large bile duct stones: a prospective randomized study.

  Stefanidis G, Viazis N, Pleskow D, Manolakopoulos S, Theocharis L, Christodoulou C, Kotsikoros N, Giannousis J, Sgouros S, Rodias M, Katsikani A, Chuttani R. Stefanidis G, et al. Am J Gastroenterol. 2011 Feb;106(2):278-85. doi: 10.1038/ajg.2010.421. Epub 2010 Nov 2. Am J Gastroenterol. 2011. PMID: 21045816 Clinical Trial.
• Endoscopically applied radiofrequency ablation appears to be safe in the treatment of malignant biliary obstruction.

  Steel AW, Postgate AJ, Khorsandi S, Nicholls J, Jiao L, Vlavianos P, Habib N, Westaby D. Steel AW, et al. Gastrointest Endosc. 2011 Jan;73(1):149-53. doi: 10.1016/j.gie.2010.09.031. Gastrointest Endosc. 2011. PMID: 21184881 Clinical Trial.
• Outcomes of endoscopic transpapillary gallbladder stenting for symptomatic gallbladder diseases: a multicenter prospective follow-up study.

  Lee TH, Park DH, Lee SS, Seo DW, Park SH, Lee SK, Kim MH, Kim SJ. Lee TH, et al. Endoscopy. 2011 Aug;43(8):702-8. doi: 10.1055/s-0030-1256226. Epub 2011 Mar 21. Endoscopy. 2011. PMID: 21425042 Clinical Trial.
• Is the addition of choleretic agents in multiple double-pigtail biliary stents effective for difficult common bile duct stones in elderly patients? A prospective, multicenter study.

  Lee TH, Han JH, Kim HJ, Park SM, Park SH, Kim SJ. Lee TH, et al. Gastrointest Endosc. 2011 Jul;74(1):96-102. doi: 10.1016/j.gie.2011.03.005. Epub 2011 Apr 30. Gastrointest Endosc. 2011. PMID: 21531412 Clinical Trial.
• Single-operator cholangioscopy in patients requiring evaluation of bile duct disease or therapy of biliary stones (with videos).

  Chen YK, Parsi MA, Binmoeller KF, Hawes RH, Pleskow DK, Slivka A, Haluszka O, Petersen BT, Sherman S, Devière J, Meisner S, Stevens PD, Costamagna G, Ponchon T, Peetermans JA, Neuhaus H. Chen YK, et al. Gastrointest Endosc. 2011 Oct;74(4):805-14. doi: 10.1016/j.gie.2011.04.016. Epub 2011 Jul 18. Gastrointest Endosc. 2011. PMID: 21762903