Surgical Endoscopy

, Volume 29, Issue 9, pp 2841–2850 | Cite as

Peroral endoscopic myotomy for advanced achalasia with sigmoid-shaped esophagus: long-term outcomes from a prospective, single-center study

  • Jian-Wei Hu
  • Quan-Lin Li
  • Ping-Hong ZhouEmail author
  • Li-Qing Yao
  • Mei-Dong Xu
  • Yi-Qun Zhang
  • Yun-Shi Zhong
  • Wei-Feng Chen
  • Li-Li Ma
  • Wen-Zheng Qin
  • Ming-Yan Cai
Dynamic Manuscript



The sigmoid-shaped esophagus is considered to be the advanced stage of achalasia, in which the esophageal lumen is significantly dilated, swerved, and rotated. In consideration of the efficacy of peroral endoscopic myotomy (POEM) for early achalasia, it may also offer another option for the treatment of advanced achalasia with sigmoid-shaped esophagus. Our purpose was to evaluate the feasibility and long-term efficacy of POEM for patients with sigmoid-type achalasia.


32 consecutive patients with sigmoid-type achalasia (S1 type in 29 patients and S2 type in 3 patients) were prospectively included. Primary outcome was symptom relief during follow-up, defined as an Eckardt score ≤3. Secondary outcomes were procedure-related adverse events, the resting lower esophageal sphincter (LES) pressure, clinical reflux complications, and procedure-related parameters.


All cases received POEM successfully. The mean operation time was 63.7 min (range 22–130 min). No serious complications related to POEM were encountered. During a mean follow-up period of 30.0 months (range 24–44 months), treatment success was achieved e in 96.8 % of cases (mean score pre- vs. post-treatment 7.8 vs. 1.4; P < 0.001). Mean LES pressure also decreased from a mean of 37.9 to 12.9 mmHg after POEM (P < 0.001). One patient experienced only partial symptom relief and additional balloon dilations were carried out to relief the symptoms twice. The overall clinical reflux complication rate of POEM for sigmoid-type achalasia was 25.8 %.


The 2-year outcomes of POEM for advanced achalasia with sigmoid-shaped esophagus were excellent, resulting in long-term symptom relief in over 96 % cases and without serious complications. The morphological changes of esophagus may make subsequent endoscopic tunneling more challenging and time-consuming, but do not prevent successful POEM.


Peroral endoscopic myotomy Sigmoid-shaped esophagus Advanced achalasia 



This study was supported by the grants from the Major Project of Shanghai Municipal Science and Technology Committee (11411950502 and 13411950801), Academic Leader Training Project of Shanghai Municipal Commission of Health and Family Planning (13B038), National Natural Science Foundation of China (81302098, 81370588, 81201902 and 81470811), and Natural Science Foundation of Shanghai (13ZR1452300).


Drs. Hu J.-W, Li Q.-L, Zhou P.-H, Yao L.-Q, Xu M.-D, Zhang Y.-Q, Zhong Y.-S, Chen W.-F, Ma L.-L, Qin W.-Z, and Cai M.-Y have no conflicts of interest or financial ties to disclose.

Supplementary material

Video 1

An example of the peroral endoscopic myotomy (POEM) procedure for a 49-year-old man with sigmoid type achalasia (WMV 53319 kb)


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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Jian-Wei Hu
    • 1
  • Quan-Lin Li
    • 1
  • Ping-Hong Zhou
    • 1
    Email author
  • Li-Qing Yao
    • 1
  • Mei-Dong Xu
    • 1
  • Yi-Qun Zhang
    • 1
  • Yun-Shi Zhong
    • 1
  • Wei-Feng Chen
    • 1
  • Li-Li Ma
    • 1
  • Wen-Zheng Qin
    • 1
  • Ming-Yan Cai
    • 1
  1. 1.Endoscopy Center and Endoscopy Research Institute, Zhongshan HospitalFudan UniversityShanghaiChina

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