title: Is aperistalsis with complete lower esophageal sphincter relaxation an early stage of classic achalasia?
abstract: BACKGROUND
  Aperistalsis with complete lower esophageal sphincter (LES) relaxation, characterized by the complete relaxation of the LES and aperistalsis of the esophageal body on manometry, has been considered by some authors to be an early manifestation of classic achalasia, which is defined as incomplete relaxation of the LES and aperistalsis of the esophageal body. The aim of the present study was to compare the clinical features of patients with aperistalsis with complete LES relaxation, with those of patients with classic achalasia.
  
  
  METHODS
  Eighteen patients with aperistalsis with complete LES relaxation and 53 patients with classic achalasia were analyzed with regard to clinical history, the maximal diameter of the esophageal body on barium esophagogram, LES resting pressure and the duration of LES relaxation on manometric recordings, and the selected treatment and its efficacy.
  
  
  RESULTS
  The aperistalsis with complete LES relaxation group had distinctly different features compared to those of the classic achalasia group including older age, more frequent association with non-cardiac chest pain, less frequent association with dysphagia and weight loss, lower LES resting pressures, and longer duration of LES relaxation. However, the two groups were similar in terms of maximal diameter of the esophageal body, and efficacy associated with pneumatic dilation.
  
  
  CONCLUSIONS
  Aperistalsis with complete LES relaxation on manometry is not necessarily an early manifestation of classic achalasia. However, this condition does not preclude a diagnosis of achalasia or a good response to achalasia therapy.
authors: Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
authors: Jeong Hwan
authors: JH
authors: Kim
authors: Poong-Lyul
authors: PL
authors: Rhee
authors: Sang Soo
authors: SS
authors: Lee
authors: Hyuk
authors: H
authors: Lee
authors: Yong Sung
authors: YS
authors: Choi
authors: Hee Jung
authors: HJ
authors: Son
authors: Jae J
authors: JJ
authors: Kim
authors: Jong Chul
authors: JC
authors: Rhee
mesh_terms: D000328:Adult; D002404:Catheterization; D004931:Esophageal Achalasia / Q000175:diagnosis* / Q000209:etiology; D015154:Esophageal Motility Disorders / Q000503:physiopathology*; D049630:Esophageal Sphincter, Lower / Q000503:physiopathology*; D004947:Esophagus / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D008297:Male; D008365:Manometry; D008875:Middle Aged; D009126:Muscle Relaxation / Q000502:physiology*; D010528:Peristalsis / Q000502:physiology*; D011859:Radiography; D012189:Retrospective Studies