title: ACHALASIA OF THE ESOPHAGUS: PATHOLOGIC AND ETIOLOGIC CONSIDERATIONS.
mesh_terms: D001933:Brain Stem; D004583:Electrons; D004931:Esophageal Achalasia; D004947:Esophagus; D006652:Histological Techniques; D008853:Microscopy; D008854:Microscopy, Electron; D009474:Neurons; D010336:Pathology; D014630:Vagus Nerve
keywords: BRAIN STEM; CARDIOSPASM; ESOPHAGUS; HISTOLOGICAL TECHNICS; MICROSCOPY, ELECTRON; NEURONS; PATHOLOGY; VAGUS NERVE