All are true about achalasia except
Destruction of the nerves to LES is primary pathology and degeneration of neuromuscular function of the body of the esophagus is secondary. An absence of body peristalsis and poor LES relaxation is mandatory for diagnosisRef: Harrison; 19th edition
Dilatation of proximal segment
It predisposes to malignancy
Body peristalsis is normal
LES pressure is increased
C.V.S