Achalasia is associated with increased risk of ...... malignancy:
Squamous cell carcinoma esophagus
Adenocarcinoma esophagus
Bronchogenic carcinoma
Bronchial adenoma
Prolonged stasis esophagitis in achalasia is the likely explanation for the association between achalasia and esophageal squamous cell cancer. Squamous cell cancer esophagus risk is increased 17-fold in achalasia cardia. Ref: Harrison, Edition-18, Page-2432