Achalasia is associated with increased risk of ...... malignancy:
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
Squamous cell carcinoma esophagus
Adenocarcinoma esophagus
Bronchogenic carcinoma
Bronchial adenoma