Which is not pre-malignant at some site -

Bronchiectasis is not a premalignant condition. Cholelithiasis predisposes to carcinoma Gallbladder Ulcerative colitis predisposes to :           (a) colorectal cancer-Sabiston 16th/ep. 953 (b) cholangiocarcinoma. Leukoplakia: Predisposes to squamous cell carcinoma at the respective site.