Fluorescence in situ hybridization for the detection of malignant bile duct strictures: has FISH found a new pond?

Routine cytology for the diagnosis of biliary and pancreatic malignancies has exceptionally poor sensitivity and has spurred a search for new technology in the evaluation of these diseases. The recent study by Kipp et al. in this issue of the Journal, compares one of these novel techniques (fluorescence in situ hybridization to standard cytology) for the detection of malignant biliary strictures. Although larger studies are indicated, the modality shows considerable promise for future clinical use.