Fig. 1

A 45-year-old female patient with yellow nipple discharge for 1 month. Comparison of ultrasound sonogram and fiberoptic ductoscopy for intraductal papilloma was performed. Sections from A the long and B the short axes in conventional two-dimensional ultrasound revealed local ductal dilation (short arrow) in the 3 o'clock direction in the right breast, with solid isoechoic nodular filling (long arrow) in the distal lumen of the dilated segment. Fiberoptic ductoscopy C showing dilation of the breast duct with smooth ductal walls and one light yellow wart-like neoplasm obstructing the lumen