The findings of ultrasound sonography and MRI scanning at surgery, or gross and microscopic examination of the resected intraductal fibroadenoma specimen. (A) Ultrasound sonography demonstrated an intracystic well-circumscribed tumour lesion, measuring 22.5 × 21.5 × 11.3 mm in diameter, consisted of a homogeneously solid component with a small amount of surrounding echo-free cystic space (arrows) and overt posterior echo enhancement. Bar = 1 cm. (B) MRI showed a mostly homogeneous and hyperintense (white) intracystic well-demarcated nodule partly in a multi-lobulated fashion adjacent to the nipple (arrowhead) on T2-weighted images. Bar = 1 cm. (C) On gross examination, the cut surface revealed a well-circumscribed and encapsulated, peripherally cystic thin cavity-formed, and multi-lobulated soft nodule, measuring 23 × 21 mm in diameter, which looked whitish to yellowish in color and displayed a marked gelatinous appearance. Bar = 1 cm. (D) A scanning magnification (H&E stains) showed that the tumor consisted of multiple polypoid papillary lesions in an intracanalicular or leaf-like fashion, partly surrounded by the thinned cystic cavity and displaying the peripheral growth into the terminal ductules (arrowheads). Bar = 1 cm.
Hayano et al. Diagnostic Pathology 2014 9:32 doi:10.1186/1746-1596-9-32