Gross and microscopic examination of the resected PC specimen. (A) On gross examination, the cut surface revealed a peripherally cystic cavity-formed, relatively well-defined, and solid firm mass, measuring 32 × 27 × 25 mm, which looked from gray-yellowish to -whitish in color. This cystic cavity measured approximately 15 × 10 mm, filled with hemorrhagic materials. Bar = 5 mm. (B) A scanning magnification (H&E stains) revealed that the cancer lesions were partly surrounded by the cystic cavity (lt. side) but irregularly involved its wall in part (rt. side). There were neither extensive components of intraductal carcinoma nor lobular carcinoma areas within our thorough investigation. Bar = 5 mm.