PMC7318826_01
Microscopic findings of the biopsy specimen and macroscopic and microscopic findings of the surgical specimen. (a) In the biopsy specimen, myxoid stroma with low cellularity and mammary ducts without atypia were observed. (b) The cut surface of the surgical specimen revealed a remarkably cystic and well-circumscribed lesion with an intracystic polypoid component, measuring 4.0 x 3.0 cm2 in diameter with a whitish to tan color and hemorrhage. (c) and (d) On a microscopic study of the surgical specimen, the intracystic component showed a variety of findings of epithelial and stromal proliferation. (c) A pericanalicular pattern, an intracanalicular pattern, and a leaf-like structure with stromal growth, and (d) proliferation of small tubular structures were observed. (a) Bar = 200 mum (H&E staining; original magnification: x100). (c) and (d) Bar = 1.0 mm (H&E staining; original magnification: x12.5).
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fig1-2050313X20927612
A core needle biopsy was performed showing hypocellular myxoid stroma with small spindle cells and mammary ducts without atypia (Figure 1(a)). On a macroscopic study, the cut surface of the tumor revealed a remarkably cystic and well-circumscribed lesion with an intracystic polypoid component, measuring 4.0 x 3.0 cm2 in diameter with a whitish to tan color and hemorrhage (Figure 1(b)). Microscopically, a variety of findings of epithelial and stromal proliferation, such as a pericanalicular pattern, an intracanalicular pattern, and a polypoid or leaf-like structure with stromal growth, and proliferation of small tubular structures were observed (Figure 1(c) and (d)).