PMC8081107_01
Grayscale ultrasound shows a heterogeneous irregular mass with spiculated margin (arrowheads)
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F1
Greyscale ultrasound revealed a heterogeneous hypoechoic mass with irregular shape and spiculated margin [Figure 1].
On craniocaudal view of full-field digital mammography, a 1.5 cm irregular isodensity mass with obscured margin is noted at the posterior lower inner region of the right breast (arrowheads)
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F2
Full-field digital mammography [Figure 2] and breast tomosynthesis showed an isodensity irregular mass with an obscured margin.
(a) High-power picture shows low-grade tumor glands with eosinophilic secretory material. (b) Tumor cells are diffusely immunoreactive for S100 protein
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F3
The Ki67 proliferation index was low (6%) [Figure 3a and b].