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. 2007 Aug 20;8(4):356–359. doi: 10.3348/kjr.2007.8.4.356

Fig. 1.

Fig. 1

A 50-year-old woman with a palpable left subareolar mass.

A. Sonography shows a heterogeneoulsy hypoechoic mass with an indistinct margin.

B. Photomicrograph shows that the lesion is lined by epidermal-type epithelium and it is filled with keratinous material, which is pathognomonic for an epidermal inclusion cyst. (Hematoxylin & Eosin staining × 40)

C. Photomicrograph of adjacent tissue (box in B) reveals inflammatory infiltrate cells or a foreign body reaction. (Hematoxylin & Eosin staining × 100)