Presentation
Mid-back painless swelling for 6 months
Patient Data
At the region of interest, a well-defined oval-shaped mildly heterogeneous echogenicity lesion within the superficial subcutaneous soft tissues measuring about 2.0 x 1.1 cm. No calcifications are seen in it. No significant interval vascularity is seen on color Doppler examination.
The lesion likely represents an epidermal inclusion cyst/sebaceous cyst.
Case Discussion
Epidermal inclusion cysts or epidermal cysts are common cutaneous lesions that represent proliferation of squamous epithelium within a confined space in the dermis or subdermis.
Epidermal cysts are either found incidentally or present as a firm non-tender lump. If they rupture, a local inflammatory response to the necrotic debris released can mimic infection.
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