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A 25-year-old man presented with a tiny lesion on the suprasternal notch which occasionally discharged a clear fluid. The lesion was faint brown and measured 3 mm in maximum dimension and was not inflamed. Clinically, this was suspected to be a cyst.
Microscopic examination showed an unremarkable epidermis and the dermis contained a cystic space lined by bland pseudostratified respiratory type epithelium and adjacent seromucinous glands (fig 1).