Polka Dot Pattern

Dermatology A term referring to the multiple, small, circular patches involving a few hair shafts, seen in early scalp involvement by the superficial dermatophytic fungus Trichophyton tonsurans, an endothrix-type agent
Imaging Polka dot sign A term of art referring to the patchy areas of thickened trabeculae occasionally seen on end on CT images of vertebral body hemangiomas