Cold panniculitis: delayed onset in an adult.

The panniculitides are a complex dermatologic entity for both dermatologists and dermatopathologists. Panniculitis is an inflammation of the subcutaneous adipose tissue and can be associated with systemic diseases. We present a case of cold panniculitis, a form of traumatic panniculitis, in a 37-year-old woman that was caused by a cold therapy unit. Our patient did not develop lesions until 10 days following initiation of therapy, which is a unique presentation of cold panniculitis, as lesions usually develop 1 to 3 days after cold exposure.