The panniculitides are a group of heterogeneous inflammatory diseases involving the subcutaneous fat. Traditionally, the clinical and the histopathological study of the panniculitides have been considered one of the most difficult subjects in dermatology. The reasons for this relative unpopularity of the panniculitides are varied. First, the lesions show
a disappointing clinical monotony.
The panniculitides represent a group of heterogeneous inflammatory diseases that involve the subcutaneous fat. The specific diagnosis of these diseases requires histopathologic study because different panniculitides usually show the same clinical appearance, which consists of erythematous nodules on the lower extremities.