Necrobiosis Lipoidica: A Rare Case of Transepithelial Elimination

The document reported a rare case of necrobiosis lipoidica, a skin condition, where there was transepithelial elimination of degenerated collagen and cholesterol crystals through hair follicles, manifesting as comedo-like plugs. This phenomenon is uncommon in necrobiosis lipoidica and is more typically associated with necrobiotic xanthogranuloma, indicating some overlap in the histopathologic findings of these conditions. The study suggested that additional criteria should be used to accurately diagnose necrobiosis lipoidica due to these overlapping features.