Lupus erythematosus paniculitis

Lupus erythematosus panniculitis is a rare type of chronic cutaneous lupus erythematosus which is histopathologically characterized by a lobular panniculitis. We present a 43-year-old woman with an indurated painful plaque on her right flank from 3 years ago. She mentioned a previous blunt trauma to this site. Microscopic examination revealed a predominant lobular panniculitis with lymphoid follicle formation, hyaline fat necrosis, membranocystic changes and mucin deposition. She was treated with oral hydroxychloroquine with moderate improvement. An indurated subcutaneous painful plaque could be the presenting feature of lupus panniculitis and we should evaluate systemic involvement in these patients.