The etiology of panniculitis can be diverse, ranging from infections and trauma to autoimmune diseases and malignancies. Common infectious causes include bacterial, fungal, and mycobacterial infections. Autoimmune diseases such as lupus erythematosus and rheumatoid arthritis can also lead to panniculitis. Additionally, panniculitis can be associated with systemic diseases like sarcoidosis and specific conditions such as Weber-Christian disease.
