Lupus Panniculitis in Association with Anti-Phospholipid Antibody Syndrome on a Background of Systemic Lupus Erythematosus: A Case Report and Literature Review

Lupus panniculitis occurs in 1–3% of the patients diagnosed with systemic lupus erythematosus (SLE) and 10% of the patients diagnosed with discoid lupus erythematosus (DLE). It is a disorder of autoimmune origin, manifesting as deep erythematous plaques and nodules involving the trunk, breasts, buttocks, face, and proximal extremities. It does not commonly ulcerate. This report highlights the case of a 22-year-old Asian female with a history of coeliac disease and significant family history of antiphospholipid antibody syndrome (APS) who presented with fever, malaise, weight loss, and subcutaneous non-tender nodules over the forearm, back, bilateral thighs, and feet. Laboratory investigations revealed positive antinuclear antibodies, anti-Ro/SSA antibody, and lupus anticoagulant, resulting in a diagnosis of APS. Biopsies of lesions were consistent with findings of lupus panniculitis. Every case of SLE and DLE with discrete skin lesions should be reviewed for any distinct entity such as lupus panniculitis, as it may be associated with greater risk of flares and systemic involvement. The purpose of this case report is to emphasise that early diagnosis and prompt treatment is crucial to improving the prognosis of such patients.