BTG3 and systemic lupus erythematosus: Patient #4 was a 44-year-old woman, phototype II, with a nine-year history of SLE with previous renal, haematological, and musculoskeletal involvement along with positive ANA, ADNA, anti-phospholipid antibodies and low complement, but recently dominated by mucocutaneous manifestations, encompassing alopecia, chilblain lupus, digital vasculitis, Raynaud’s phenomenon, oral ulcers and photosensitivity.