AKT-3594

AKT-3594

A 48-year-old woman who has had systemic lupus erythematosus (SLE) for a number of years complains of facial swelling, which she thinks might be due to a food allergy. On examination, she has facial oedema, raised blood pressure at 170/100 mmHg and although she can only produce a small amount of urine, dipstick testing is strongly positive for blood and protein.
Select the single most likely diagnosis.