An apple-shaped fat distribution is associated with an adverse cardiometabolic phenotype. Hypercortisolaemia (Cushing's syndrome) is characterised by abdominal fat accumulation and gluteofemoral fat loss. The mechanisms underpinning this redistribution of fat mass are unknown. Since adipose tissue blood flow (ATBF) is an important determinant of lipolytic rate in vivo, we hypothesised that hypercortisolaemia might lead to differential abdominal and femoral ATBF.