Nephrotic range proteinuria in a renal transplant associated with oncocytoma of the native kidney

In summary, this report suggests that nephrotic range proteinuria may be associated with a unique renal tumour and that MGN was the likely causative renal lesion. Further studies are required to determine whether specific oncocytoma antigens and antibodies can be identified in MGN lesions and it is important that all cases are reported to determine if this association can be confirmed by others.