The nutcracker syndrome is compression of a renal vein leading to back pressure inside the kidney that presents with pain and hematuria. This can be very similar and in fact may be identical to many presentations of the so-called loin pain haematuria syndrome which is just as it sounds - a syndrome where patient experience pain accompanied by haematuria that is not explained by other known pathology. However, in general, both of these entities are largely a diagnosis of exclusion. In particular, loin pain haematuria syndrome, if not due to a nutcracker phenomenon, is often diagnosed clinically rather than by any diagnostic testing. In some cases, magnetic resonance and geography can be helpful.
Please see the attached case report and let me know if this reflects your experience in terms of symptoms:
Dr. Jordan Weinstein