Retroperitoneal fibrosis,
known as M. Ormond, according current knowledge, is also associated with IgG4 related diseases.
IgG4 related disease is also a possible cause of a non-infectious aortitis or non-infectious abdominal aortic aneurysma.
Symptoms:
fever, night sweat, severe fatigue, lower resilience of one arm or leg,
abdominal, back and flank pain