question: Hello,Since being diagnosed with Hypogammaglobulemia @ 53 yo , I'm trying to figure out the cause: Chronic pylonephritis resulting in nephrectomy 20yrs agoFocal segmental glomersclerosis in remaining kidneyAnkylosing Spondylitis + (spinal stenosis)FibromyalgiaOsteo-Arthritis (hands, feet, knees, etc...)Any ideas?