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A kidney stone is a hard, pebble-like deposit that forms in 1 or both kidneys. It may be as small as a grain of sand or as large as a pearl. Some are as big as golf balls. A stone may be smooth, irregular in shape, or jagged. Most are yellow or brown in color. There are different types of kidney stones.

Detailed information on kidney transplantation.

Glomerulosclerosis is scarring in the tiny blood vessels in the kidneys called the glomeruli. These are the tiny units in the kidneys that filter urine from the blood.

Goodpasture syndrome is a rare autoimmune disease that affects the lungs and kidneys. Normally, the immune system makes antibodies to fight off germs. With Goodpasture syndrome, however, the immune system mistakenly makes antibodies that attack the lungs and kidneys. This condition can quickly progress to glomerulonephritis and kidney failure.

IgA nephropathy is a chronic kidney disease. It progresses over 10 to 20 years, and can lead to end-stage renal disease. Read on to learn about causes, symptoms, diagnosis, and treatment.

Nephrotic syndrome causes scarring or damage to the filtering part of the kidneys (glomeruli). This causes too much protein to be lost from the blood into the urine.

Renal vascular disease affects the blood flow into and out of the kidneys. It may cause kidney damage, kidney failure, and high blood pressure.

Detailed information on keratosis pilaris, including symptoms, diagnosis, and treatment.

A headache is pain or discomfort in one or more areas of the head or face. Headaches can happen once in a while. Or they may happen often.