The document discusses kidney stones, which are hard masses formed in the kidney from insoluble calcium compounds. Risk factors include being overweight, having insulin resistance, low estrogen levels, high protein diets, and digestive or surgery issues. Kidney stones most commonly affect adults aged 30-50 and are more prevalent in men than women. Approximately 1 in 10 Canadians will experience kidney stones, which is 12% of men and 7% of women. Treatment options include medical therapy, using sound waves to break up stones, or surgery to remove stones, while smaller stones may be treated using a ureteroscope.