RT Book, Section A1 Doherty, Gerard M. SR Print(0) ID 58107387 T1 Cholelithiasis T2 Quick Answers Surgery YR 2010 FD 2010 PB The McGraw-Hill Companies PP New York, NY SN LK accesssurgery.mhmedical.com/content.aspx?aid=58107387 RD 2024/10/03 AB • Divided into symptomatic and asymptomatic• Caused by cholesterol (most common), black pigment, or brown pigment stones• Cholesterol stones form in 20% of women and 10% of men by age 60• Cholesterol stone risk factors include:-Female gender-Age-Obesity-Estrogen exposure-Fatty diet-Rapid weight loss• Black pigment stone risk factors include:-Hemolytic disorders-Living in Asia• Brown pigment stone risk factors include:-Biliary stasis-Biliary infections