Urology treats urinary tract diseases in all genders and male reproductive issues, covering the kidneys, bladder, prostate, urethra, from infections to complex cancers.
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To clearly define gallstone disease, also known as cholelithiasis, it is important to understand the biliary tree. This system is more than just a pathway for fluids; it is a complex network that manages the production, storage, and movement of bile. At Liv Hospital, we see the biliary system as a key part of the body’s metabolism, connecting the digestive functions of the intestines with the liver’s role in detoxification.
Stone formation starts at the cellular level in the liver, the body’s largest internal organ. The liver is made up of hexagonal units called lobules, where liver cells (hepatocytes) are arranged in rows separated by blood channels. These cells constantly produce bile, with the average adult liver making 500 to 1000 milliliters each day. This process relies on active transport pumps like the Bile Salt Export Pump (BSEP). Bile first moves into tiny channels called biliary canaliculi, which drain into the Canals of Hering. These then join to form interlobular bile ducts, which merge into larger ducts and eventually form the two main branches:
Many people think of the gallbladder as just a storage sac, but it is actually an active, muscular organ with important roles in absorbing and moving bile. It is pear-shaped and sits on the underside of the liver, between specific liver segments. The gallbladder has four main regions:
Although the gallbladder can only hold about 30 to 50 milliliters, it handles much more bile than that. Its lining is made of cells that absorb sodium and chloride, which pulls water out of the bile. This process concentrates the bile by 5 to 10 times in a few hours. While this makes bile more effective for digestion, it also increases the risk of gallstones. As water is removed, cholesterol and bile salts get closer together, and if the balance is off, stones can form.
Rokitansky-Aschoff Sinuses: A unique histological feature of the gallbladder is the presence of Rokitansky-Aschoff sinuses. These are deep invaginations of the mucosa into the muscular layer. In pathological states, bacteria and microstones can accumulate in these sinuses, contributing to chronic inflammation (chronic cholecystitis) and serving as a nidus for stone formation.
Bile is a complex, greenish-yellow, alkaline fluid with a pH ranging from 7.6 to 8.6. It is essential for the emulsification and absorption of dietary lipids (fats) and fat-soluble vitamins (A, D, E, and K). Its composition is a precise chemical mixture consisting of 95% water and 5% solutes.
Cholelithiasis means having hardened stones in the gallbladder. These stones form when the balance between the substances that keep bile dissolved (like bile salts and lecithin) and those that can form solids (like cholesterol and calcium) is disturbed.
Gallstones have different chemical makeups, and knowing what they are made of helps doctors understand why they form and how to treat them without surgery.
Cholesterol Stones. These are the predominant type, accounting for 75% to 80% of stones in Western populations and Turkey.
Pigment Stones: These stones contain less than 20% cholesterol and are composed primarily of calcium bilirubinate. They are subdivided into two clinical entities:
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Biliary sludge is a viscous suspension of microscopic precipitates, including cholesterol monohydrate crystals, calcium bilirubinate granules, and mucin gel. Clinically, it is considered a precursor to stones. While stones are complex macroscopic objects, sludge acts like “thick mud.” However, sludge is not harmless; it can still cause cystic duct obstruction (biliary colic), acute cholecystitis, and even pancreatitis, just as solid stones do.
No, polyps are fixed tissue growths arising from the gallbladder wall, typically cholesterol deposits (cholesterolosis) or true adenomas. Stones are free-floating calcifications. However, cholesterol polyps are part of the same metabolic spectrum as cholesterol stones. Large polyps greater than 10 millimeters carry a significant risk of malignancy (gallbladder cancer) and typically require cholecystectomy.
Yes, absolutely. The gallbladder is a storage and concentration organ, not a vital production organ. After cholecystectomy, the liver continues to produce bile, which drips continuously into the duodenum. Most patients digest food normally. The primary adaptation is the loss of the “bile surge” capacity, meaning very fatty meals might cause temporary indigestion or loose stools in a small percentage of patients.
The gender disparity is mainly hormonal. Estrogen increases the activity of the HMG-CoA reductase enzyme, causing the liver to synthesize and secrete more cholesterol into the bile. Simultaneously, progesterone reduces smooth muscle contractility, leading to gallbladder stasis. This dual effect makes biological females—particularly those who are pregnant, multiparous, or using oral contraceptives—significantly more prone to stone formation.
Yes, there is a strong genetic component to cholelithiasis. Research has identified “Lithogenic genes” (LITH genes), such as the ABCG5 and ABCG8 transporters, which regulate the excretion of cholesterol into bile. If your parents or siblings had gallstones, your relative risk is significantly elevated compared to the general population.
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