Gallstones

Gallstones, also known as cholelithiasis or biliary calculus, are hardened deposits of digestive fluid that form in your gallbladder. The gallbladder is a small, pear-shaped organ located just beneath your liver that stores and concentrates bile, a digestive fluid produced by your liver. When you eat, especially fatty foods, the gallbladder releases bile into your small intestine to aid digestion. Gallstones can vary in size and number. There are primarily two types: Cholesterol Stones: These are the most common type, making up about 80% of gallstones. They are primarily composed of undissolved cholesterol and often appear yellow-green. Pigment Stones: These are smaller, darker stones made of bilirubin, a waste product from red blood cell breakdown. They form when there is too much bilirubin in the bile that cannot be dissolved. Pigment stones are often associated with conditions like cirrhosis, certain blood disorders (such as sickle cell anemia), and biliary tract infections. Gallstone formation is a complex process involving the composition of bile and how well your gallbladder moves. For cholesterol stones, three main factors contribute: your liver producing bile with too much cholesterol, cholesterol crystals forming, and your gallbladder not emptying properly, allowing these crystals to grow into stones. Pigment stones form due to excess unconjugated bilirubin, often linked to chronic blood disorders or infections in the bile ducts.

Symptoms

No symptoms (asymptomatic) in most cases
Intense, dull pain in the upper right abdomen or center of the abdomen (biliary colic)
Pain that may radiate to the back or right shoulder blade
Sudden onset of pain, often after a fatty meal
Pain lasting 30 minutes to 6 hours, constant rather than fluctuating
Nausea
Vomiting
Sweating (diaphoresis)
Vague abdominal discomfort
Bloating
Belching
Indigestion (dyspepsia)
Severe, constant pain lasting more than 6 hours (emergency symptom)
Fever, chills, or rigors (shaking) (emergency symptom)
Yellowing of the skin and eyes (jaundice) (emergency symptom)
Dark-colored urine (emergency symptom)
Pale or clay-colored stools (emergency symptom)
Rapid heart rate (tachycardia) (emergency symptom)
Low blood pressure (hypotension) (emergency symptom)

Causes & Risk Factors

Bile supersaturation: The liver secretes bile with too much cholesterol, exceeding the capacity of bile salts and phospholipids to keep it dissolved.
Crystal nucleation: Cholesterol monohydrate crystals precipitate from the supersaturated bile, a process that can be sped up by certain factors like mucin glycoproteins.
Gallbladder hypomotility: Impaired emptying of the gallbladder allows time for crystals to aggregate and grow into stones.
Increased concentrations of unconjugated bilirubin, often due to chronic hemolysis (e.g., sickle cell disease) or cirrhosis, leading to black pigment stones.
Bacterial or parasitic infections and bile duct stasis, leading to brown pigment stones, typically in the bile ducts.
Female sex (due to estrogen increasing cholesterol in bile and progesterone reducing gallbladder motility)
Increasing age, especially over 40
Native American and Hispanic ethnicity
Family history of gallstones
Long-term total parenteral nutrition (TPN)
Obesity (BMI > 30 kg/m²)
Rapid weight loss (e.g., from very-low-calorie diets or bariatric surgery)
Pregnancy and having multiple pregnancies (due to hormonal changes)
Estrogen-containing medications (e.g., oral contraceptives, hormone replacement therapy)
Certain medications like ceftriaxone and octreotide
Metabolic syndrome and diabetes mellitus
Gastrointestinal conditions such as Crohn's disease, ileal resection, and cystic fibrosis
Liver cirrhosis
Sedentary lifestyle (possible risk factor)
High-fat, high-cholesterol, low-fiber diet (possible risk factor)

Diagnosis

Review of symptoms, especially characteristics of abdominal pain
Assessment of risk factors (e.g., age, sex, obesity, family history)
Physical examination, including checking for tenderness in the upper right abdomen
Murphy's Sign (inspiratory arrest upon deep palpation of the upper right abdomen, suggesting acute cholecystitis)
Assessment for jaundice, fever, or other signs of complications
Complete Blood Count (CBC) to check for signs of infection or inflammation (e.g., leukocytosis)
Liver Function Tests (LFTs) to check for elevated alkaline phosphatase (ALP), gamma-glutamyl transferase (GGT), and bilirubin, which may suggest bile duct obstruction
Amylase and Lipase tests to check for elevated levels, suggesting gallstone pancreatitis
Transabdominal Ultrasound (first-line imaging test, highly sensitive for detecting gallstones and complications)
Hepatobiliary Iminodiacetic Acid (HIDA) Scan (Cholescintigraphy) to diagnose acute cholecystitis when ultrasound is inconclusive
Magnetic Resonance Cholangiopancreatography (MRCP) to visualize bile and pancreatic ducts, excellent for detecting common bile duct stones
Endoscopic Ultrasound (EUS) for detecting small stones, especially in obese patients
Computed Tomography (CT) Scan for evaluating complications like pancreatitis or abscesses (less sensitive for gallstones themselves)
Endoscopic Retrograde Cholangiopancreatography (ERCP) for both diagnosing and removing stones from the common bile duct (reserved for high suspicion of common bile duct stones due to its invasive nature)

Treatment Options

Watchful waiting for asymptomatic gallstones found incidentally, as most do not cause problems
Laparoscopic Cholecystectomy (minimally invasive surgery to remove the gallbladder), considered the gold standard for symptomatic gallstones
Open Cholecystectomy (traditional surgery to remove the gallbladder), reserved for cases where laparoscopic surgery is not possible or becomes complicated
Oral Dissolution Therapy with ursodeoxycholic acid (UDCA) for small, non-calcified cholesterol gallstones in patients who are not good candidates for surgery (limited efficacy, long treatment, high recurrence)
Extracorporeal Shock Wave Lithotripsy (ESWL) to fragment stones (rarely used due to limited efficacy and availability)
Hospital admission, intravenous fluids, pain relief, and intravenous antibiotics for acute cholecystitis
Early laparoscopic cholecystectomy (within 72 hours of symptom onset) for acute cholecystitis
Urgent biliary drainage, typically via ERCP with stone extraction, followed by antibiotics for choledocholithiasis or cholangitis
Supportive care (IV fluids, pain control) for gallstone pancreatitis, with ERCP if cholangitis or persistent obstruction is present
Cholecystectomy recommended before discharge for gallstone pancreatitis to prevent recurrence
Referral to a general surgeon for evaluation for gallbladder removal in all patients with symptomatic gallstones
Immediate emergency department referral for patients with severe symptoms suggesting complications

Frequently Asked Questions

Do all gallstones need to be removed?

No, not all gallstones need to be removed. The majority of individuals with gallstones (up to 80%) have no symptoms. If your gallstones are not causing any symptoms, they are often managed with watchful waiting, as the risks of prophylactic surgery generally outweigh the benefits.

What is the difference between having gallstones and having a gallbladder attack?

Having gallstones simply means that you have hardened deposits in your gallbladder. A 'gallbladder attack,' medically known as biliary colic, refers to the intense, dull pain and other symptoms that occur when a gallstone temporarily blocks a bile duct. Most people with gallstones never experience an attack.

Can I pass a gallstone on my own?

While very small gallstones might sometimes pass, larger stones can cause significant pain and lead to serious complications if they block bile ducts or move into other areas like the bowel. If you experience symptoms of gallstones, it's important to seek medical attention rather than attempting to pass them on your own.

What are the risks and benefits of gallbladder surgery?

The main benefit of gallbladder surgery (cholecystectomy) for symptomatic gallstones is a definitive cure, relieving pain and preventing future attacks and complications. Risks include general surgical risks, and in a small percentage of patients, persistent or new symptoms after surgery, known as post-cholecystectomy syndrome.

What is recovery like after a laparoscopic cholecystectomy?

Laparoscopic cholecystectomy is a minimally invasive procedure. It typically involves low morbidity (fewer complications) and a short hospital stay. Recovery is generally quicker compared to traditional open surgery.

Can gallstones come back after the gallbladder is removed?

No, gallstones cannot recur in the gallbladder once it has been removed. However, in rare cases, stones can form in the bile ducts themselves (primary choledocholithiasis) or be retained in the bile ducts after surgery (retained choledocholithiasis).

What kind of diet should I follow if I have gallstones?

To help prevent gallstones or manage symptoms, a diet high in fiber, fruits, vegetables, and healthy fats (like those found in nuts) is recommended. It's also advisable to limit refined carbohydrates and saturated fats. If you experience symptoms, especially after fatty meals, your doctor may recommend avoiding high-fat foods.

Are there effective non-surgical treatments for gallstones?

Oral dissolution therapy using ursodeoxycholic acid (UDCA) can dissolve small (<15 mm), non-calcified, cholesterol-rich gallstones, but it requires a functioning gallbladder. Its efficacy is limited, treatment can take months to years, and recurrence rates are high (over 50%) after stopping treatment. It's generally reserved for patients who are not good candidates for surgery. Extracorporeal Shock Wave Lithotripsy (ESWL) is rarely used today.

How are gallstones diagnosed?

Gallstones are typically diagnosed through a combination of your medical history, a physical examination, and imaging tests. A transabdominal ultrasound is the primary diagnostic tool, as it is highly effective at detecting gallstones. Blood tests may also be used to check for complications.

Why does pregnancy increase the risk of gallstones?

Hormonal changes during pregnancy increase the risk of gallstone formation. Estrogen increases the amount of cholesterol secreted into bile, and progesterone can reduce the gallbladder's ability to contract and empty effectively, leading to bile stasis.

Is it safe to have gallbladder surgery during pregnancy?

Yes, if surgery is required for symptomatic gallstones or complications during pregnancy, laparoscopic cholecystectomy is considered safe. The second trimester is generally considered the optimal time for such surgery.

What is a HIDA scan and why might I need one?

A HIDA scan (hepatobiliary iminodiacetic acid scan) is an imaging test used to diagnose acute cholecystitis (inflammation of the gallbladder) when an ultrasound is inconclusive. It involves injecting a radioactive tracer that travels to your liver, bile ducts, and gallbladder. If the gallbladder doesn't visualize, it indicates a blockage of the cystic duct, often by a gallstone.

What is an ERCP and is it a type of surgery?

ERCP (Endoscopic Retrograde Cholangiopancreatography) is a procedure that is both diagnostic and therapeutic. It uses an endoscope (a thin, flexible tube with a camera) passed through your mouth into your digestive tract to visualize the bile and pancreatic ducts. It can also be used to remove stones from the common bile duct. While it is an invasive procedure, it is not considered traditional open surgery.

What is post-cholecystectomy syndrome?

Post-cholecystectomy syndrome refers to the persistent or new symptoms that some patients (5-15%) may experience after their gallbladder has been removed. These symptoms are often due to other gastrointestinal conditions like irritable bowel syndrome (IBS) or gastroesophageal reflux disease (GERD), or less commonly, issues like retained stones in the bile ducts.

Can my medications cause gallstones?

Yes, certain medications can increase your risk of developing gallstones. These include estrogen-containing medications (such as oral contraceptives and hormone replacement therapy), as well as some antibiotics like ceftriaxone, and the medication octreotide.

Is there a link between gallstones and gallbladder cancer?

Yes, there is a link. The presence of gallstones is considered the single biggest risk factor for gallbladder cancer. However, it's important to remember that gallbladder cancer is a rare but aggressive malignancy.

What are the symptoms of a gallstone blocking a bile duct?

If a gallstone blocks a bile duct, it can lead to serious complications. Symptoms may include severe, constant pain lasting more than 6 hours, fever, chills, yellowing of the skin and eyes (jaundice), dark-colored urine, and pale or clay-colored stools. These are emergency symptoms requiring immediate medical attention.

Why is the pain worse after eating fatty foods?

Eating fatty foods triggers your gallbladder to contract and release bile to help with digestion. If gallstones are present, this contraction can cause a stone to block the bile duct, leading to the characteristic pain of a gallbladder attack (biliary colic).

What is the difference between cholesterol stones and pigment stones?

Cholesterol stones are the most common type, primarily made of undissolved cholesterol, and often appear yellow-green. Pigment stones are smaller, darker, and made of bilirubin. They are associated with conditions that cause excess bilirubin, such as chronic blood disorders or infections.

How long does a typical gallbladder attack last?

A typical gallbladder attack, or biliary colic, usually lasts between 30 minutes and 6 hours. The pain is constant during this period, rather than coming and going in waves.

What happens if I choose not to have surgery for my symptomatic gallstones?

If you have symptomatic gallstones and choose not to have surgery, your symptoms (like biliary colic) are likely to continue. There is also a risk of developing serious complications over time, such as acute cholecystitis (gallbladder inflammation), choledocholithiasis (stones in the common bile duct), or pancreatitis. While medical dissolution therapy is an option for some, its effectiveness is limited, and recurrence is high.