Chronic calculous cholecystitis: course and therapy

Chronic calculous cholecystitis is a long-term inflammation of the gallbladder associated with gallstones, where stones and repeated episodes of gallbladder wall irritation gradually lead to thickening, scarring, and impaired contractions. Over time, the gallbladder becomes less able to empty, bile stagnates, and bouts of pain after eating can recur for years. [1]

It's important to understand the difference between "the stones are there" and "the stones cause disease." Many people with gallstones have no symptoms, but when typical biliary colic or complications develop, the situation changes: this is when the inflammation becomes clinically significant and often requires active treatment. [2]

Chronic progression typically develops after repeated bouts of pain, sometimes after acute inflammation, and sometimes gradually, when gallstones irritate the bladder wall over months or years. Because of this, symptoms can be vague and resemble other gastrointestinal diseases, often resulting in a delay in diagnosis. [3]

The modern approach is built around 3 goals: to confirm that it is the gallbladder and stones that explain the complaints, to exclude dangerous complications, and then to choose the safest and most effective tactic, most often surgical in the case of symptomatic progression. [4]

Code according to ICD-10 and ICD-11

In the International Classification of Diseases, 10th revision, chronic cholecystitis is coded as K81.1, while cholelithiasis is coded under K80 (with clarifications on the location of stones and the presence of inflammation). For the "calculous" variant, codes from the K80 group are often used in practice, where cases involving cholecystitis are separately identified. [5]

In the International Classification of Diseases, 11th revision, chronic cholecystitis is classified as a separate code, DC12.1. For the combination of gallstones and "other cholecystitis" (which includes the chronic variant), the code DC11.1 is used, which is convenient for reflecting the calculous nature of the process. [6]

Below is a practical coding table that is generally sufficient for documentation and data exchange between specialists. In actual reporting, refinements are possible, because the International Classification of Diseases, 11th revision, makes extensive use of "post-coordination" (adding clarifying codes to the main diagnosis), but the basic codes remain the reference ones. [7]

Table 1. International Classification of Diseases codes of the 10th and 11th revisions for chronic calculous cholecystitis

System	State	Code
International Classification of Diseases, 10th revision	Chronic cholecystitis	K81.1
International Classification of Diseases, 10th revision	Gallstone disease (class)	K80
International Classification of Diseases, 10th revision	Gallstones with "other cholecystitis" (including chronic)	K80.1
International Classification of Diseases, 11th revision	Chronic cholecystitis	DC12.1
International Classification of Diseases, 11th revision	Gallbladder or cystic duct stones with "other cholecystitis" (including chronic)	DC11.1

[8]

Epidemiology

Gallstones are very common and underlie most cases of chronic calculous cholecystitis. In the United States, gallstones occur in approximately 10-15% of the population, and a significant proportion of those diagnosed eventually require treatment, most often surgically. [9]

Globally, the prevalence of stones varies significantly between regions. A large systematic review and meta-analysis estimated the overall global prevalence in the general population to be approximately 5.86%, with significant geographic variations.[10]

In countries with a "Western" diet, gallstones are common in 10-20% of the adult population, and most carriers remain asymptomatic for long periods. The risk of developing symptoms is estimated at approximately 1-4% per year, and after the first typical attack of biliary colic, the risk of complications increases. [11]

Chronic calculous cholecystitis most often develops in people with symptomatic gallstone disease, when pain is recurring and the gallbladder wall gradually becomes fibrotic. Therefore, calculating the exact prevalence of chronic calculous cholecystitis separately from gallstone disease is more difficult: statistics more often record stones and complications, while chronic inflammation is confirmed by a combination of clinical, ultrasound, and intraoperative findings. [12]

Reasons

The main cause of chronic calculous cholecystitis is prolonged mechanical and chemical irritation of the gallbladder wall by stones and "thick" bile, which causes inflammation even without an active bacterial infection. Repeated microtrauma to the mucosa, periodic blockages of the cystic duct, and impaired motility create the conditions for a chronic process. [13]

Stones themselves often form due to disturbances in bile composition: cholesterol overload, changes in bile acids and phospholipids, and bile stagnation. When the gallbladder contracts less effectively, crystals more easily "stick" together and grow, and inflammation becomes more likely. [14]

An important detail: bacteria can play a role in acute exacerbations and complications, but chronic calculous cholecystitis is not always an infectious disease. Therefore, "lifelong antibiotics" or long courses of antibacterial drugs are not considered basic treatment for a chronic condition without signs of infection. [15]

Sometimes, the chronic process is perpetuated by a "vicious cycle": stones impair bladder emptying, congestion increases inflammation, the inflamed wall contracts even less effectively, and this accelerates the progression of symptoms. This mechanism explains why, in some people, attacks gradually become more frequent and severe. [16]

Risk factors

The risk factors for chronic calculous cholecystitis are largely the same as those for gallstones, as stones are the key "fuel" of the process. The most significant are excess weight and obesity: these conditions often increase the cholesterol content of bile, and the gallbladder may function less efficiently. [17]

A significant risk factor is rapid weight loss, especially on very low-calorie diets or after bariatric surgery. With rapid weight loss, the liver secretes more cholesterol into bile, and the gallbladder empties less efficiently, which increases the risk of stone formation and subsequent symptoms. [18]

The risk increases with age and is more common in women, especially those with a history of pregnancy and a family history. In practice, this means that if someone at risk experiences typical pain after eating fatty foods, the likelihood of a biliary cause is higher, and examination should begin with the gallbladder and bile ducts. [19]

Additional factors include diabetes, certain bowel diseases, and the use of certain medications that alter bile composition. For clinical purposes, it is useful to consider these as "amplifiers" of stone risk and symptoms, rather than as the sole cause. [20]

Table 2. Risk factors and practical interpretation

Factor	Why does it increase the risk?	What can be done
Obesity	more cholesterol in bile, worse gallbladder motility	gradual weight loss
Fast weight loss	bile stasis, increased cholesterol in bile	Lose weight more slowly and discuss prevention with your doctor.
Female gender, age	hormonal and age-related changes in bile composition and motility	early diagnosis with symptoms
Family history	inherited metabolic features	attention to symptoms, ultrasound screening as indicated
Diabetes mellitus	lipid metabolism and motility disorders	glycemic control, nutrition, physical activity

[21]

Pathogenesis

Pathogenesis begins with the formation of stones, most often cholesterol stones, when bile becomes oversaturated with cholesterol, and bile acids and phospholipids are less able to retain it in solution. Crystals then form, which, under stagnant conditions, gradually enlarge and transform into stones. [22]

When a stone temporarily blocks the cystic duct, the gallbladder attempts to contract, resulting in a painful episode, and the wall experiences ischemia and stretching. Repeated episodes of this kind trigger chronic inflammation, wall infiltration, and fibrosis, causing the gallbladder to lose elasticity and contract even more poorly. [23]

Long-term inflammation alters the bile lining and composition: viscosity increases, and biliary sludge (thick sediment) appears more frequently, further promoting stone formation. Against this background, even small stones can cause symptoms if they are mobile and easily become lodged in the bladder neck. [24]

In complications, the pathogenesis extends beyond the gallbladder: the stone can migrate into the common bile duct and cause obstructive jaundice, bile duct inflammation, and acute pancreatitis. Therefore, if jaundice, high fever, or persistent pain occur, the chronic process should be considered potentially complicated until proven otherwise. [25]

Symptoms

The classic symptom is biliary colic: sudden, intense pain in the right hypochondrium or upper abdomen, often after eating fatty foods, which can radiate to the back or under the right shoulder blade. The pain is often accompanied by nausea, sometimes vomiting, and can last from tens of minutes to several hours. [26]

With chronic calculous cholecystitis, pain can be not only paroxysmal but also "nagging," accompanied by a feeling of heaviness after eating, bloating, and early satiety. Because of this, the condition sometimes masquerades as functional dyspepsia or gastritis, especially if the person doesn't associate the symptoms with specific foods. [27]

Between flare-ups, long periods of relative well-being are possible, but after another nutritional error, attacks recur. A gradual increase in the frequency of attacks and increased pain usually reflects the progression of inflammation and deterioration of bladder motility. [28]

If high fever, severe weakness, increasing pain upon inhalation and palpation, jaundice, or dark urine develop, this is no longer a "normal" chronic condition. These symptoms suggest acute inflammation, a stone in the common bile duct, bile duct inflammation, or pancreatitis and require urgent evaluation. [29]

Table 3. Symptoms and warning signs

Manifestation	What is more likely?	What to do
An attack of pain after eating, without fever	biliary colic, symptomatic stones	routine diagnostics, treatment discussion
Constant pain and fever	acute inflammation of the gallbladder	urgently see a doctor, sometimes hospitalization
Jaundice, dark urine	stone in the common bile duct	See a doctor immediately, have your ducts assessed
Pain plus repeated vomiting	complication, pancreatitis is possible	see a doctor urgently
Weakness, drop in blood pressure, confusion	severe infection or complication	call emergency services immediately

[30]

Classification, forms and stages

Based on the presence of stones, chronic cholecystitis is classified as calculous and noncalculous. This topic focuses on the calculous form, which is more common and directly related to gallstone disease. [31]

Based on the clinical course, a distinction is made between a latent form (minimal complaints, rare episodes of discomfort), a painful form (typical colic predominates), and a dyspeptic form (bloating, nausea, heaviness after eating). This division helps explain why the same "cause" presents differently in different people. [32]

The course of the disease is often described in phases as remission and exacerbation. During remission, symptoms are minimal, but ultrasound signs of stones and chronic changes in the wall may persist, while during exacerbation, colic and inflammatory manifestations more often occur. [33]

In clinical practice, complications are assessed separately: stones in the common bile duct, bile duct inflammation, acute pancreatitis, and gallbladder empyema. These are not "stages" of chronic cholecystitis, but they determine the urgency and extent of treatment. [34]

Complications and consequences

The most common complication is the development of acute gallbladder inflammation, when the pain becomes constant, fever, and severe soreness develop. This condition is no longer considered a "quiet" chronic condition and requires prompt medical attention. [35]

A dangerous complication is associated with stone migration into the common bile duct. This can lead to mechanical jaundice, bile duct inflammation, and acute pancreatitis, which can sometimes develop rapidly and severely. [36]

Long-term chronic inflammation can lead to severe fibrosis, gallbladder deformation, fistula formation, and, in rare cases, to a so-called "porcelain" gallbladder (wall calcification), which is associated with an increased risk of cancer. These situations are considered an argument in favor of surgical treatment, even in cases of mild symptoms. [37]

Consequences on quality of life include recurring pain attacks, fear of food, dietary restrictions, and frequent emergency room visits. Symptom burden often becomes the primary indication for planned treatment, as the prognosis with appropriate therapy is usually favorable. [38]

When to see a doctor

You should consult a doctor at the first episode of typical pain in the right hypochondrium or upper abdomen, especially if the pain recurs after eating fatty foods. Early diagnosis helps differentiate biliary colic from stomach, pancreatic, and heart diseases and determine the appropriate treatment. [39]

Urgent treatment is necessary if the pain lasts longer than 30 minutes and does not subside, worsens, or is accompanied by nausea and vomiting that do not provide relief. This may be a sign of a complication that requires investigation within the next few hours. [40]

Immediate medical attention is needed if pain is accompanied by fever, chills, jaundice, severe weakness, or confusion. Such combinations are typical of complicated biliary pathology and may require hospitalization. [41]

Even with a confirmed diagnosis of chronic calculous cholecystitis, the appearance of new symptoms or a change in the usual pattern of pain is a reason for an unscheduled examination. A chronic condition should not be used as an explanation for any new abdominal pain without further investigation. [42]

Diagnostics

Diagnosis begins with a discussion of symptoms: where the pain is, how long the attack lasts, whether there is a connection with fatty foods, and whether there have been episodes of jaundice, fever, or dark urine. An examination is then performed, including an assessment of pain in the right hypochondrium and signs of complications. [43]

Next, blood tests are performed to answer two key questions: whether there is inflammation and whether there are signs of bile duct blockage. Typically, a complete blood count, inflammation markers, liver enzymes, bilirubin, and pancreatic enzymes are assessed if pancreatitis is suspected. [44]

The primary imaging method is abdominal ultrasound. It is effective in detecting gallstones, wall thickening, signs of bile stasis, and sometimes dilation of the bile ducts, which may suggest a common bile duct stone. [45]

If a common bile duct stone is suspected or ultrasound data are insufficient, clarification methods are used: magnetic resonance cholangiopancreatography or endoscopic ultrasound. Computed tomography is more often used to search for complications and alternative diagnoses, and hepatobiliary scintigraphy can be useful in certain situations for functional assessment. Oral cholecystography is used significantly less frequently in modern practice due to the availability of more accurate methods. [46]

Table 4. Step-by-step diagnostics and the meaning of each step

Step	Method	What does it give in practice?
1	Symptom assessment and examination	the likelihood of a biliary cause and signs of complications
2	Blood tests	inflammation, cholestasis, pancreatic involvement
3	Ultrasound examination	stones, bladder wall, congestion, dilation of ducts
4	Magnetic resonance cholangiopancreatography	clarification of the condition of the bile ducts and stones in them
5	Endoscopic ultrasound examination	high accuracy in cases of suspected duct stones
6	Endoscopic treatment when duct stones are confirmed	removal of stones and restoration of bile flow

[47]

Differential diagnosis

Chronic calculous cholecystitis often must be distinguished from conditions that cause similar pain after eating: gastric and duodenal ulcers, gastroesophageal reflux disease, and functional dyspepsia. Here, the precise localization of pain, typical "colicky" attacks, and ultrasound findings are particularly important. [48]

The second major group is pancreatic diseases. Acute pancreatitis can begin with upper abdominal pain and vomiting, and gallstones are one of the causes of pancreatitis, so sometimes the two conditions overlap. Pancreatic enzyme tests and bile duct evaluation help prevent this dangerous scenario from being missed. [49]

It's also important to rule out renal colic, right-sided lower lobe pneumonia, appendicitis in an atypical location, and, in older adults, coronary artery disease, which sometimes "masks" as upper abdominal pain. Therefore, if the diagnosis is questionable, the physician evaluates not only the gallbladder but also general risks and alternative sources of pain. [50]

Differential diagnosis is always strengthened by signs of cholestasis and jaundice: in this case, it is important to distinguish a common bile duct stone from tumor obstruction, strictures, and inflammatory diseases of the bile ducts. Bilirubin levels, liver enzymes, and detailed visualization of the bile ducts play a crucial role here. [51]

Table 5. Frequent "doubles" and distinctive features

State	What is similar	What makes it different
Peptic ulcer disease	pain after eating	connection with acidity, endoscopic signs
Gastroesophageal reflux disease	discomfort in the upper abdomen	heartburn, regurgitation, effect of antisecretory therapy
Acute pancreatitis	severe pain and vomiting	elevated pancreatic enzymes, typical imaging pattern
Renal colic	sharp pain on the right	irradiation to the groin, changes in urine, visualization of the urinary tract
Common bile duct stone	pain and jaundice	severe cholestasis, dilation of the ducts, confirmed by specialized imaging

[52]

Treatment

For chronic calculous cholecystitis, treatment is selected based on the presence of symptoms and complications. For asymptomatic stones, observation is often the preferred treatment, as the risk of complications is low for many people, while surgery carries its own risks. For recurrent biliary colic, the strategy usually shifts toward active treatment. [53]

During a pain attack, the primary treatment is pain relief and spasm control. In practice, nonsteroidal anti-inflammatory drugs and antispasmodics are used as prescribed by a doctor, and antiemetics are added in cases of severe nausea. The goal of symptomatic therapy is to help you survive the episode safely, but it's important to remember that it does not eliminate the cause or "dissolve" the stones. [54]

Antibacterial drugs are not standard for chronic cases without fever and signs of infection. They are needed when acute inflammation, empyema, bile duct inflammation, or other infectious complications are suspected, accompanied by fever, significant inflammation in laboratory tests, and confirmed imaging. In such situations, treatment is often performed in a hospital. [55]

The key radical treatment for symptomatic chronic calculous cholecystitis is gallbladder removal, most often laparoscopically. Recent reviews consider laparoscopic cholecystectomy to be the "gold standard" for symptomatic gallstones due to its predictable pain control and reduced risk of recurrence. [56]

Before a planned surgery, anesthesia risks are assessed and the anatomy of the bile ducts is clarified. If there are signs of a common bile duct stone (jaundice, cholestasis in laboratory tests, or duct dilation), the strategy is to first confirm the problem and then remove the stone endoscopically or during surgery at a specialized center. This step is critical, as a missed duct stone can cause complications after gallbladder removal. [57]

In cases of confirmed common bile duct stones, one common option is endoscopic intervention with dissection of the sphincter of the major duodenal papilla and stone extraction, followed by cholecystectomy. In experienced centers, laparoscopic exploration of the common bile duct may be an alternative, but the choice depends on the equipment and experience of the team. [58]

In people with high surgical risk, when standard cholecystectomy is dangerous, gallbladder drainage may be a temporary or alternative solution. The classic option is percutaneous puncture cholecystostomy under image guidance, which reduces pressure and inflammation in complicated cases and then allows the possibility of surgery to be considered later. [59]

In recent years, endoscopic ultrasound-guided gallbladder drainage techniques with the placement of specialized stents have been rapidly developing. These technologies are considered an option for patients for whom surgery is contraindicated and are discussed in reviews and consensus documents as a "bridge" to stabilization or as a long-term solution in certain groups. [60]

Medicinal "dissolution" of stones with ursodeoxycholic acid is only possible in a limited group of patients: most often, for small cholesterol stones, when the gallbladder remains functional and there is no calcification of the stones. Even with proper selection, treatment takes months, and the risk of recurrence of stones after discontinuation remains, so the method is used selectively. [61]

In some cases, shock wave lithotripsy followed by dissolution of the fragments with bile acids is discussed, but this approach is rarely used due to the availability of cholecystectomy and the risk of recurrence. It is more often considered an option when surgery is undesirable and the criteria for dissolution are met. [62]

After cholecystectomy, most people do not require a strict lifelong diet, but during the adjustment period, it is helpful to avoid very fatty foods and large meals. If diarrhea occurs after surgery, the doctor can evaluate the role of bile acids and, if necessary, prescribe bile acid binders and adjust the diet. [63]

Contemporary surgical "new techniques" are more concerned with improving surgical safety than with replacing surgery. Intraoperative visualization of the bile ducts, more frequent use of subtotal cholecystectomy in severe inflammation, and "critical safety review" standards to reduce the risk of bile duct injury are widely discussed. [64]

Prevention

Prevention of chronic calculous cholecystitis primarily involves preventing stone formation and the progression of asymptomatic stones to symptomatic disease. The most effective strategy is maintaining a healthy body weight, but avoiding sudden weight loss, as rapid weight loss increases the risk of stone formation. [65]

A diet with adequate fiber, moderate saturated fat, and regular physical activity helps reduce metabolic risk factors. There is no universal "forbidden list" of foods, but in people with existing symptoms, fatty foods often trigger attacks, and this should be considered before radical treatment. [66]

When planning weight loss programs, especially surgical ones, prevention may include discussion of drug-based stone prophylaxis and follow-up. This is decided on an individual basis, as risk depends on the rate of weight loss and underlying factors. [67]

If symptoms have already appeared, preventing complications involves choosing a treatment strategy in a timely manner, as recurring colic increases the likelihood of complications. In such a situation, "suffering and waiting" often leads to repeat visits and increases the risks. [68]

Forecast

With the right approach, the prognosis is usually favorable. After gallbladder removal, recurrence of gallbladder-related biliary colic ceases, and the risk of many stone complications is significantly reduced. [69]

If surgery is delayed during symptomatic colic, symptoms often persist and may become more frequent. Guidelines emphasize that symptoms develop in some individuals at a rate of approximately 1-4% per year, with complications most often occurring after colic has already begun. [70]

The prognosis worsens not because of the chronic inflammation itself, but because of complications: stones in the common bile duct, bile duct inflammation, pancreatitis, and severe acute cholecystitis. Therefore, any signs of complications require a more urgent strategy. [71]

In people with severe comorbidities, the prognosis is determined by a balance of risks: sometimes it is safer to first stabilize the condition with drainage and treatment of complications, and then consider surgery in more favorable conditions. [72]

FAQ

Is it possible to live with stones and do nothing?

If stones don't cause symptoms, observation is often the preferred treatment. However, if recurring pain occurs after eating, especially typical biliary colic, active treatment should be considered, as symptoms often return. [73]

Why does pain appear after eating fatty foods?

Fat stimulates gallbladder contraction. If the bile flow is obstructed by a stone or the wall is chronically inflamed and contracts poorly, spasm and pain occur. [74]

Are antibiotics necessary for every flare-up?

No, antibiotics are needed for signs of infection and complications, not for every colic episode. The decision is based on temperature, blood tests, and imaging data. [75]

Is it possible to dissolve stones with medications?

Sometimes yes, but only under certain conditions: small cholesterol stones, a functioning gallbladder, and no calcification. Treatment is long-term, and relapses are possible, so the method is used selectively. [76]

What does a critical safety review mean in surgery?

This is a standard safety principle for laparoscopic cholecystectomy: the surgeon must clearly visualize the anatomy to reduce the risk of bile duct injury. Professional society guidelines consider this approach preferable for identifying structures. [77]

Key points from guidelines and expert opinions

Professor L. Michael Brant, MD, Professor of Surgery, Minimally Invasive Surgery Specialist, Washington University in St. Louis, United States of America.

Translation of the quote: “If there is one thing that helps minimize the risk of bile duct injury, it is understanding and applying critical safety review in every case when possible.” [78]

Professor Stephen M. Strasberg, MD, Professor of Surgery, Hepatobiliary Surgery Specialist, Washington University in St. Louis, United States of America.

Translation of the quote from the description of the criteria: “The gallbladder contains 2 and only 2 structures, and they can be seen circumferentially.” [79]

Professor Stephen M. Strasberg and Professor L. Michael Brant, surgeons, are the authors of the key paper on the critical safety review.

Translation of the quote: “Creating only 2 “windows” does not satisfy the requirements of the critical security review.” [80]

Dr. Lorenzo Mencarini, MD, author of the clinical review on cholecystitis (open access scientific review).

Translation of the quote: “Expert guidelines recommend very early (no later than 72 hours) or early cholecystectomy.” This thesis applies to acute cholecystitis, but is important for understanding modern approaches to the “time window” of surgery during exacerbations. [81]