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Year : 2014  |  Volume : 3  |  Issue : 2  |  Page : 157-161

Correlation between gallstones characteristics and gallbladder mucosal changes: A retrospective study of 313 patients

1 Department of Surgery, Kalpana Chawla Government Medical College, Karnal, India
2 Departments of Surgery and Pathology, Bhagat Phool Singh Government Medical College for Women, Khanpur Kalan, Sonepat, Haryana, India

Date of Web Publication9-Apr-2014

Correspondence Address:
Sunder Goyal
Department of Surgery, Kalpana Chawla Government Medical College, Karnal, Haryana - 132 001
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/2278-0513.130215

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Background and Aim: Gallbladder (GB) cancer has poor prognosis as it progresses very fast. Etiology or pathogenesis of GB cancer is still obscure and very little is known about it. A better understanding of risk factors that lead to its development could help improve the management options. Presence of stones in GB generates varied mucosal reaction which results in different types of histopathological changes. Our aim was to correlate the various types of mucosal response like inflammation, hyperplasia, metaplasia, and carcinoma to different gall stones characteristics (like number and morphology type). Materials and Methods: A retrospective study of 346 cases of removed GB was done which was based on the histological changes. A total of 313 (90%) were associated with gallstones and the rest 33 cases (10%) were of acalculous cholecystitis. The changes in mucosa of calculous GB (313 cases) were studied and correlation between the mucosal changes and the number and type of stones was evaluated. Varied parameters of gall stones like number and morphological type were studied. Tissue section for histopathological studies was taken from fundus, body, neck, and from abnormal looking areas while doing grossing. Results: Gender study revealed a higher incidence of inflammatory changes in males, while GB hyperplasia, intestinal metaplasia, and cancer were only found in females. A progressive increase in the average age was noticed fromintestinal metaplasia to carcinoma, suggesting that the metaplasia-carcinoma succession may occur in GB cancer. Conclusion: Correlation of mucosal changes with size and morphological type of stones has suggested that there could be an association between some histological alterations of GB and cancer.

Keywords: Carcinoma, gallbladder, intestinal metaplasia

How to cite this article:
Goyal S, Singla S, Duhan A. Correlation between gallstones characteristics and gallbladder mucosal changes: A retrospective study of 313 patients. Clin Cancer Investig J 2014;3:157-61

How to cite this URL:
Goyal S, Singla S, Duhan A. Correlation between gallstones characteristics and gallbladder mucosal changes: A retrospective study of 313 patients. Clin Cancer Investig J [serial online] 2014 [cited 2021 Dec 2];3:157-61. Available from:

  Introduction Top

Cholelithiasis is seven times more common in North India with an overall incidence of about 2.29%. Number and different morphology of gallstones cause alteration in GB mucosa. GB mucosal change depends upon the duration of cholelithiasis and also on the gender of patient. Coexistence of gallstones with cholecystitis, hyperplasia, intestinal metaplasia, and carcinoma is well-known in literature. Incidental gallbladder (GB) carcinoma is revealed in 0.3-2% of all cholecystectomies done for benign conditions. Pathological stage of the disease decides the prognosis of disease. GB metaplasia is characterized by intestinal or pyloric-type epithelium found in association with cholelithiasis. [1] Histopathological changes can predict the increased chances of GB cancer. GB cancer is the fifth most common cancer of the gastrointestinal tract. [2],[3] It is a disease known for its fast growth and high mortality rate. Etiology and pathogenesis of GB cancer is not well-known. The main difficulty in studying the precursor lesions of this disease is the fact that it is impossible to perform follow-up, because the diagnosis is established during surgery or after the cholecystectomy. Therefore, the evidence relating these lesions to the cancer is determined indirectly. A better understanding of the risk factors for GB cancer and premalignant lesions of the GB could help in selection of prophylactic cholecystectomies and thus reduction in mortality. [4] Due to above reason, mucosal changes in GB due to stones were studied.

  Materials and Methods Top

A retrospective study was carried out in a rural medical college between Jan 2012 and Feb 2013 and total 346 patients who underwent cholecystectomies were evaluated. Out of 346, 90% (313) were associated with gallstones and the rest 10% (33) cases were of acalculous cholecystitis. We studied the changes in mucosa of calculous gall bladder (313 cases). The stones were evaluated for variousparameters; 1) number: Single/multiple, 2) morphological type: Cholesterol/pigmented/combined/mixed. The histopathological examination was done by a single senior pathologist. Four sections; two from body and one each from the fundus and neck of GB were taken. Additional sections were taken from abnormal appearing mucosa. Sections were stained with hematoxylin and eosin stain [Figure 1].
Figure 1: Microscopic picture of gall bladder wall revealing (a) Gastric metaplasia (H and E, ×40), (b) Intestinal metaplasia (H and E, ×40), (c) Papillary hyperplasia (H and E, ×10), and (d) Adenocarcinoma (H and E, ×40)

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An abdominal ultrasound examination was used to diagnose cholecystolithiasis in all the patients. GB changes suggestive of GB cancer were not confirmed in any of the patients during the preoperative stage.

Age of patients ranged from 12 to 89 years. In all patients, the surgeon did a macroscopic examination of the removed GB on the operation table. Tissue was sent for histopathological examination.

The pattern of response in GB mucosa such as inflammation, (acute cholecystitis, chronic cholecystitis), empyema (abscess), xanthogranulomatous cholecystitis, hyperplasia, intestinal metaplasia, dysplasia, and malignant changes was studied with regard to number and morphological type of stones.

  Results Top

A total of 346 consecutive specimens of cholecystectomy were examined, out of which 313 (90%) were associated with gallstones and the rest 33 cases (10%) were of acalculous cholecystitis. We studied the changes in mucosa of calculous gall bladder (313 cases) and tried to find out if any correlation existed between the mucosal changes and the number and type of stone. Out of total 313 patients, 60 were males and 253 were females with an M: F ratio of 1:4.2. Maximum number of patients was in the age group of 30-39 years. The youngest patient was a 12 year-old-male, while the oldest was a female. Maximum females suffered were between 30 and 49 years age group, whereas maximum male suffered were 50-69 years age group [Table 1] and [Table 2].

Incidence of acute cholecystitis higher in male patients as compared with female patients.
Table 1: Relation various mucosal changes with gender

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Table 2: Various gallbladdermucosa changes according to various age groups

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Incidence of metaplasia is higher in elderly female patients. Patients suffering with metaplasia are younger than patients suffering with GB cancer and age difference is about 10-15 years [Table 3].
Table 3: Correlation between morphological types and number of stones

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Mixed type of stone was the most frequently encountered stone present in 213 cases (68%), which was predominantly multiple in numbers; followed by combined type which in most cases was single in number. Pigment and cholesterol stones were present in only 18 and 17 cases, respectively. A total of 218 patients had multiple stones, while 95 patients had single stone [Table 4].
Table 4: Various types of mucosal changes

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On studying the gall bladder mucosa microscopically, the most common change observed was chronic cholecystitis (181 cases, 58%). Gastric metaplasia was the second most common finding along with chronic cholecystitis, present in 31 cases (10%), followed by acute on chronic inflammation and intestinal metaplasia with 30 cases each [Table 5].
Table 5: Various types of mucosal changes in relation to number of stones

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While correlating the mucosal changes with the number of stones, it was found that almost all the lesions were more common in GB with multiple number of stones (may be owing to the factor that multiple stones are far more common than single (72%) except papillary hyperplasia which was more frequently associated single stone). Among the other changes, multiple stones were more associated with follicular cholecystitis, xanthogranulomatous cholecystitis, metaplasia (both gastric and intestinal), and carcinoma [Table 6].
Table 6: Correlation of mucosal changes with morphology of stones

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While considering the type of stone, it was found that cholesterolosis was more common in patients with cholesterol stone; which is a well-known fact by now. Eosinophilic cholecystitis, follicular cholecystitis, and adenomatoid hyperplasia was associated with mixed stones only. Papillary hyperplasia did not show any significant predilection with any type of stone. Gastric metaplasia was a more common finding with mixed type (67.7%) of stone, whereas 80% of cases with intestinal metaplasia had combined stones. Three out of four cases of carcinoma had multiple mixed stones, while the remaining one had single combined stone.

  Discussion Top

In Northern India, gallstones are seven times more common with overall incidence of about 2.29%. A retrospective study of 346 patients was carried out to find out correlation between gallstones and GB mucosal changes. It is a well-known fact that a relationship exist between cholecystolithiasis and GB cancer as cholecystolithiasis is associated in over 80% of all GB cancer cases. [4] In one study, incidence of GB cancer is about 1.68%, whereas it is 3.5% in another study in which multiple histopathological section of GB was examined. [5] Coexistence of cholecystolithiasis with xanthogranulomatous cholecystitis, adenomyomatosis, and pyloric and intestinal metaplasia is well-known in literature. In our study, the age of patients ranged from 12 to 89 years. Majority of patients were in between 30 and 39 years. Main suffers were females with male: Female ratio being 1:4.2 an incidence similar to other studies. [6],[7] Cholelithiasis is common in elderly females due to female sex hormone and sedentary habits. [8]

Mixed stones (70.55%) are most commonly encountered variety of gallstones in North India as in our study. [6],[9] The incidence of cholesterol stones was in 5.43% (17/313), of pigmented stones was 5.75%, (18/313), of combined type was 20.76% (65/313), and of mixed type 68.05% (213/3130).

Single stones were in 95/313 (30.35%) and multiple stones were in 218/313 (69.64%) patients as in other reports. [7],[10],[11] This indicates that cases having multiple stones are more symptomatic (cholecystitis) than with single stone and mucosal changes like hyperplasia, metaplasia, and carcinoma were also more common in cases with multiple mixed type of stone.

In our study, when multiple section of GB like fundus, body, and neck, was scrutinized properly then dysplasia and carcinoma in situ were detected in 72/313 (23.00%) and 4/313 (1.27%) patients, respectively. In the study of Jukemura et al., [5] reported 1.68% incidence of GB cancer in 475 removed GB when whole of the GBs were examined in totality. Precancerous GB mucosal changes have got clinical as well as pathological significance. However, theses changes are frequently overlooked by pathologist. [12]

In our study, GB mucosal hyperplasiawas found in 72/313 (23%) cases which is low as compared with Khanna et al., study where the incidence was 59%. Suffers were only females. The primary cholelithiasis causes mechanical mucosal irritation and result in hyperplasia.

Intestinal metaplasia was encountered in only 61/313 cases (19.480%). This incidence is comparable to other studies. [7] Only elderly females were suffer as in others reports.

Out of 313 cases of cholelithiasis, GB carcinoma was encountered in 1.27% (4/313). All affected patients were females and were in advance age group which is comparable with other reports. [13],[14],[15],[16] The increased risk of GB cancer in women is partially explained by the higher incidence of cholecystolithiasis in women as compared with men. Female hormones may play a role in the etiology of this disease. Higher and extended exposure to female sex hormones may be a main factor. Therefore, early menarche, early first pregnancy, multiple pregnancies, and delayed menopause may increase the risk of GB carcinoma. [4]

GB metaplasia changes were common in patients with multiple mixed stone as in other studies. This association seem to be relative and statistical association could not be demonstrated between number stones and mucosal response. [8] Domeyer et al., [12] reported that the solitary gall stones were important predictors of severe inflammation. Khanna et al., [7] and Roa et al.,[17] could not document any association between the two in their respective studies. [15],[17]

Xanthogranulomatous cholecystitis is an uncommon inflammatory and destructive GB process that can spread to adjacent structures and be confused with cancer. This histological alteration occurs in approximately 2% of all cholecystectomies, affects men and women equally and is frequently associated with gallstones. The occurrence of cancer in GBs with xanthogranulomatous cholecystitis has been reported and has been observed in 9-12% of these cases. Similarly, xanthogranulomatous cholecystitis presented a higher incidence within elderly individuals in this study and, interestingly, occurred more often among women.

In our study, the incidence of acute cholecystitis is higher in males as established in other studies. Acute cholecystitis has also been associated with cancer; however, in this study, there was no association between metaplastic lesions, dysplasia, or cancer and acute cholecystitis. [2]

With the advancing age the occurrence of cholecystolithiasis and GB cancer increases. An estimated 1% of the patients over the age of 65 with cholecystolithiasis may develop GB carcinoma, and it is related to the duration of gallstone disease rather than age of patients. [18] In our study, there were 4/313 cases of, adenomatoid hyperplasia which is a non inflammatory benign GB alteration which mostly occurs in middle age patients, and its incidence increases with age. It is presently identified as a precancerous lesion, and cancer cases associated with areas of adenomyomatosis have been reported. [19]

In our study, incidence of metaplasia and dysplasia increased with the age and the metaplastic alterations and dysplasia are taken as precancerous lesions. Yamagiwa and Tomiyama analyzed 1,000 resected GBs and observed that the number of cases of dysplasia and cancer increased with age and the highest incidence was among patients with higher age group. The incidence of intestinal and gastric metaplasia was also higher in advance age group (as in our study). [13],[15],[17],[20]

As GB cancer is extremely slow progressive disease, a prolong follow-up may be needed. [14] Ransohoff and Gracie [21] performed follow-up on 123 patients with asymptomatic cholecystolithiasis for seven years without incidence of GB cancer. Maringhini and associates performed follow-up on 2,583 patients for 13 years. During this period, five patients (0.2%) developed cancer.

Whether prophylactic cholecystectomy should be done in asymptomatic gallstones is still controversial. However, an Indian study recommends prophylactic cholecystectomies for asymptomatic gallstones in young patients with thickened GB wall (greater than 3 mm); with large gallstones (greater than 3 cm); patients with porcelain GB, sessile polyps (greater than 1 cm) and in peoples of areas with high incidence rates of GB cancer. [22]

The results of this study advocate that there could be an association between GB histological changes and GB carcinoma. Nonetheless, further work is needed to understand about various risk factors about GB cancer. This understanding is crucial to establish surgical treatments for the various pathological GB conditions, such as symptomatic or asymptomatic calculous cholecystitis.

  Conclusion Top

The results of this study recommend that there may be a relationship between some histological changes of GB and cancer, and they also put forward that the metaplasia-dysplasia-carcinoma sequence could in fact be true in the case of GB carcinoma. Nevertheless, further studies are needed to understand GB carcinogenesis and risk factors.

  References Top

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10.Domeyer PJ, Sergentanis TN, Zagouri F, Tzilalts B, Mouzakioti E, Parasi A, et al. Chronic cholecystitis in elderly patients. Correlation of the severity of inflammation with the number and size of the stones. In Vivo 2008;22:269-72.  Back to cited text no. 10
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21.Gracie WA, Ransohoff DF. The natural history of silent gallstones: The innocent gallstone is not a myth. N Engl J Med 1982;307:798-800.  Back to cited text no. 21
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  [Figure 1]

  [Table 1], [Table 2], [Table 3], [Table 4], [Table 5], [Table 6]

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