Chronological Review of Endoscopic Indices in Inflammatory Bowel Disease

Joon Seop Lee; Eun Soo Kim; Won Moon

doi:10.5946/ce.2018.042

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Review Chronological Review of Endoscopic Indices in Inflammatory Bowel Disease: Joon Seop Lee¹, Eun Soo Kim¹, Won Moon^2,; Clinical Endoscopy 2019;52(2):129-136.
DOI: https://doi.org/10.5946/ce.2018.042
Published online: August 21, 2018

¹Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Korea

²Department of Internal Medicine, Kosin University College of Medicine, Busan, Korea

Correspondence: Won Moon Department of Internal Medicine, Kosin University College of Medicine, 262 Gamcheon-ro, Seo-gu, Busan 49267, Korea Tel: +82-51-990-5207, Fax: +82-51-990-5055, E-mail: moonone70@hanmail.net

• Received: February 22, 2018 • Revised: April 30, 2018 • Accepted: May 2, 2018

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Abstract
INTRODUCTION
CHRONOLOGICAL APPROACH TO ENDOSCOPIC INDICES IN UC
CHRONOLOGICAL APPROACH OF ENDOSCOPIC INDICES IN CD
CONCLUSIONS
NOTES
REFERENCES

Abstract

Inflammatory bowel disease (IBD) is considered a chronic condition characterized by mucosal or transmural inflammation in the gastrointestinal tract. Endoscopic diagnosis and surveillance in patients with IBD have become crucial. In addition, endoscopy is a useful modality in estimation and evaluation of the disease, treatment results, and efficacy of treatment delivery and surveillance. In relation to these aspects, endoscopic disease activity has been commonly estimated in clinical practices and trials.

At present, many endoscopic indices of ulcerative colitis have been introduced, including the Truelove and Witts Endoscopy Index, Baron Index, Powell-Tuck Index, Sutherland Index, Mayo Clinic Endoscopic Sub-Score, Rachmilewitz Index, Modified Baron Index, Endoscopic Activity Index, Ulcerative Colitis Endoscopic Index of Severity, Ulcerative Colitis Colonoscopic Index of Severity, and Modified Mayo Endoscopic Score. Endoscopic indices have been also suggested for Crohn’s disease, such as the Crohn’s Disease Endoscopic Index of Severity, Simple Endoscopic Score for Crohn’s Disease, and Rutgeerts Postoperative Endoscopic Index. However, most endoscopic indices have not been validated owing to the complexity of their parameters and inter-observer variations. Therefore, a chronological approach for understanding the various endoscopic indices relating to IBD is needed to improve the management.
Keywords: Colitis, ulcerative; Crohn disease; Endoscopic index; Colonoscopy

INTRODUCTION

Inflammatory bowel disease (IBD) is considered a chronic phenomenon that induces mucosal or transmural inflammation in the gastrointestinal tract. Endoscopy has a critical role in the treatment of patients with IBD by estimating the severity of disease activity in the intestinal mucosa and the efficacy of therapeutic agents [1]. As a result, endoscopic diagnosis and healing in patients with IBD have become crucial [2]. Because ulcerative colitis (UC) presents mucosal lesions involving the large intestine, the role of endoscopy is also integral. By contrast, inflammation in Crohn’s disease (CD) commonly manifests as transmural inflammation and involves the entire intestine; therefore, affected areas are not accessible by an endoscope [3]. However, endoscopy has integral roles in diagnosing the involvement and severity of diseases, e.g., estimation of treatment efficacy and delivery and cancer surveillance [4]. Furthermore, since the introduction of new therapies using anti-tumor necrosis factor drugs, the management of patients with IBD has changed substantially. Therefore, endoscopic disease activity has been commonly estimated in clinical practices and trials.

In addition to endoscopic estimation, a new concept of managing the involved intestines in patients with IBD has emerged, i.e., mucosal healing (MH). In IBD, the term MH is described on the basis of endoscopic assessment and is usually considered to reflect healing of the mucosal lesions [5]. MH provides an objective estimation of medical treatment and alleviates the placebo effect associated with the clinical indices used previously. Accumulating evidence suggests that MH may modify the natural course of IBD [6]. At present, MH is defined as resolution of all ulcerations and histologic inflammation. Not presenting endoscopic MH can increase the incidence of colorectal tumors in UC. In addition, MH has decreased the frequency of surgery and rates of hospitalization in CD [7]. In these regards, MH assessed by endoscopic indices has an integral role in the clinical treatment of patients with IBD. To date, many endoscopic indices of IBD have been introduced. However, most of them have not been validated for various reasons, such as the complexity of their parameters and inter-observer variations. Because of this, a chronological review of endoscopic indices is needed for managing IBD and for developing novel and efficient endoscopic indices.

CHRONOLOGICAL APPROACH TO ENDOSCOPIC INDICES IN UC

Truelove and Witts Endoscopy Index - 1955

In 1955, the first description of endoscopic features in UC was reported by Truelove and Witts [8]. They suggested the outcomes of a randomized controlled trial of hydrocortisone therapy in active UC. In their study, they suggested a modality for estimating disease activity and named this scoring system as the Truelove and Witts Severity Index. It is composed of six variables: number of stools per day; blood in stools; temperature; pulse; hemoglobin level; and erythrocyte sedimentation rate. In addition, sigmoidoscopic findings were obtained at the end of the treatment and were classified as normal or near normal (slight hyperemia or slight granularity), improved, unchanged, or worse. Although the Truelove and Witts Endoscopy Index is a meaningful instrument for estimating the outcomes of medical treatment, it has not been used extensively because it is not a quantitative scoring modality.

Baron Index - 1964

In 1964, Baron et al. conducted a study on the inter-observer variability in describing the lesions of the rectum and sigmoid mucosa using a rigid sigmoidoscope in patients with UC [9]. The objective of their study was to describe the mucosal appearances noted on sigmoidoscopy. Patients were divided into two groups. In the first group, the variables used for the evaluation of the mucosal layer included the color, deep vessels, superficial vessels, moisture, friability, granularity, distensibility, polyp, ulcer, and lumen (blood, mucous, and feces). In the second group, different variables were used in each patient for evaluating the mucosal layer (vessels, spontaneous bleeding ahead of the instrument, touch bleeding, granularity, mucosal surface, ulceration, and rectal valves) and grading severity based on the severity of bleeding (normal, abnormal but not hemorrhagic, moderately hemorrhagic, and severely hemorrhagic). To reduce inter-observer differences, the observers selected the variables from the two groups with the highest agreement. Although this index presented an agreement regarding specific findings of the mucosal appearances, it has not been validated owing to the complexity of its use.

Powell-Tuck Index - 1982

In 1982, Powell-Tuck et al. reported sigmoidoscopic findings that correlated with clinical disease activity [10]. They conducted regular sigmoidoscopies when they performed a controlled trial of oral prednisolone as a therapy for patients with active UC. They compared the relationships between clinical signs and sigmoidoscopic appearances and categorized mucosal findings into non-hemorrhagic and hemorrhagic (bleeding on light touch and spontaneous bleeding). The study provided a clinically meaningful subdivision of hemorrhagic mucosa (bled spontaneously/bled on light touching or scraping).

Sutherland Index - 1987

In 1987, Sutherland et al. presented an assessment index of mucosal appearance [11]. They used this during a placebo-controlled trial of mesalamine enemas in patients with distal UC [11]. Mucosal appearances were described as normal, mild friability, moderate friability, exudation, or spontaneous bleeding. The authors insisted that the mucosal appearance assessment index in their study correlated to disease activity.

Mayo Clinic Index: Endoscopic Sub-Score - 1987

In 1987, Schroeder et al. presented the outcomes of a delayed-release oral form of mesalamine for therapy in patients with active UC [12]. The authors presented a modality for measuring disease activity, namely, the Mayo Endoscopic Score (MES). The MES consists of four descriptors: stool frequency, rectal bleeding, findings of flexible sigmoidoscopy, and physician global assessment. They defined this endoscopic subscore using a four-point scale for grading (Fig. 1). To date, the MES has been the most widely used index in clinical trials; however, it has not been formally validated yet. Nevertheless, it has produced good consistency among reports [13].

Rachmilewitz Index - 1988

In 1988, Rachmilewitz reported meaningful results on the use of coated mesalamine and sulfasalazine for therapy in patients with active UC [14]. In the trial, the authors suggested a scoring system of symptoms and endoscopic findings, which includes seven descriptors: number of stools, blood in stools, investigators’ global assessment of the symptomatic state, abdominal pain or cramps, fever, extra-intestinal manifestations, and laboratory findings. Further, the Rachmilewitz index uses four descriptors (granulation scattering reflected light, vascular pattern, vulnerability for the mucosa, and mucosal change). An endoscopic index of 0–4 indicates endoscopic healing. However, this modality has not been validated yet.

Modified Baron Index - 2005

In 2005, Feagan et al. presented the outcomes of a placebo-controlled trial of anti-α4β7 integrin antibody for therapy of severe UC [15,16]. In these reports, the authors described endoscopic activity using the Modified Baron Index (range, 0–4; normal mucosa [0], granular mucosa with an abnormal vascular pattern [1], friable mucosa [2], microulceration with spontaneous bleeding [3], and gross ulceration [4]). A Modified Baron Index of 0 indicates endoscopic resolution. Additionally, endoscopic estimation of treatment efficacy was considered on the basis of an increasing Modified Baron Index of at least 2 from the initial score. This index has already been validated.

Endoscopic Activity Index - 2010

In 2010, Naganuma et al. presented an index of endoscopic activity used for selecting therapeutic agents in patients with severe and active UC [17]. It is known as the Endoscopic Activity Index (EAI). The score has six descriptors, and scores of 0 to 2/3 were assigned on the basis of the severity of the descriptor, with a higher score indicating a more severe disease status. The results obtained from applying the EAI in colonoscopies in patients with UC were correlated with those obtained from the Matts’ classification or Rachmilewitz index. There was a wide variation in the EAIs in patients with the highest Matts’ classification or Rachmilewitz Index; it was suggested that the EAI could provide a more precise grade of severe diseases. The authors insisted that the EAI was precisely correlated with other endoscopic and clinical indices, derived from their statistical analysis. However, because various descriptors are presented, inter-observer variations might occur.

UC Endoscopic Index of Severity - 2012

In 2012, Travis et al. introduced a novel modality to measure the endoscopic severity of UC, i.e., UC Endoscopic Index of Severity (UCEIS) [18,19]. The UCEIS was developed from a two-phase study using a library of 670 video sigmoidoscopies from patients with Mayo Clinic scores ranging from 0 to 11, added by 10 videos from five individuals without UC and five hospitalized patients with acute severe UC. In phase 1, each of 10 investigators estimated 16 of 24 videos to evaluate the agreements on the Baron Index with a central reader and agreed on the definitions of 10 endoscopic descriptors. In phase 2, each of 30 different investigators rated 25 of 60 different videos for the items and assessed the overall severity on a 0–100-point visual analog scale (VAS). An index that presents the overall endoscopic disease status evaluated on the VAS was then developed. This index, which is described using endoscopic appearances, including vascular pattern scored 1 to 3, bleeding scored 1 to 4, and erosions/ulcers scored 1 to 4, was divided into different levels of severity (Fig. 2). The UCEIS has three descriptors (vascular pattern, bleeding, and erosions and ulcers); however, this was sufficient to serve as an index considering disease activity related to UC. Although the UCEIS precisely predicted the severity of UC, the reliability and validity should be confirmed. Additionally, as with the previous endoscopic indices, it originates from the gross estimation of the involved colon segment and does not consider the microscopic involvement of UC. Therefore, it cannot be used to confirm partial MH. However, the UCEIS is a simple and reliable modality compared with the previous indices.

UC Colonoscopic Index of Severity - 2013

In 2013, Samuel et al. from the Mayo Clinic introduced a full colonoscopy severity index, UC Colonoscopic Index of Severity (UCCIS) [20]. Colonoscopy videos from 51 patients were evaluated by seven gastroenterologists and edited into video clips characterizing five segments of the colorectum. Absence or presence was scored on the basis of edema, erythema, stricture, change in the haustral folds, rigidity, and pseudopolyps. The vascular pattern, granularity, ulceration, and bleeding friability were scored between 0 and 4 for specific parameters. The global measurement of endoscopic severity was then rated on a four-point scale and a 10-cm VAS. The UCCIS was derived from these, and this index is composed of four different descriptors (granularity, vascular pattern, ulceration, and bleeding friability), all of which are summed from the five segments (rectum and sigmoid, descending, transverse, and ascending colon). The index had been validated with a high inter-observer agreement [20]. However, there is a complexity in obtaining the final score. In this regard, although it is an accurate index, the UCCIS might not be simple enough to be used in clinical practice. Additionally, it has the inability to provide information on the histological status.

Modified MES - 2015

The MES is a widely known and used endoscopic index in clinical trials and practices. However, there was a need for a more precise measurement of endoscopic indices in UC that considers the severity and involvement of mucosal change on the basis of the MES. In 2015, Lobatón et al. introduced a novel index to estimate the segment involvement and endoscopic severity in patients with UC; this was conferred as the modified MES (MMES) [21]. Dividing the colon into five segments, the MES was obtained from each segment with a given modified score. This score is then calculated as the maximal extent of the disease and categorized by the number of segments with an active disease to obtain the MMES. The MMES includes the maximal extent of the involved segment; in cases of proctitis/left-sided colitis, sigmoidoscopy is usually sufficient for measurement. In addition, the MMES can be easily used for UC because it combines the disease status of the MES and a score correlated with the clinical and histological status. However, the MMES has some weak points. The endoscopies were not video-recorded; because of this, the inter-observer agreement was not measured and has yet to be validated.

Summary

In 1955, Truelove and Witts first commented on the mucosal status as a measurement of disease activity using rigid sigmoidoscopy in a placebo-controlled trial of cortisone for UC. The prototype endoscopic indices were introduced to estimate the endoscopic status of the disease but not the involved segment in UC. These indices include the Baron Index, Powell-Tuck Index, Sutherland Index, MES, and Rachmilewitz Index. Most of their endoscopic descriptors have a similarity. The MES is simple and widely used in clinical trials and practices for estimating the effectiveness of treatment. However, none of the endoscopic indices mentioned previously have been validated. To date, the UCEIS has been suggested to originate from grading systems including endoscopic findings. The UCEIS, in addition to the previous endoscopic indices, is based on the endoscopic evaluation of the disease extent and does not consider the histologic severity of the disease. To date, the UCCIS is the only endoscopic index covering all the colonic segments. This is measured by four different variables. All of these descriptors are calculated from each of the five segments of the colorectum. The UCCIS has been validated with a high correlation among observers. Among these endoscopic indices, the MES is the most commonly used index in clinical trials and practices. However, the features of the different levels overlap in the MES, and this endoscopic index is ambiguous in describing endoscopic findings, which causes high inter-observer variations. The summarized descriptors of these endoscopic indices are presented in Table 1.

CHRONOLOGICAL APPROACH OF ENDOSCOPIC INDICES IN CD

CD Endoscopic Index of Severity - 1989

The CD Endoscopic Index of Severity (CDEIS) was introduced in 1989 by the French group GETAID [22]. Two endoscopists viewed colonoscopies from 75 patients. One endoscopist conducted the procedure, whereas the other endoscopist observed. The sum of the score (range, 0–44) was measured from a formula composed of the presence and extent of the ulcerated and inflamed mucosa and stenosis from different portions (Table 2, Fig. 3). The CDEIS has a high sensitivity for measuring mucosal lesions. In the CDEIS, a score of less than or equal to 7 indicates endoscopic resolution, and a score of less than or equal to 4 indicates complete endoscopic resolution. A score that decreases from the initial score by at least 4 or 5 points indicates an endoscopic response. The strength of the CDEIS is its high correlation with lesion severity and low inter-observer variability. A recent study demonstrated good agreement on using the CDEIS [23]. Therefore, the CDEIS is considered a reproducible index. However, it is associated with complexity in usage and training needed to estimate the extent of diseased mucosal surfaces and to measure the depth of ulcerations.

Simple Endoscopic Score for CD - 2004

In 2004, the Simple Endoscopic Score for CD (SES-CD) was suggested to address the complexities of the CDEIS [24]. The descriptors of the SES-CD were developed after reviewing the GETAID studies. From this effort, the SES-CD was found to include important and reproducible endoscopic characteristics of CD. The SES-CD includes four variables from 0 to 3 in five segments of the ileum and colorectum. In this score, ulcers are categorized by size, and affected lesions with ulcerated surfaces and intestinal surfaces are classified according to extension (Figs. 4, 5). The total score is attained from the sum of all the descriptors in each segment (range, 0–56). Most importantly, the SES-CD correlates well with the CDEIS. In this regard, the SES-CD has a strength in clinical trials and practices. However, similar to the CDEIS, the SES-CD has some limitations. To date, there is no agreement on the cut-off values for defining the endoscopic efficacy of therapies and MH. Additionally, the SES-CD does not consider the number of examined portions.

Rutgeerts Postoperative Endoscopic Index - 1984

In cases of postoperative CD, endoscopic findings were first described in 1984 [25,26]. In one of these reports, 114 patients underwent ileocolic resection. Less than 1 year after surgery, 29 of these 114 patients were examined, and 72% had recurrent CD, which was mostly located at the neo-terminal ileum and ileocolic anastomosis site. Small aphthous ulcers in the ileocolic anastomosis site were the early endoscopic parameters of recurrence. At the first colonoscopy, ileal lesions were measured. The index was developed for grading endoscopic postoperative recurrence at the ileocolic anastomosis site. The Rutgeerts Postoperative Endoscopic Index is the only postoperative endoscopic scoring system. It has been used to assess the presence of endoscopic recurrence at the neo-terminal ileum. Therefore, it has become the standard index for estimation of MH in postoperative CD. However, this index has weak points in that it lacks validation and evaluation for inter-observer agreements.

Summary

The CDEIS is the standard index but is complex, whereas the SES-CD is a simplified version. The Rutgeerts Postoperative Endoscopic Index is used for estimating the risk of recurrence after ileocolic resection due to CD. The CDEIS has strengths in that it is validated and has been used in several trials. This leads to early detection of endoscopic disease activity. Thus, it allows physicians to compare different endoscopic examinations. However, it is a complex scoring system that requires an effort to be summed and is not fit for use in clinical practice. The SES-CD simplified some CDEIS descriptors, and the results may be similar with those of the CDEIS items. However, this score is still complex, needs time to be calculated, and is not easy to use in clinical practice. The Rutgeerts Postoperative Endoscopic Index defines the severity of endoscopic disease recurrence at the anastomosis site postoperatively. It has some strengths, such as popularity and ease of use in routine practice. However, there are agreement concerns, and the index has not been validated yet.

CONCLUSIONS

Performing endoscopy frequently and regularly may yield problems, including complaints of discomfort and low patient compliance. Although endoscopy is considered a lowrisk procedure, endoscopic procedures sometimes carry risks, such as perforation and bleeding. However, colonoscopy has a integral role in diagnosing IBD [27]. Furthermore, endoscopic indices, as estimated by endoscopy, are needed for assessing and guiding treatment in patients with IBD; many endoscopic indices have been introduced and used in clinical trials and practices (Fig. 6). In this regard, more practical and reliable endoscopic indices should be introduced. Although there are many endoscopic indices, they present a low validation rate owing to the complexity of the scoring system and high variations. In future research, it is important for endoscopic indices to have simplicity in variables, reliability, validity, and responsiveness. To improve the evaluation of patients with IBD, endoscopic indices should present the histologic status of the intestinal mucosa and MH.

Conflicts of Interest: The authors have no financial conflicts of interest.

Fig. 1.

Endoscopic images according to the Mayo Endoscopic Score. (A) Grade 0 (normal or inactive disease), (B) grade 1 (mild disease), (C) grade 2 (moderate disease), and (D) grade 3 (severe disease).

Fig. 2.

Endoscopic images according to the Ulcerative Colitis Endoscopic Index of Severity. For vascular pattern, (A) 1, (B) 2, and (C) 3; for bleeding, (D) 1, (E) 2, (F) 3, and (G) 4; and for erosions and ulcers, (H) 1, (I) 2, (J) 3, and (K) 4.

Fig. 3.

Endoscopic images according to the Crohn’s Disease Endoscopic Index of Severity. (A) Superficial ulceration and (B) deep ulceration.

Fig. 4.

Endoscopic images according to the Simple Endoscopic Score for Crohn’s Disease. For the size of ulcers, (A) aphthous ulcers, (B) large ulcers, and (C) very large ulcers.

Fig. 5.

Endoscopic images according to the Crohn’s Disease Endoscopic Index of Severity (CDEIS) and Simple Endoscopic Score for Crohn’s Disease (SES-CD). For ulcerated and affected surfaces, (A) CDEIS (score 10.0) and SES-CD (score 3.0) and for ulcerated impassable stenosis, (B) CDEIS (score 3.0) and SES-CD (score 3.0).

Fig. 6.

Chronicle of endoscopic indices in inflammatory bowel disease. CDEIS, Crohn’s Disease Endoscopic Index of Severity; SES-CD, Simple Endoscopic Score for Crohn’s Disease; UCEIS, Ulcerative Colitis Endoscopic Index of Severity.

Table 1.

Descriptors of Endoscopic Indices in Ulcerative Colitis

Index	VP	B	E/U	F	G	H	ME	Ex
Truelove and Witts					●	●
Baron	●	●		●
Powell-Tuck		●
Suntherland		●		●				●
Mayo	●	●	●	●		●
Rachmilewitz	●		●	●	●
Modified Baron	●	●	●	●	●
Endoscopic Activity		●	●			●	●	●
UCEIS	●	●	●

B, bleeding; E/U, erosion/ulceration; Ex, exudate; F, friability; G, granularity; H, hyperemia; ME, mucosal edema; UCEIS, Ulcerative Colitis Endoscopic Index of Severity; VP, vascular pattern.

Table 2.

Example of the CDEIS Scoring Form

	Rectum	Sigmoid & Left colon	Transverse colon	Right colon	Ileum	total
Deep ulcerations (12 present, 0 absent)	0	12	0	12	N/A	24	Total 1
Superficial ulceration (6 present, 0 absent)	6	6	6	6	N/A	24	Total 2
Surface involved by the disease (per 10 cm)	7	9	4	9	N/A	29	Total 3
Ulcerated surface (per 10 cm)	5	7	2	7	N/A	21	Total 4
Total 1 + Total 2 + Total 3 + Total 4						98	Total A
Number (n) of segments totally or partially examined (1–5)						4	n
Total A divided by n						24.5	Total B
Quote 3 if ulcerated stenosis anywhere, 0 if not						3	C
Quote 3 if non-ulcerated stenosis anywhere, 0 if not						0	D
Total B+C+D						27.5	CDEIS

CDEIS, Crohn’s Disease Endoscopic Index of Severity; N/A, not available.

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Chronological Review of Endoscopic Indices in Inflammatory Bowel Disease

Clin Endosc. 2019;52(2):129-136. Published online August 21, 2018

DOI: https://doi.org/10.5946/ce.2018.042

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Current status of image-enhanced endoscopy in inflammatory bowel disease

Chronological Review of Endoscopic Indices in Inflammatory Bowel Disease

Fig. 1. Endoscopic images according to the Mayo Endoscopic Score. (A) Grade 0 (normal or inactive disease), (B) grade 1 (mild disease), (C) grade 2 (moderate disease), and (D) grade 3 (severe disease).

Fig. 2. Endoscopic images according to the Ulcerative Colitis Endoscopic Index of Severity. For vascular pattern, (A) 1, (B) 2, and (C) 3; for bleeding, (D) 1, (E) 2, (F) 3, and (G) 4; and for erosions and ulcers, (H) 1, (I) 2, (J) 3, and (K) 4.

Fig. 3. Endoscopic images according to the Crohn’s Disease Endoscopic Index of Severity. (A) Superficial ulceration and (B) deep ulceration.

Fig. 4. Endoscopic images according to the Simple Endoscopic Score for Crohn’s Disease. For the size of ulcers, (A) aphthous ulcers, (B) large ulcers, and (C) very large ulcers.

Fig. 5. Endoscopic images according to the Crohn’s Disease Endoscopic Index of Severity (CDEIS) and Simple Endoscopic Score for Crohn’s Disease (SES-CD). For ulcerated and affected surfaces, (A) CDEIS (score 10.0) and SES-CD (score 3.0) and for ulcerated impassable stenosis, (B) CDEIS (score 3.0) and SES-CD (score 3.0).

Fig. 6. Chronicle of endoscopic indices in inflammatory bowel disease. CDEIS, Crohn’s Disease Endoscopic Index of Severity; SES-CD, Simple Endoscopic Score for Crohn’s Disease; UCEIS, Ulcerative Colitis Endoscopic Index of Severity.

Fig. 1.

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Fig. 6.

Chronological Review of Endoscopic Indices in Inflammatory Bowel Disease

Index	VP	B	E/U	F	G	H	ME	Ex
Truelove and Witts					●	●
Baron	●	●		●
Powell-Tuck		●
Suntherland		●		●				●
Mayo	●	●	●	●		●
Rachmilewitz	●		●	●	●
Modified Baron	●	●	●	●	●
Endoscopic Activity		●	●			●	●	●
UCEIS	●	●	●

	Rectum	Sigmoid & Left colon	Transverse colon	Right colon	Ileum	total
Deep ulcerations (12 present, 0 absent)	0	12	0	12	N/A	24	Total 1
Superficial ulceration (6 present, 0 absent)	6	6	6	6	N/A	24	Total 2
Surface involved by the disease (per 10 cm)	7	9	4	9	N/A	29	Total 3
Ulcerated surface (per 10 cm)	5	7	2	7	N/A	21	Total 4
Total 1 + Total 2 + Total 3 + Total 4						98	Total A
Number (n) of segments totally or partially examined (1–5)						4	n
Total A divided by n						24.5	Total B
Quote 3 if ulcerated stenosis anywhere, 0 if not						3	C
Quote 3 if non-ulcerated stenosis anywhere, 0 if not						0	D
Total B+C+D						27.5	CDEIS

Table 1. Descriptors of Endoscopic Indices in Ulcerative Colitis

B, bleeding; E/U, erosion/ulceration; Ex, exudate; F, friability; G, granularity; H, hyperemia; ME, mucosal edema; UCEIS, Ulcerative Colitis Endoscopic Index of Severity; VP, vascular pattern.

Table 2. Example of the CDEIS Scoring Form

CDEIS, Crohn’s Disease Endoscopic Index of Severity; N/A, not available.