Validation of the Lyon classification for GORD diagnosis: acid exposure time assessed by prolonged wireless pH monitoring in healthy controls and patients with erosive oesophagitis.

OBJECTIVE: Acid exposure time (AET) from ambulatory pH studies and reflux oesophagitis are independent measurements used by the Lyon classification to diagnose GORD. This study aimed to validate AET reference ranges and diagnostic thresholds by analysis of 96-hour wireless pH studies from healthy, asymptomatic controls (HCs) and patients with and without oesophagitis. DESIGN: HC and consecutive patients referred for wireless pH studies (off acid suppressants for >7 days) underwent 96-hour pH studies at two tertiary referral centres. Erosive oesophagitis was categorised by the Los Angeles (LA) classification. Linear regression and receiver operating curve (ROC) analysis were performed to define optimal diagnostic cut-offs. RESULTS: Prolonged, 96-hour pH studies were completed in 39 HCs (age 28 (18-53) years, 72% female) and 944 patients (age 46 (16-85) years, 65% female), of whom 136 (14.5%) had reflux oesophagitis. Median AET in HC was 1.3% (upper 95th percentile 4.6%) for any study day and 2.6% (upper 95th percentile 6.9%) for the worst day (24-hour period) during the study. ROC analysis for average AET differentiated HC from patients with moderate-to-severe oesophagitis (LA BCD; sensitivity 87%, specificity 95%, positive predictive value (PPV) 59%, negative predictive value 99% for a cut-off AET of 4.3%; area under the receiver operating curve 0.95). Specificity was higher, but PPV was substantially lower for severe oesophagitis (LA CD). 'Worst-day' analysis provided similar results; however, day-to-day variability was high. CONCLUSION: Diagnostic thresholds for average AET were identified that accurately discriminate between HCs and patients with erosive oesophagitis. The findings provide conditional support for diagnostic criteria for GORD proposed by the Lyon Consensus.

Clinical spectrum and risk factors associated with asymptomatic erosive esophagitis as determined by Los Angeles classification: A cross-sectional study.

BACKGROUND: Gastro esophageal reflux disease (GERD) is a chronic and recurrent disease, and it varies in regions. However, to date, there are no reports available on clinical features and the risk factors for the asymptomatic reflux esophagitis in Nepalese adults. METHODS: Data were gathered from 142 erosive patients who had undergone endoscopy at Bir Hospital, Kathmandu. Los Angeles classification was used to grade the severity of the disease. Patients were interviewed to find out the presence of various reflux symptoms. RESULTS: Based on the Los Angeles classification, the severity of the disease assessed was; grade A 31.8% (31/142), grade B 39.4% (56/142), grade C 33.8% (48/142), and grade D 4.9% (7/142). One hundred and twenty six (88.7%) subjects had reflux symptoms. Prevalence of asymptomatic esophagitis was 16(11.3%). Age was independently linked to asymptomatic esophagitis (P<0.05), and the odd of being asymptomatic appeared lower in younger adults (P<0.05; OR: 0.118; CI: 0.014-.994). CONCLUSION: A low prevalence of asymptomatic reflux esophagitis (RE) was seen. Most subjects experienced mild to moderate RE. Age remained an independent factor associated with reflux esophagitis, and the odds of being asymptomatic was lower in younger age.

Is pH Testing Necessary Before Antireflux Surgery in Patients with Endoscopic Erosive Esophagitis?

INTRODUCTION: The relationship between the Los Angeles (LA) grade of esophagitis and acid exposure by pH monitoring is unclear. The aim of this study was to correlate the results of pH testing in patients with esophagitis to determine at what LA grade of esophagitis a pH test is not necessary. METHODS: A retrospective review was performed of the records of all patients who underwent upper endoscopy and were found to have esophagitis graded using the LA system and who had pH monitoring from 2014 to 2016. An abnormal pH test was determined based on the DeMeester score. RESULTS: There were 56 patients with a median age of 57 years. Esophagitis was LA grade A in 19, B in 20, C in 15 and D in 2 patients. An abnormal pH score was present in 47 patients (84%). All patients with C or D esophagitis had an abnormal pH score compared to 79% and 75% of patients with A and B esophagitis, respectively. CONCLUSIONS: The presence of LA C or D esophagitis was always associated with increased esophageal acid exposure on pH testing and is proof of reflux disease. However, pH testing is recommended prior to antireflux surgery in patients with LA A or B esophagitis.

Helicobacter pylori infection and gastroesophageal reflux in children.

Some studies suggest that Helicobacter pylori (H. pylori) infection would be a protective factor for the gastroesophageal reflux. The aim of this study was to explore this fact. A group of 72 children, admitted in a pediatric gastroenterology regional center in Northeast Romania, diagnosed with gastroesophageal reflux by 24-hour continuous esophageal pH monitoring (results were interpreted using the Boix-Ochoa score), underwent upper endoscopy with gastric biopsy to detect the presence of H. pylori by the rapid urease testing and for bacteriological and histologic examination. 19 children (26.39%) had H. pylori infection, while 53 (73.61%) did not. The grade of esophagitis was classified according to the Los Angeles classification system. Out of 47 children with esophagitis A, 16 (34.04%) had H. pylori infection, while out of the 25 children with esophagitis B, only 3 (12%) had H. pylori infection, with statistic significance (χ2 = 54.69, P << 0.05, 95% confidence interval [CI]). Regarding the value of the Boix-Ochoa score, it appears that the presence of the H. pylori determines lower pH-metry scores (F = 8.13, P = 0.0015, 95% CI). The presence of the H. pylori was not an important factor in the gastroesophageal reflux. On the other hand its relationship with esophagitis appears to be inverse ratio. The fact that the H. pylori presence is statistically greater in the grade A esophagitis could confirm the hypothesis that the bacteria would slow down the development of the esophagitis.

Endoscopic classification of reflux esophagitis.

It is important to accurately classify the severity of reflux esophagitis, because the clinical response to treatment is dependent on the severity of erosive lesions. In Japan we had used Savary-Miller classification for endoscopic grading. In this classification stage I to III encompass mucosal erosions of increasing extent, while stage IV includes all complications, which make it difficult to follow the evolution of the esophagitis and its response to treatment. A new endoscopic classification was proposed at the World Congress of Gastroenterology in Los Angeles in 1994. A mucosal break was emphasized which was defined as an area of slough or erythema with a sharp demarcation between it and the adjacent mucosa. Mucosal breaks are classified into 4 grades from A to D according to their extension. The complica- tions are not included in this grading system. Japanese study revealed that only 20 % of patients with heartburn had grade Aio D. This means that LA classification is insufficient at least in Japan. We have proposed,the modified LA classification including grade M and N, adding the original classification. Grade M pre- sents minimal change esophagitis and an undemarcated erythema after treatment of the muco- sal break using H2 blocker or PPI, whilst grade N represents no findings of esophagitis. Now this modified LA classification is widely used in Japan.

[DAILY INTRAESOPHAGEAL pH-MONITORING IN THE DIAGNOSIS OF THE SEVERITY OF ESOPHAGITIS WITH GASTROESOPHAGEAL REFLUX DISEASE].

OBJECTIVE: To identify criteria of pH-grams to diagnose the severity of esophagitis and preneoplastic complications of GERD. MATERIALS AND METHODS: 63 patients aged from 18 to 70 with A, B, C degree of GERD, according to the Los Angeles classification and 15 patients with intestinal metaplasia of columnar epithelium and leukoplakia of the stratified squamous epithelium of the esophagogastric transition were examined. For daily intraesophageal pH-monitoring "Gastroscan-24", pH probes manufactured by ZAO NPP "Istok- system", Fryazino (Russia) were used. pH-grams were estimated according for indicators DeMeester. Endoscopy was performed by videoesofagogastroscopes of Evis Exera- system--160 and by the tools company "Olympus" (Japan). RESULTS: 5 options of pH-grams were selected, each of them may correspond to some degree of esophagitis, preneoplastic changes of the esophageal mucosa, esophageal and extraesophageal manifestations of GERD. CONCLUSION: Daily pH-monitoring of the esophagus can serve as a screening for the severity of esophagitis, preneoplastic changes of esophagogastric transition, for addressing the need of morphological studies and differential diagnosis of extraesophageal manifestations of GERD.

Investigation of relationships among gastroesophageal reflux disease subtypes using narrow band imaging magnifying endoscopy.

AIM: To investigate the relationships among subtypes of gastroesophageal reflux disease (GERD) using narrow band imaging (NBI) magnifying endoscopy. METHODS: A reflux disease questionnaire was used to screen 120 patients representing the three subtypes of GERD (n = 40 for each subtypes): nonerosive reflux disease (NERD), reflux esophagitis (RE) and Barrett's esophagus (BE). NBI magnifying endoscopic procedure was performed on the patients as well as on 40 healthy controls. The demographic and clinical characteristics, and NBI magnifying endoscopic features, were recorded and compared among the groups. Targeted biopsy and histopathological examination were conducted if there were any abnormalities. SPSS 18.0 software was used for all statistical analysis. RESULTS: Compared with healthy controls, a significantly higher proportion of GERD patients had increased number of intrapapillary capillary loops (IPCLs) (78.3% vs 20%, P < 0.05), presence of microerosions (41.7% vs 0%, P < 0.05), and a non-round pit pattern below the squamocolumnar junction (88.3% vs 30%, P < 0.05). The maximum (228 ± 4.8 vs 144 ± 4.7, P < 0.05), minimum (171 ± 3.8 vs 103 ± 4.4, P < 0.05), and average (199 ± 3.9 vs 119 ± 3.9, P < 0.05) numbers of IPCLs/field were also significantly greater in GERD patients. However, comparison among groups of the three subtypes showed no significant differences or any linear trend, except that microerosions were present in 60% of the RE patients, but in only 35% and 30% of the NERD and BE patients, respectively (P < 0.05). CONCLUSION: Patients with GERD, irrespective of subtype, have similar micro changes in the distal esophagus. The three forms of the disease are probably independent of each other.

Halitosis and tongue coating in patients with erosive gastroesophageal reflux disease versus nonerosive gastroesophageal reflux disease.

OBJECTIVE: The aim of this study was to investigate whether patients with diagnosed erosive gastroesophageal reflux disease (ERD) have an increased probability of halitosis and tongue coating compared to patients with nonerosive gastroesophageal reflux disease (NERD). MATERIALS AND METHODS: Sixty-six patients (33 males and 33 females) were recruited for the study and received an upper gastrointestinal endoscopy. The presence of ERD (n = 31) and NERD (n = 35) was classified based on the Los Angeles classification for erosive changes in the esophagus. Additionally, the patients filled in a questionnaire regarding their subjective assessment of halitosis, and an organoleptic assessment of halitosis, a measurement of oral volatile sulfur compounds (VSC) with the Halimeter, and a tongue coating index were performed. ERD and NERD subjects were compared with regard to Halitosis-related clinical and anamnestic findings. RESULTS: No statistically significant difference could be found between ERD and NERD patients regarding tongue coating index, organoleptic scores, and VSC values as well as self-perceived bad taste, tongue coating, and bad breath. CONCLUSIONS: These data suggest that halitosis is not typically associated with erosive gastroesophageal reflux disease and the presence of esophageal mucosal damage (ERD patients). CLINICAL RELEVANCE: The data of this investigation support the findings of interdisciplinary bad breath clinics that gastroesophageal reflux disease is not a leading cause for halitosis.

Reflujo gastroesofágico en pediatría / Gastro esophageal reflux disease in pediatrics

Gastro Esophageal Reflux (GER) is the passage of gastric content to the esophagus with or without vomitus or regurgitation. GER is a physiological process that occurs in 50 percent of newborns, spontaneously resolving at 12 to 14 months of age. When this retrograde gastric content reaches the esophagus and produces uncomfortable symptoms or complications, a disease is produced, named Gastro Esophageal Reflux Disease or GERD. Reflux episodes occur due to transient relaxation of the inferior esophagic sphincter, triggered by distension of the gastric fundus. Nursing children show higher frequency of episodes of relaxation due to a higher frequency of feeding than older children do. Most frequent symptoms include frequent regurgitation, with out without vomit, weight loss or poor weight gain, irritability, pyrosis, hematemesis, dysphagia, odinophagia, sibillances, stridor, cough, dysphonia, among others. These are very inespecific symptoms. Studies for GERD include 24 H pHmeasurement, which permits the study of associatrion between one of these symptoms and reflux, as well as the study of those patients with poor response to medical treatment. Unfortunately, it does not detect non-acid reflux. Multichannel intraluminal pH impedance measurement is a relatively new exam that measures the movement of fluids, gas or solids by a change in electric impedance through the esophagus. It allows to detect small volumes, type of content, acid and non acid and correlated with symptoms of GERD. Other useful exams include endoscopy with biopsy of the esophagus for diagnosis of esophagitis, esophageal mannometry for specific cases and gastroesophagic scintigram for pulmonary aspiration. Treatment include change in lifestyle (feeding, position, habits), pharmacological treatment and surgery. Medical treatment includes antacids, PPIs, most frequently omeprazole, H2 blockers such as ranitidine have a lower rate of healing of esophagitis than omeprazole, and appears to show tachyph...

El reflujo gastroesofagico (RGE) es el paso del contenido gástrico hacia el esófago con o sin vómitos o regurgitación. El RGE es un proceso normal fisiológico que ocurre en el 50 por ciento de los lactantes, resolviéndose espontáneamente a los 12 a 14 meses de edad. Cuando este contenido retrógrado gástrico alcanza al esófago y produce síntomas molestos o complicaciones se produce la enfermedad por RGE o ERGE. Los episodios de reflujo se producen principalmente por relajaciones transitorias del esfínter esofágico inferior (LES) gatillado por distensión del fondo gástrico. Los lactantes presentan mayor numero de episodios de relajación del LES debido a que se alimentan con más frecuencia que los niños mayores. Los síntomas más frecuentes asociados con reflujo patológico son regurgitaciones frecuentes con o sin vómitos, pérdida de peso o pobre ganancia de peso, irritabilidad, pirosis, hematemesis, disfagia, odinofagia, sibilancias, estridor, tos, disfonía entre otros, estos síntomas son poco específicos en lactantes y niños menores. Los exámenes para el estudio de ERGE son la pH metría de 24 hrs que permite estudiar la asociación entre un síntoma y el reflujo, también es útil para estudiar aquellos pacientes con mala respuesta al tratamiento médico, sin embargo, tiene el inconveniente que no detecta episodios de reflujo no ácidos. La pH-Impedanciometria Intraluminal multicanal (pH IIM) es un examen relativamente nuevo mide los movimientos de fluidos, gas o sólidos a través de cambios en la impe-dancia eléctrica a lo largo del esófago; permite distinguir pequeños volúmenes refluidos y el tipo de contenido, detecta reflujo acido y no acido y correlaciona síntomas con ERGE. Otros exámenes útiles son la endoscopia con biopsia de esófago para estudio de esofagitis. La Manometría esofágica tiene sus indicaciones específicas y la Cintigrafía gastroesofágica que es otro examen que se utiliza principalmente para estudiar aspiración pulmonar. El tratamiento incluye cambi...

Supplementation of Los Angeles classification with esophageal mucosa index of hemoglobin can predict the treatment response of erosive reflux esophagitis.

BACKGROUND: We assessed whether the esophageal mucosa index of hemoglobin (IHb) could assist the Los Angeles (LA) classification in defining the severity of erosive reflux esophagitis (RE) and predicting the treatment response by esomeprazole. METHODS: Five hundred twenty-four subjects (424 RE and 100 controls) with normal body mass index and hemoglobin had undergone endoscopy to confirm the RE grade by LA classification and to check the series of IHb values at every centimeter of the esophageal mucosa while withdrawing the endoscope to above the esophageal-gastric junction (EGJ). The RE cases had received esomeprazole for 8 weeks (40 mg/day) to assess the cumulative proportions of sustained symptomatic response (SSR). RESULTS: The IHb value at the EGJ was higher in RE patients than in controls (P < 0.001). Selecting 70 as the cutoff IHb value at the EGJ, the efficacy to define RE achieved 95.8% (406/424) sensitivity and 94% (94/100) specificity. For the patients with same the LA grade, the length of IHb value >70 above the EGJ (L-IHb70) that is greater than 4 cm correlated with a poor cumulative rate of SSR (P < 0.01). CONCLUSION: The IHb value >70 at the EGJ is a reliable indicator of RE. The L-IHb70 can serve as a supplementary indicator to predict the response to esomeprazole index within the same LA grade.

Reflux esophagitis and columnar-lined esophagus after cervical esophagogastrostomy (following esophagectomy).

Reflux esophagitis (RE) and columnar-lined esophagus (CLE) are frequently observed after esophagectomy. The incidence of these conditions according to time and to the route of esophageal reconstruction after esophagectomy remains unknown. The aim of this study was to clarify any changes and differences of the incidence of RE and CLE in patients who underwent gastric tube reconstruction after esophagectomy. A hundred patients who underwent cervical esophagogastrostomy after resection of the thoracic esophagus were included in this study. We reviewed their endoscopic findings at 1 month, at 1 year and at 2 years after surgery, and compared the incidence rates of RE and CLE with the passage of time and among the three reconstruction routes; a subcutaneous route, a retrosternal route, and a posterior mediastinal route. The incidence rate of RE was 42%, 37% and 38%, at 1 month, 1 year and at 2 years after surgery, respectively. There was no significant difference in the incidence of RE according to the time after surgery. The incidence rate of severe RE (Grade C and D in the Los Angeles Classification) was 9% percent at 1 month after surgery, 18% at 1 year after surgery and 22% at 2 years after surgery, significantly increasing with passage of time. The incidence rate of CLE was 0% at 1 month after surgery, 14% at 1 year after surgery and 40% at 2 years after surgery, significantly increasing with passage of time. No difference was observed in the incidence of RE and that of CLE among the three routes of esophageal reconstruction. Severe RE and CLE increase with passage of time after cervical esophagogastrostomy. Therefore, careful endoscopic follow-up is necessary for such patients irrespective of the route of esophageal reconstruction.

[Establishment of reflux esophagitis models in rats].

OBJECTIVE: To establish animal models of reflux esophagitis in rats. METHODS: Seventy male Sprague Dawley rats aged 8 weeks were randomly divided into 4 groups: in Group A (n=20) esophagojejunostomy was performed to induce a gastro-jejuno-esophageal reflux; in Group B (n=20) esophagoduodenostomy was performed to induce a gastro-duodeno-esophageal reflux; in Group C (n=20) total gastrectomy plus esophagojejunostomy was performed to induce a jejuno-esophageal reflux; in Group D (n=10) only was performed sham operation (control). RESULT: Among 70 rats, 6 died in Group A, 7 died in Group B, 6 died in Group C, and 72.9 %(51/70) animals were completed in the study. After 12 weeks the incidence of esophageal inflammation was 100.0%; in Groups A, B and C erosion occurred in 11/14 (78.6%), 10/13 (76.9%), 3/14 (21.4%) of animals, respectively; squamous dysplasia was in 10/14 (71.4%), 10/13 (76.9%), 5/14 (35.7%) of rats, respectively; Barrett's esophagus was in 6/14 (42.9%), 5/13 (38.5%), 1/14 (7.1%), respectively. One esophageal adenocarcinoma was found in Group A; no histological changes were observed in Group D. CONCLUSION: The animal models of reflux esophagitis can be induced by esophagojejunostomy, esophagoduodenostomy or total gastrectomy plus esophago-jejunostomy in rats; and the former two surgical modalities are better than the later.

Interobserver agreement in endoscopic evaluation of reflux esophagitis using a modified Los Angeles classification incorporating grades N and M: a validation study in a cohort of Japanese endoscopists.

The Los Angeles classification system is the most widely employed criteria associated with the greatest interobserver agreement among endoscopists. In Japan, the Los Angeles classification system has been modified (modified LA system) to include minimal changes as a distinct grade of reflux esophagitis, rather than as auxiliary findings. This adds a further grading M defined as minimal changes to the mucosa, such as erythema and/or whitish turbidity. The modified LA system has come to be used widely in Japan. However, there have been few reports to date that have evaluated the interobserver agreement in diagnosis when using the modified LA classification system incorporating these minimal changes as an additional grade. A total of 100 endoscopists from university hospitals and community hospitals, as well as private practices in the Osaka-Kobe area participated in the study. A total of 30 video clips of 30-40 seconds duration, mostly showing the esophagocardiac junction, were created and shown to 100 endoscopists using a video projector. The participating endoscopists completed a questionnaire regarding their clinical experience and rated the reflux esophagitis as shown in the video clips using the modified LA classification system. Agreement was assessed employing kappa (kappa) statistics for multiple raters. The kappa-value for all 91 endoscopists was 0.094, with a standard error of 0.002, indicating poor interobserver agreement. The endoscopists showed the best agreement on diagnosing grade A esophagitis (0.167), and the poorest agreement when diagnosing grade M esophagitis (0.033). The kappa-values for the diagnoses of grades N, M, and A esophagitis on identical video pairs were 0.275-0.315, with a standard error of 0.083-0.091, indicating fair intraobserver reproducibility among the endoscopists. The study results consistently indicate poor agreement regarding diagnoses as well as fair reproducibility of these diagnoses by endoscopists using the modified LA classification system, regardless of age, type of practice, past endoscopic experience, or current workload. However, grade M reflux esophagitis may not necessarily be irrelevant, as it may suggest an early form of reflux disease or an entirely new form of reflux esophagitis. Further research is required to elucidate the pathophysiological basis of minimal change esophagitis.

The frequency of histological features mimicking reflux esophagitis: a study in non-human primates.

BACKGROUND: The frequency of histological changes mimicking those described for reflux esophagitis in humans was assessed in a cohort of non-human primates (NHP). MATERIALS AND METHODS: A total of 121 consecutive esophagi (from 103 baboons and 18 macaques) were classified according to Ismail-Beiji for reflux esophagitis in humans into grade 1, grade 2 and grade 3 esophagitis. RESULTS: Histological features compatible with reflux esophagitis were found in 28.2% of the baboons and in 22.2% of the macaques. Esophagitis grade 1 was more common in baboons (24%) than in macaques (6%), while esophagitis grade 2 was more common in macaques (17%) than in baboons (2%). CONCLUSION: Although the prevalence of reflux esophagitis in man is at least 2%, only a fraction of patients demonstrate histological features consistent with grades 1, 2 or 3 esophagitis. Hence, the finding that 27% of a cohort of consecutive, unselected NHP had grades 1, 2 or 3 esophagitis at histology is remarkable. The possible causes for the difference between species, such as the oblique position often adopted by NHP during the gastric phase of digestion, the diet, regurgitation and subsequent re-ingestion, as well as the stress of NHP when kept in captivity, are reviewed.

Dysphagia in adult Japanese is not equivalent to the grade of endoscopic reflux esophagitis.

OBJECTIVE: This study was aimed to evaluate the correlation between dysphagia, detected by nursing staff in a brief interview and endoscopic findings in reflux esophagitis. PATIENTS AND METHODS: A total of 8,031 Japanese subjects without medication for gastrointestinal disease were briefly asked about the presence of heartburn, dysphagia, odynophagia, and acid regurgitation by nursing staff before endoscopy for assessment of esophagitis utilizing the Los Angeles Classification. RESULTS: The grade of endoscopic esophagitis was not equivalent to symptoms of dysphagia in 8,031 subjects. We evaluated the characteristics of subjects who complained of only dysphagia. Univariate analysis indicated that non-smoking, and non-drinking females were associated with a higher risk for dysphagia, and multivariate analysis indicated the gender was associated with dysphagia. There was no association of dysphagia with herniation and distribution of age. CONCLUSION: This study indicated that dysphagia was not equivalent to the endoscopic findings according to a brief interview by nursing staff and that dysphagia might be more common in females and those who do not smoke or drink.

Prediction of recurrence after laparoscopic fundoplication for erosive reflux esophagitis based on anatomy-function-pathology (AFP) classification.

BACKGROUND: The usefulness of the anatomy-function-pathology (AFP) score was examined to evaluate its prediction of recurrence after laparoscopic fundoplication for erosive reflux esophagitis. METHODS: Of the patients undergoing laparoscopic fundoplication for erosive reflux esophagitis of Los Angeles classification grade A or higher from December 1994 to December 2004, 107 who underwent preoperative barium esophagogram, pH monitoring, and endoscopy were selected as subjects. The AFP score was calculated by A, F, and P factor grades of the AFP classification. By comparing patients with and without recurrence, the usefulness of the AFP score for predicting recurrence was examined. RESULTS: Reflux esophagitis recurred in seven patients. No significant difference in age, sex, or A or F factor was observed between the groups, whereas a significant difference was observed in the P factor (p = 0.008). On the other hand, the mean AFP score in the recurrence group was 16.9 +/- 5.3, whereas that in the nonrecurrence group was 8.9 +/- 5.3 (p = 0.0021). Among the patients with a score of 17 points or more (n = 23), recurrence was found in 6 patients (26%). On the other hand, among the patients with a score lower than 17 points (n = 84), recurrence was found in 1 patient, but not in the remaining 83 patients (1%). Sensitivity was thus 85.7% (95% confidence interval [CI], 42.1-99.6), and specificity was 83% (95% CI, 74.2-89.8). The positive predictive value was 26.1% (95% CI, 10.2-48.4), and the negative predictive value was 98.8% (95% CI, 93.5-99.9). Multiple logistic regression analysis was performed, and receiver operating characteristics curves were obtained. The area under the curve for the AFP score was 0.8457, whereas that for the P factor was 0.7907 (p = 0.0045), suggesting that the AFP score may more accurately predict recurrence than the P factor. CONCLUSION: The AFP score may be useful for predicting postoperative recurrence. If surgery is performed when the AFP score is lower than 17 points, the likelihood of postoperative recurrence is expected to be very low.

Presenting symptoms of nonerosive and erosive esophagitis in pediatric patients.

Children and adolescents with symptomatic gastroesophageal reflux disease (GERD) and erosive esophagitis (EE) of grade >/=2 (n=45) or nonerosive esophagitis (NEE) (n=45) were assessed to determine the relationship between presenting symptoms, esophagitis severity, and patient age. Overall, regurgitation/vomiting, abdominal pain, and cough were the most frequent symptoms. The prevalence and severity of anorexia/feed refusal was significantly greater in EE versus NEE children; this symptom was also significantly more prevalent in younger (1-5 years) children (both NEE and EE groups) compared to older children. Cough was significantly less severe in NEE adolescents than in younger children. Cough, anorexia/feed refusal, and regurgitation/vomiting were more severe and heartburn was less severe in EE children aged 1-5 years compared with older patients. In conclusion, GERD in children manifests differently than that in adults and symptoms vary with patient age. Symptoms were not predictive of presence or lack of mucosal damage.

Minimal changes in reflux esophagitis: red ones and white ones.

Minimal change esophagitis is commonly accepted as part of the spectrum of reflux esophagitis in Japan as well as in many reflux esophagitis classification systems. However, the Los Angeles system excludes minimal changes as a sign of reflux esophagitis because of low interobserver agreement. The high prevalence of minimal change esophagitis suggests that many endoscopists can recognize such findings in their patients' esophagi. However, we do not have a clear definition of minimal changes, which requires proven interobserver agreement, histological evidence, and response data to therapeutic intervention. Furthermore, erythematous changes (red ones) and acanthotic changes (white ones) are not distinguished in the definition of minimal change used in Japan. It is time to clarify such issues.

Comparison of interobserver agreement for different scoring systems for reflux esophagitis: Impact of level of experience.

BACKGROUND: The Savary-Miller, the Los Angeles, and the MUSE (metaplasia, ulcer, stricture, erosion) scoring systems have been developed to assess esophageal lesions related to GERD. Interobserver agreement for these systems was compared, with particular reference to the experience of the endoscopist. METHODS: By using videoendoscopes, videotapes were made of the gastroesophageal junction of 60 patients who presented with symptoms suggestive of GERD. The Savary-Miller, the Los Angeles, and the MUSE systems were used to score all video clips by 9 endoscopists who were subgrouped by level of experience (3 levels, 3 endoscopists per level). Agreement was assessed by using weighted kappa statistics (kappa). RESULTS: The Savary-Miller scoring system revealed moderate agreement for the experienced group (kappa=0.41) but performed poorly when applied by inexperienced raters (kappa=0.16). The Los Angeles system was most reproducible in all subgroups, irrespective of the level of experience (kappa=0.49 to 0.65). The MUSE scoring system was highly similar to the Los Angeles scoring system with respect to erosions and, in addition, allowed assessment of complications of GERD. CONCLUSIONS: The Los Angeles and the MUSE scoring systems are most reliable for the assessment of erosions caused by GERD. Because of low reliability, use of the Savary-Miller scoring system is not recommended. For all scoring systems, interobserver agreement varies with the level of experience in the performance of upper endoscopy.