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Research ArticleArticle

Prevalence, Correlates and Outcomes of Gastric Antral Vascular Ectasia in Systemic Sclerosis: A EUSTAR Case-control Study

Etienne Ghrénassia, Jérome Avouac, Dinesh Khanna, Chris T. Derk, Oliver Distler, Yossra Atef Suliman, Paolo Airo, Patricia E. Carreira, Rosario Foti, Brigitte Granel, Alice Berezne, Jean Cabane, Francesca Ingegnoli, Edoardo Rosato, Paola Caramaschi, Roger Hesselstrand, Ulrich A. Walker, Juan Jose Alegre-Sancho, Virginie Zarrouk, Christian Agard, Valeria Riccieri, Elena Schiopu, Heather Gladue, Virginia D. Steen and Yannick Allanore
The Journal of Rheumatology January 2014, 41 (1) 99-105; DOI: https://doi.org/10.3899/jrheum.130386
Etienne Ghrénassia
From the Department of Rheumatology A, Paris Descartes University, Cochin Hospital, AP-HP, Paris, France; University of Michigan Scleroderma Program, Ann Arbor, Michigan, USA; Division of Rheumatology, University of Pennsylvania, Philadelphia, USA; Department of Rheumatology, University Hospital Zurich, Switzerland; Rheumatology and Clinical Immunology Unit, Spedali Civili and University of Brescia, Brescia, Italy; Rheumatology Department, Hospital Universitario 12 de Octubre, Madrid, Spain; Rheumatology Unit, Azienda Ospedaliera Universitaria V. Emanuele, Ferrarotto, S. Bambino, Catania, Italy; Service de Médecine Interne, Centre Hospitalier Nord, Marseille, France; Service de Médecine Interne, University Hospital Centre (CHU) Cochin; Service de Médecine Interne, CHU Saint-Antoine, Paris, France; Division of Rheumatology, Istituto Gaetano Pini, University of Milan, Italy; Department of Clinical Medicine, Clinical Immunology Unit, Sapienza University of Rome, Rome, Italy; Rheumatology Unit, Azienda Ospedaliera Universitaria Integrata, Verona, Italia; Department of Rheumatology, Lund University, Lund, Sweden; Department of Rheumatology, Basel University, Basel, Switzerland; Sección de Reumatología, Hospital Dr Peset, Valencia, Spain; Médecine interne, Hôpital Beaujon, Clichy, France; Internal Medicine, Hôtel-Dieu Hospital, CHU Nantes, Nantes, France; Rheumatologic Unit, Department of Internal Medicine and Clinical Specialties, Sapienza University of Rome, Rome, Italy; and Department of Medicine, Georgetown University Medical Center, Washington DC, USA.
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Jérome Avouac
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Dinesh Khanna
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Chris T. Derk
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Oliver Distler
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Yossra Atef Suliman
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Paolo Airo
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Patricia E. Carreira
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Rosario Foti
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Brigitte Granel
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Alice Berezne
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Jean Cabane
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Francesca Ingegnoli
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Edoardo Rosato
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Paola Caramaschi
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Roger Hesselstrand
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Ulrich A. Walker
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Juan Jose Alegre-Sancho
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Virginie Zarrouk
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Christian Agard
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Valeria Riccieri
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Elena Schiopu
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Heather Gladue
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Virginia D. Steen
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Yannick Allanore
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  • For correspondence: yannick.allanore@cch.aphp.fr
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Abstract

Objective. To estimate the prevalence, determine the subgroups at risk, and the outcomes of patients with systemic sclerosis (SSc) and gastric antral vascular ectasia (GAVE).

Methods. We queried the European League Against Rheumatism Scleroderma Trials and Research (EUSTAR) network for the recruitment of patients with SSc-GAVE. Each case was matched for cutaneous subset and disease duration with 2 controls with SSc recruited from the same center, evaluated at the time the index case made the diagnosis of GAVE. SSc characteristics were recorded at the time GAVE occurred and the last observation was collected to define the outcomes.

Results. Forty-nine patients with SSc and GAVE were included (24 with diffuse cutaneous SSc) and compared to 93 controls with SSc. The prevalence of GAVE was estimated at about 1% of patients with SSc. By multivariate analysis, patients with SSc-GAVE more frequently exhibited a diminished (< 75%) DLCO value (OR 12.8; 95% CI 1.9–82.8) despite less frequent pulmonary fibrosis (OR 0.2; 95% CI 0.1–0.6). GAVE was also associated with the presence of anti-RNA-polymerase III antibodies (OR 4.6; 95% CI 1.2–21.1). SSc-GAVE was associated with anemia (82%) requiring blood transfusion (45%). Therapeutic endoscopic procedures were performed in 45% of patients with GAVE. After a median followup of 30 months (range 1–113 months), survival was similar in patients with SSc-GAVE compared to controls, but a higher number of scleroderma renal crisis cases occurred (12% vs 2%; p = 0.01).

Conclusion. GAVE is rare and associated with a vascular phenotype, including anti-RNA-polymerase III antibodies, and a high risk of renal crisis. Anemia, usually requiring blood transfusions, is a common complication.

Key Indexing Terms:
  • SYSTEMIC SCLEROSIS
  • WATERMELON STOMACH
  • GAVE
  • RNA POLYMERASE III
  • SCLERODERMA RENAL CRISIS

Watermelon stomach or gastric antral vascular ectasia (GAVE) is a rare event known to be associated with liver diseases and is thought to occur in about 2% of patients awaiting liver transplantation1. GAVE has a unique endoscopic appearance, characterized by multiple longitudinal stripes of red vessels, which radiate in a spoke-like fashion from the pylorus to the antrum. This characteristic appearance is reminiscent of the stripes of a watermelon, thus accounting for the term “watermelon stomach.” The microscopic aspect is defined by dilatation of mucosal capillaries, focal fibrin thrombosis, fibromuscular hyperplasia, and fibrohyalinosis2,3.

GAVE can also be observed in patients in nonhepatic chronic diseases such as autoimmune connective tissue disorders4, bone marrow transplantation, chronic renal failure, and heart diseases. In systemic sclerosis (SSc), GAVE is a complication thought to belong to the spectrum of vascular alterations5. Despite the frequent use of gastroscopy, the prevalence of SSc-GAVE remains poorly known, with estimates reported to vary largely in the literature (from 1.8% to 22.3%)6,7,8,9. Because of the rarity of this disease manifestation, the clinical phenotype of patients with SSc-GAVE has not been well studied, although a variety of clinical associations have been reported5,6,10. In addition, the prognosis of GAVE still remains a matter of debate. The aim of our study was to clarify prevalence, SSc-associated features, and prognosis of GAVE, taking advantage of the large European League Against Rheumatism Scleroderma Trial and Research (EUSTAR) network.

MATERIALS AND METHODS

We queried the EUSTAR centers (182 centers worldwide) by e-mail for patients with SSc and a diagnosis of GAVE. We asked the centers that had at least 1 case identified to complete a dedicated data collection instrument and to provide disease characteristics according to the EUSTAR Minimal Essential Data Set (MEDS) online format11,12. This dedicated data collection instrument covered demographics, disease duration (first non-Raynaud symptom), organ involvement, and laboratory data of SSc, plus clinical presentation, treatment, and followup.

To estimate the point prevalence of symptomatic GAVE, we asked each participating center to provide the number of patients followed who had SSc. To further clarify the phenotype and outcomes, we asked each of the participating centers to match 2 patients with SSc seen at their center at the time of diagnosis of SSc-GAVE index case (± 12 months) for cutaneous subset and disease duration, as we did in a previous EUSTAR study13. The same disease characteristics as for the GAVE cases were collected according to MEDS online.

Our study was approved by the clinical research committee of EUSTAR and approved by all local ethics committees.

Computer software (MedCalc, version 11.4.4; MedCalc Software bvba) was used for statistical analyses. Continuous values were reported as median (range). Continuous variables were compared with the Mann-Whitney U test. Categorical variables were reported as absolute number or percentage. Categorical variables were compared using the chi-square test, or Fisher’s exact test, as appropriate. OR with their 95% CI were calculated. Multivariate analysis was performed using stepwise logistic regression with backward elimination, which involves starting with all candidate variables, testing the deletion of each variable using a chosen model comparison criterion, deleting the variable (if any) that improves the model the most by being deleted, and repeating this process until no further improvement is possible. To be as inclusive as possible, and not to miss an important variable independently associated with GAVE, all variables with a univariate p value ≤ 0.1 were entered as covariates in the stepwise regression analysis. For all study variables, 2-tailed p values < 0.05 were considered statistically significant.

RESULTS

Among 20 participating centers, we identified 49 patients with SSc-GAVE, with a diagnosis made by upper gastrointestinal (GI) endoscopy in all cases. The number of cases sent per center ranged from 1 to 7. According to the estimated number of symptomatic patients followed by the participating centers, the estimated point prevalence was 1% (39/4090 patients). This prevalence did not take into account 6 asymptomatic patients with GAVE and 4 additional patients for whom the total number of patients with SSc followed in their center was missing. The prevalence ranged between 0.4% and 5% among the different centers.

Ninety percent of the patients with SSc-GAVE were females with a median age of 56 years (range 20–83 yrs). Twenty-four patients (49%) had the diffuse cutaneous subset (dcSSc) and 25 (51%) had the limited subset (lcSSc). The median delay between the first non-Raynaud symptom and the diagnosis of GAVE was 19 months (range 0–180 mos). It was 13 months (range 0–180 mos) in patients with dcSSc and 24 months (range 0–114 mos) in patients with lcSSc (p = 0.63). The median delay between Raynaud and the diagnosis of GAVE was 38 months (range 0–396 mos). It was 16 months (range 0–192 mos) in patients with dcSSc and 60.5 months (range 0–396 mos), in patients with lcSSc (p = 0.18).

Patients with SSc-GAVE were matched with 93 controls (5 controls were missing because 3 centers could not provide 2 expected matched controls per case). Thus, GAVE and control groups were similar for the median disease duration (19 mos vs 14 mos; p = 0.2) and proportions of cutaneous subsets (49% diffuse cutaneous in the GAVE patients vs 47% diffuse cutaneous in the matched controls; p = 0.9).

We first determined factors associated with the presence of GAVE by univariate analyses. As illustrated in Table 1, patients with SSc-GAVE were significantly more likely to have systemic hypertension (45% vs 15%; p = 0.0002) and reduced CO diffusion [DLCO/alveolar volume (AV) < 75% predicted in 51% vs 27%; p = 0.008], despite less lung fibrosis on thoracic computed tomography (CT) scan (22% vs 44%; p = 0.02), defined by the presence of at least 1 usual sign of SSc-associated lung fibrosis, i.e., interstitial reticular pattern with or without traction bronchiectasis, and/or honeycomb cysts14,15. Of note, the capillaroscopic patterns were similar between the 2 groups16. In addition, there was no association with other disorders suspected to be associated with GAVE, including cardiac, liver, renal insufficiency, pernicious anemia, primary biliary cirrhosis, and thyroiditis.

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Table 1.

Comparison of clinical features between patients with systemic sclerosis (SSc) and gastric antral vascular ectasia (GAVE) and control patients with SSc in univariate analysis.

Because cases and controls were matched for the cutaneous subset, there was, as expected, no difference in anticentromere antibody status between the 2 groups. However, despite the fact that 51% of patients with SSc-GAVE had the diffuse cutaneous subset, it is striking that only 1 of them had antitopoisomerase I (anti-topo I) antibodies, while 35% of controls were anti-topo I positive (p < 0.0001). The other main finding was the higher prevalence of anti-RNA polymerase III in patients with SSc-GAVE (48% vs 16%; p = 0.01; Table 2).

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Table 2.

Comparison of antibody status between patients with systemic sclerosis (SSc) and gastric antral vascular ectasia (GAVE) and control patients with SSc in univariate analysis.

We also compared the clinical characteristics of patients regarding the RNA polymerase III status. Patients with anti-RNA polymerase III antibodies were more likely to have significantly shorter disease duration (p = 0.03) and significantly higher proportion of GAVE (p = 0.01) and scleroderma renal crisis (p = 0.02; Table 3).

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Table 3.

Patient characteristics according to anti-RNA polymerase III antibody status.

In multivariate analyses (Table 4), we identified the following factors that were independently associated with GAVE: a reduced frequency of lung fibrosis on chest CT scan (OR 0.2; 95% CI 0.1–0.6), reduced DLCO/AV < 75% predicted (OR 12.8; 95% CI 1.9–82.8) and positive anti-RNA-polymerase III antibodies (OR 4.6; 95% CI 1.2–21.1).

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Table 4.

Comparison of clinical and immunological items between patients with systemic sclerosis (SSc) and gastric antral vascular ectasia (GAVE) and control patients with SSc using multivariate analysis (stepwise logistic regression including disease characteristics with a univariate p ≤ 0.1).

Among the 49 patients with SSc-GAVE, 6 (12%) were asymptomatic and identified by systematic gastroscopy assessment. The main symptoms and clinical presentation of GAVE were anemia in 40 patients (82%), upper GI bleeding in 5 (10%), and lower GI bleeding in 2 (4%). Twenty-two patients with SSc-GAVE (45%) needed blood transfusions of a mean of 2 units of packed red cells. Among them, 4 were transfused with more than 10 units of packed red cells. Twenty-eight patients (57%) required a therapeutic endoscopic procedure, with argon plasma coagulation (63%) or laser yttrium aluminum garnet (YAG; 30%) in most cases. Two patients (4%) requested gastric hemostatic surgery. After a median followup of 30 months (range 1–113 mos), 17 patients (35%) had a relapse of bleeding requiring new local endoscopic treatment. Eight needed new red blood cell transfusions. There were 6 deaths from any cause (12%) in the SSc-GAVE group and 6 deaths (6.2%) in the SSc-control group (p = 0.45). Of the most interest, 6 cases (12%) of scleroderma renal crisis in the SSc-GAVE group occurred during the followup period, compared to 2 cases (2%) in the control group (p = 0.01). Of note, 3 of the 6 patients with GAVE and 1 of the 2 controls who developed scleroderma renal crisis had positive anti-RNA polymerase III antibodies.

DISCUSSION

This study is the largest series of GAVE in patients with SSc. It reflects the experience of a large number of participating centers and was not influenced by only a few of them (the number of cases sent per center ranged from 1 to 7). Nevertheless, despite querying a large network we were only able to assemble a series of 49 cases, which provides an estimated prevalence of symptomatic GAVE at about 1%. This frequency is consistent with the identification of 2/110 patients (2%) with GAVE in a previous study that performed a systematic endoscopic assessment for the risk of Barret esophagus17. However, this prevalence is much lower than in some previous series. Indeed, a recent study showed a prevalence of 22.3% of GAVE in patients with severe early diffuse SSc recruited in a trial of autologous stem cell transplantation (Scleroderma Cyclophosphamide Or Transplant, SCOT, trial), where all patients regardless of clinical symptoms were assessed by using systematic upper GI endoscopy9. The inclusion of unselected patients with SSc, reflecting routine care and current practice, the retrospective collection of data, and the absence of systematic endoscopic assessment for all EUSTAR patients, leading to missed GAVE cases, may also account for the lower prevalence of GAVE in our sample.

Only a systematic endoscopic evaluation, which was beyond the scope of our study, could give the real prevalence of GAVE in patients with SSc. In addition, GAVE is sometimes difficult to recognize endoscopically, and thus may be missed or misdiagnosed by routine endoscopy. This was highlighted by a study that identified with the use of videocapsule 6/128 patients (4.7%) with GAVE missed by routine endoscopy18. However, the use of videocapsule remains a matter of debate in SSc because of potential safety issues.

The diagnosis of GAVE was made 19 months after the diagnosis of SSc, in line with 2 previous studies that reported a median duration of 10 (range 6–168) and 36 (range 2–124) months6,10. Therefore, it seems to be an early complication, which might even occur earlier in patients with diffuse SSc10. It is noteworthy that GAVE was the first non-Raynaud event in 15 of our cases (30.6%), consistently with data previously reported6. Several conditions, related or not to SSc, have also been suggested to be associated with GAVE, including cardiac, liver, renal insufficiency, pernicious anemia, primary biliary cirrhosis, and thyroiditis4,19, but we could not confirm these findings.

In the general population, vasodilating and angiogenic mediators; other humoral factors, such as vasoactive intestinal peptide; mechanical stress; and abnormal antral motility are associated with the presence of GAVE20. In SSc, GAVE is thought to be part of generalized microangiopathy that includes major disturbances of vascular mediators21. Indeed, similar histopathologic lesions can be found both in dermis and GAVE in SSc, such as capillary dilatation, small vessel fibrin deposition, and microthrombosis5. Further, some authors reported lesions in other locations in SSc, such as rectal vascular ectasia22. Herein, we provide some evidence of the link between GAVE and vasculopathy, by identifying several factors related to SSc-associated vasculopathy associated with GAVE, including renal crisis, systemic hypertension, and reduced DLCO/AV.

We did not observe associated digestive comorbidities and, although previous reports suggested that cutaneous vascular lesions might be associated with GAVE, we could not evaluate cutaneous telangiectasia, because we were limited by missing data to perform a quantitative or semiquantitative approach to assess this vascular feature6,10.

Antinuclear antibodies (ANA) are found in over 90% of patients with SSc. Further, the presence of autoantibodies and their specificity is associated with disease progression and outcomes23. Positivity for 1 type of ANA usually remains throughout the course of the disease, and each subtype is usually exclusive of the others24. Our results highlight the scarcity of anti-topo I in patients with GAVE, which confirms previously reported data that showed a very low prevalence of anti-topo I antibodies among patients with GAVE, despite the high prevalence of the diffuse cutaneous form5,6,10. Indeed, Watson, et al5 and Marie, et al6 reported no patient with anti-topo I antibody out of 5 and 15 patients, respectively, and Ingraham, et al reported only 1 positive patient out of 2810. In the SCOT trial, a trend was also observed for decreased frequency of topoisomerase antibodies in patients with GAVE (18.8% vs 44.7%; p = 0.071).

Of the most interest, positive anti-RNA polymerase III antibodies were independently associated with GAVE in our study sample, consistent with previous reports25. Moreover, the systematic followup of patients with GAVE allowed the identification of a higher risk of renal crisis in this patient subset, which is the master established risk of anti-RNA polymerase III antibodies. These data are in accordance with those of Ingraham, et al10 and Marie, et al6, who reported an unexpected high risk of renal crisis (14% and 20%, respectively) in their series. This further underlines the relationships between GAVE and anti-RNA polymerase III. Then, the presence of anti-RNA polymerase III seems to be a risk factor for several vascular events, such as GAVE, renal involvement, and also vascular lung or heart involvement, as suggested by the low DLCO/VA despite the absence of infiltrative lung disease. However, no association was observed between anti-RNA polymerase III and GAVE in the SCOT trial9; this might be explained by a selection bias, because our study included only patients with severe diffuse SSc. It is noteworthy that RNA polymerase III antibodies were not available from all patients in our cohort, because the detection of these antibodies is not yet performed in routine care in all the EUSTAR centers. The distribution of missing data regarding RNA polymerase III antibodies was similar between cases and controls, supporting that these antibodies were not obtained to specifically confirm their association with GAVE. Moreover, disease duration and cutaneous subset were not statistically different between patients with RNA polymerase III antibody information and patients without, supporting the absence of major ascertainment bias for obtaining RNA polymerase III information.

Very few series have looked at the clinical presentation of SSc-GAVE. In our series, a large proportion of patients (88%) had clinically significant bleeding with anemia, often requesting red blood cell transfusions. Accordingly, intervention therapies were used in half the patients. Argon plasma and Nd-YAG laser were the most frequently used, with good efficiency, although there was 35% relapse and request for new endoscopic intervention and sometimes new transfusions. Indeed, treatment of GAVE is known to be led by hemostatic endoscopic procedures. Argon plasma seems to be the first choice because it has been the most reported in GAVE, has shown a high efficacy (80% to 100%) with 2–4 sessions26,27, and has the lowest morbidity18. Nd-YAG laser can also be a useful treatment with 50% to 80% success rates reported17. However, relapses can occur and then treatment needs to be repeated. Cryotherapy and use of banding in the stomach antrum have also been tested in GAVE. Hemostatic surgery such as antrectomy is effective with no recurrence of bleeding, but a postoperative mortality rate of 6.6% was reported28. Various other therapies were used, including repeated blood transfusion, estrogen-progesterone treatment, octreotide, and steroids, but there is today no confirmation study in large populations17. In SSc-GAVE refractory disease, some case reports suggested that cyclophosphamide could be helpful29,30, but this remains to be evaluated.

The followup of patients with SSc-GAVE did not reach difference with controls in terms of mortality within the limited followup. However, we observed recurrences of bleeding and the development of renal crisis in patients with GAVE, demonstrating its severity in terms of morbidity. A longer followup of a larger number of patients is required to better evaluate the potential effect of GAVE on mortality.

GAVE is an infrequent complication of SSc commonly revealed by GI bleeding. Patients with SSc and iron deficiency, anemia, or GI bleeding should be strongly considered for GAVE. Thereafter, endoscopy should be accurately performed to make the right diagnosis and decide whether local therapy is needed. Patients with SSc and positive anti-RNA polymerase III are at high risk of GAVE, such as scleroderma renal crisis, which seems to belong to the same SSc vascular spectrum.

Footnotes

  • Dr. Khanna was supported by US National Institutes of Health/US National Institute of Arthritis and Musculoskeletal and Skin Diseases K24 AR063120.

  • Accepted for publication September 12, 2013.

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Vol. 41, Issue 1
1 Jan 2014
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Prevalence, Correlates and Outcomes of Gastric Antral Vascular Ectasia in Systemic Sclerosis: A EUSTAR Case-control Study
Etienne Ghrénassia, Jérome Avouac, Dinesh Khanna, Chris T. Derk, Oliver Distler, Yossra Atef Suliman, Paolo Airo, Patricia E. Carreira, Rosario Foti, Brigitte Granel, Alice Berezne, Jean Cabane, Francesca Ingegnoli, Edoardo Rosato, Paola Caramaschi, Roger Hesselstrand, Ulrich A. Walker, Juan Jose Alegre-Sancho, Virginie Zarrouk, Christian Agard, Valeria Riccieri, Elena Schiopu, Heather Gladue, Virginia D. Steen, Yannick Allanore
The Journal of Rheumatology Jan 2014, 41 (1) 99-105; DOI: 10.3899/jrheum.130386

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Prevalence, Correlates and Outcomes of Gastric Antral Vascular Ectasia in Systemic Sclerosis: A EUSTAR Case-control Study
Etienne Ghrénassia, Jérome Avouac, Dinesh Khanna, Chris T. Derk, Oliver Distler, Yossra Atef Suliman, Paolo Airo, Patricia E. Carreira, Rosario Foti, Brigitte Granel, Alice Berezne, Jean Cabane, Francesca Ingegnoli, Edoardo Rosato, Paola Caramaschi, Roger Hesselstrand, Ulrich A. Walker, Juan Jose Alegre-Sancho, Virginie Zarrouk, Christian Agard, Valeria Riccieri, Elena Schiopu, Heather Gladue, Virginia D. Steen, Yannick Allanore
The Journal of Rheumatology Jan 2014, 41 (1) 99-105; DOI: 10.3899/jrheum.130386
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Keywords

SYSTEMIC SCLEROSIS
WATERMELON STOMACH
GAVE
RNA POLYMERASE III
SCLERODERMA RENAL CRISIS

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Keywords

  • systemic sclerosis
  • WATERMELON STOMACH
  • GAVE
  • RNA POLYMERASE III
  • SCLERODERMA RENAL CRISIS

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