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Sawada H, Czech T, Silangcruz K, Kozai L, Obeidat A, Wien EA, Nishimura MF, Nishikori A, Sato Y, Nishimura Y. Clinicopathological characteristics of gastric IgG4-related disease: Systematic scoping review. J Gastroenterol Hepatol 2022; 37:1865-1872. [PMID: 35949057 DOI: 10.1111/jgh.15980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 08/01/2022] [Accepted: 08/06/2022] [Indexed: 12/09/2022]
Abstract
BACKGROUND AND AIM Gastric IgG4-related disease (IgG4-RD) can mimic malignancy, submucosal tumors (SMT), and ulcers, leading to over-triage and unnecessary medical interventions such as gastrectomy. The variability in the clinicopathological presentation of IgG4-related disease is not yet well defined, posing a diagnostic challenge. METHODS Following the PRISMA Extension for Scoping Reviews, we searched MEDLINE and EMBASE for all peer-reviewed articles using keywords including "gastritis," "stomach," "gastrointestinal stromal tumor," and "IgG4-RD" from their inception to December 28, 2021. RESULTS Thirty-nine articles, including 2 observational studies and 42 cases, were included in the systematic review. While bottom-heavy lymphoplasmacytic mucosal infiltration is a characteristic finding of gastric IgG4-RD, it was only present in less than half of the patients in the observational studies. Patients with gastric IgG4-RD were more likely to be diagnosed with gastrointestinal stromal tumor (GIST), gastric cancer, or peptic ulcer disease and their clinical course involved resection (51.3%) or even gastrectomy. Diagnosis of gastric IgG4-RD was most frequently made by post-operative pathological analysis. CONCLUSION This systematic review summarizes the current understanding of the characteristics of gastric IgG4-RD. Increased awareness of gastric IgG4-RD as a differential diagnosis of gastric SMT or ulcers among clinicians is crucial in order to reduce unnecessary high-risk, invasive interventions.
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Affiliation(s)
- Haruki Sawada
- Department of Medicine, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii, USA
| | - Torrey Czech
- Department of Medicine, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii, USA
| | - Krixie Silangcruz
- Department of Medicine, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii, USA
| | - Landon Kozai
- Department of Medicine, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii, USA
| | - Adham Obeidat
- Department of Medicine, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii, USA
| | - Eric Andrew Wien
- Department of Medicine, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii, USA
| | - Midori Filiz Nishimura
- Department of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Asami Nishikori
- Division of Pathophysiology, Okayama University Graduate School of Health Sciences, Okayama, Japan
| | - Yasuharu Sato
- Division of Pathophysiology, Okayama University Graduate School of Health Sciences, Okayama, Japan
| | - Yoshito Nishimura
- Department of Medicine, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii, USA.,Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
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Uchino K, Notohara K, Uehara T, Kuraishi Y, Itakura J, Matsukawa A. Utility of gastric biopsy in diagnosing IgG4-related gastrointestinal disease. Pathol Int 2020; 71:124-134. [PMID: 33378576 DOI: 10.1111/pin.13059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 11/27/2020] [Accepted: 11/30/2020] [Indexed: 01/13/2023]
Abstract
The utility of gastric biopsy for diagnosing immunoglobulin (Ig)G4-related gastrointestinal disease (IgG4-GID) remains unclear. Bottom-heavy plasmacytosis (BHP) is a distinct feature of IgG4-GID. To clarify the feasibility of using gastric biopsies to diagnose BHP in IgG4-GID, we analyzed the histological features and immunostaining of gastric biopsy specimens from 31 known IgG4-related disease (IgG4-RD) patients and we assessed the presence of BHP in 1696 consecutive routine gastric biopsies. Cases with both >10 IgG4-positive plasma cells per high-power field and an IgG4/IgG-positive ratio >40% were defined as IgG4-high. Ten of the 31 IgG4-RD patients were concluded to have IgG4-GID, in which IgG4-positive plasma cells were notably detected at the deeper part of the mucosa. Six cases displayed BHP whereas the remaining four cases showed transmural infiltration with concomitant Helicobacter pylori-associated gastritis. In addition to BHP, we identified two unique histologic features for IgG4-GID: plasmacytic aggregation in the muscularis mucosae and permeative plasmacytic infiltration between fundic glands in the non-atrophic mucosa. Six of the routine cases (0.35%) displayed BHP, including a case with IgG4-RD. IgG4-GID can be suspected by the presence of gastric biopsy specimens with characteristic histological features. Such cases are recommended to undergo further examinations to determine whether IgG4-RD is present.
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Affiliation(s)
- Kaori Uchino
- Department of Pathology and Experimental Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan.,Department of Anatomic Pathology, Kurashiki Central Hospital, Okayama, Japan
| | - Kenji Notohara
- Department of Anatomic Pathology, Kurashiki Central Hospital, Okayama, Japan
| | - Takeshi Uehara
- Department of Laboratory Medicine, Shinshu University School of Medicine, Nagano, Japan
| | - Yasuhiro Kuraishi
- Department of Gastroenterology, Shinshu University School of Medicine, Nagano, Japan
| | - Junya Itakura
- Department of Anatomic Pathology, Kurashiki Central Hospital, Okayama, Japan
| | - Akihiro Matsukawa
- Department of Pathology and Experimental Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
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Dias AB, Horvat N, Begnami MD, Abe ES, Viana PCC, Machado MCC. Case report of IgG4-related appendiceal disease: A challenging disease. Medicine (Baltimore) 2020; 99:e20588. [PMID: 32569185 PMCID: PMC7310901 DOI: 10.1097/md.0000000000020588] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
RATIONALE Immunoglobulin G4 (IgG4)-related disease is an increasingly recognized immune-mediated entity that can affect virtually every organ system. Depending on the location of the disease, it can present a wide range of clinical manifestations and even mimic malignancies. Appendiceal involvement in patients with IgG4-related disease is particularly rare and very few cases are reported in the literature. PATIENT CONCERNS We report a case of IgG4-related appendiceal disease in a 42-year-old woman who presents with a subacute onset of right lower quadrant abdominal pain. DIAGNOSIS Abdominal computed tomography showed a markedly enlarged appendix, raising the concern of malignancy. The diagnosis of IgG4 appendiceal disease was confirmed by postoperative histopathologic and immunohistochemical examination. INTERVENTIONS The patient underwent right hemicolectomy. OUTCOMES After the surgery, the patient had an uneventful recovery and reported a resolution of her symptoms. The serum IgG4 was revaluated 5 days after surgery and returned to its normal values. At the 3-year follow up, the patient had no recurrence of symptoms and her imaging exams remain unremarkable. LESSONS This study reports the fifth case of IgG4-related appendiceal disease. Increasing awareness of this condition may influence the management of these patients, once patients with IgG4-related disease should be monitored after treatment, due to the risk of recurrence or involvement of other organs.
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Chetty R. A reappraisal of sclerosing nodular and/or polypoid lesions of the gastrointestinal tract rich in IgG4-positive plasma cells. Histopathology 2020; 76:832-837. [PMID: 31919879 DOI: 10.1111/his.14061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 12/14/2019] [Accepted: 01/08/2020] [Indexed: 11/30/2022]
Abstract
AIMS To describe additional cases of nodular and polypoid sclerosing lesions of the gastrointestinal tract (GIT) that are associated with numerous IgG4-positive plasma cells, review the pertinent literature to ascertain the relationship with systemic IgG4-related disease, and provide a reporting framework for such lesions. METHODS AND RESULTS Five new cases of sclerosing polyps or nodules were collected over a 10-year period, occurring in four females and one male ranging in age from 32 years to 56 years (mean, 41.6 years). Patients were asymptomatic or had epigastric pain, and one had rectal bleeding. None had autoimmune or other obvious IgG4-related disease, and serum IgG4 levels were normal. All were solitary nodules in the stomach (two cases), ileum, caecum, and rectum. Four lesions were submucosal and one was subserosal; all were well circumscribed, composed of hyalinised, keloidal fibrous tissue with lymphoplasmacytic inflammation. Obliterative phlebitis was not seen. Lineage-specific immunomarkers were negative. In excess of 10 IgG4-positive plasma cells per high-power field were seen, and the IgG4/IgG ratios were >0.4. CONCLUSIONS Very few IgG4-related lesions in the tubular GIT are associated with disease at other sites and/or elevated serum IgG4 levels. The majority may represent a lesion in the spectrum of IgG4-related disease. The use of the term 'IgG4-positive nodule or polyp with probable histological features of IgG4-related disease' is advocated for nodular and/or polypoid lesions in the GIT with ≥10 IgG4-positive plasma cells in a high-power field and an IgG/IgG4 ratio of >0.4.
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Affiliation(s)
- Runjan Chetty
- Division of Anatomical Pathology, Laboratory Medicine Program, University Health Network and University of Toronto, Toronto, Ontario, Canada
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Ramakrishna B, Yewale R, Vijayakumar K, Radhakrishna P, Ramakrishna BS. Gastric IgG4-related disease presenting as a mass lesion and masquerading as a gastrointestinal stromal tumor. J Pathol Transl Med 2020; 54:258-262. [PMID: 32126738 PMCID: PMC7253960 DOI: 10.4132/jptm.2020.02.10] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Accepted: 02/10/2020] [Indexed: 12/22/2022] Open
Abstract
IgG4-related disease of the stomach is a rare disorder, and only a few cases have been reported. We present two cases that were identified over a 2-month period in our center. Two male patients aged 52 and 48 years presented with mass lesion in the stomach, which were clinically thought to be gastrointestinal stromal tumor, and they underwent excision of the lesion. Microscopic examination revealed marked fibrosis, which was storiform in one case, associated with diffuse lymphoplasmacytic infiltration and an increase in IgG4-positive plasma cells on immunohistochemistry. Serum IgG4 level was markedly elevated. Although rare, IgG4-related disease should be considered in the differential diagnosis of gastric submucosal mass lesions.
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Affiliation(s)
| | - Rohan Yewale
- Department of Medical Gastroenterology, SRM Institutes for Medical Science, Vadapalani, India
| | - Kavita Vijayakumar
- Department of Pathology, SRM Institutes for Medical Science, Vadapalani, India
| | - Patta Radhakrishna
- Department of Surgical Gastroenterology, SRM Institutes for Medical Science, Vadapalani, India
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Lim DY, Cheng LTE, Tan DMY, Al Jajeh I. Isolated IgG4-related gastric disease presenting as diffuse gastric wall thickening with ulcer. J Radiol Case Rep 2019; 12:9-20. [PMID: 30651919 DOI: 10.3941/jrcr.v12i9.3493] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
An 81-year-old male presented with loss of appetite, early satiety and iron deficiency anaemia. A computed tomography (CT) scan of the abdomen and pelvis during initial work-up revealed diffuse gastric mural thickening associated with a large ulcer and adjacent gastro-hepatic lymphadenopathy. The CT appearances, together with the clinical features, were highly suspicious for an infiltrative type of gastric malignancy. Endoscopic biopsy however showed erosive inflammation, IgG4 plasmacytosis and fibrosis, raising the possibility of IgG4-related disease. A serologic assay for IgG showed normal IgG4 and elevated IgG2 serum levels. After appropriate steroid treatment, endoscopy and CT scan showed resolution of the ulcer and gastric wall thickening. This case shows yet another possible appearance of gastric involvement in IgG4-related disease on the current evolving spectrum of this disease presentation. Greater awareness and education of this disease would help in patient care, ensuring earlier diagnosis, prevention of severe organ damage and morbidity, as well as unnecessary surgery.
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Affiliation(s)
- David Yurui Lim
- Department of Diagnostic Radiology, Singapore General Hospital, Singapore
| | | | - Damien Meng Yew Tan
- Department of Gastroenterology and Hepatology, Singapore General Hospital, Singapore
| | - Issam Al Jajeh
- Department of Anatomical Pathology, Singapore General Hospital, Singapore
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Gastrointestinal manifestation of immunoglobulin G4-related disease: clarification through a multicenter survey. J Gastroenterol 2018; 53:845-853. [PMID: 29222587 DOI: 10.1007/s00535-017-1420-4] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Accepted: 11/28/2017] [Indexed: 02/04/2023]
Abstract
BACKGROUND Several reports on immunoglobulin (Ig)G4-related disease (IgG4-RD) with gastrointestinal involvement (IgG4-related gastrointestinal disease; IgG4-GID) have been published, although this entity has not been fully established clinicopathologically. Thus, we carried out a multicenter survey. METHODS Patients with possible IgG4-GID who underwent resection were collected. Histologic slides were reevaluated, and eight cases with diffuse lymphoplasmacytic infiltration but without numerous neutrophils, granulations or epithelioid granulomas were further analyzed. RESULTS Overall, the IgG4 counts (87-345/high-power field) and IgG4/IgG-positive ratio were high (44-115%). The demographic findings included advanced age among the patients (55-80 years) and male preponderance (six cases). Six lesions (five gastric, one esophageal), consisting of lymphoplasmacytic infiltration with neural involvement in the muscularis propria and/or bottom-heavy plasmacytosis in the gastric mucosa, were histologically regarded as highly suggestive of IgG4-RD. Storiform fibrosis and obliterative phlebitis were found in two cases, and the former gave rise to a 7-cm-sized inflammatory pseudotumor (IPT) in one case. Ulceration and carcinoma co-existed in three and two lesions, respectively. All the patients had other organ involvement (OOI), and serum IgG4 levels were markedly elevated (four of five patients). The remaining two cases with gastric IPTs featuring reactive nodular fibrous pseudotumor or nodular lymphoid hyperplasia were regarded as possible cases of IgG4-RD because of the histologic findings and lack of OOI. CONCLUSIONS IgG4-GID is found in the setting of IgG4-RD, often with ulceration or cancer. Characteristic histologic findings are observed in the muscularis propria and gastric mucosa. Cases with IPT may be heterogeneous, and there may be mimickers of IgG4-GID.
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8
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Ciccone F, Ciccone A, Di Ruscio M, Vernia F, Cipolloni G, Coletti G, Calvisi G, Frieri G, Latella G. IgG4-Related Disease Mimicking Crohn's Disease: A Case Report and Review of Literature. Dig Dis Sci 2018; 63:1072-1086. [PMID: 29417330 DOI: 10.1007/s10620-018-4950-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Accepted: 01/26/2018] [Indexed: 02/06/2023]
Affiliation(s)
- Fabiana Ciccone
- Gastroenterology, Hepatology and Nutrition Division, Department of Life, Health and Environmental Sciences, University of L'Aquila, Piazza S. Tommasi, 1, Coppito, 67100, L'Aquila, Italy
| | - Antonio Ciccone
- Gastroenterology, Hepatology and Nutrition Division, Department of Life, Health and Environmental Sciences, University of L'Aquila, Piazza S. Tommasi, 1, Coppito, 67100, L'Aquila, Italy
| | - Mirko Di Ruscio
- Gastroenterology, Hepatology and Nutrition Division, Department of Life, Health and Environmental Sciences, University of L'Aquila, Piazza S. Tommasi, 1, Coppito, 67100, L'Aquila, Italy
| | - Filippo Vernia
- Gastroenterology, Hepatology and Nutrition Division, Department of Life, Health and Environmental Sciences, University of L'Aquila, Piazza S. Tommasi, 1, Coppito, 67100, L'Aquila, Italy
| | - Gianluca Cipolloni
- Pathology Unit, San Salvatore Hospital, Via Lorenzo Natali, 1, Coppito, 67100, L'Aquila, Italy
| | - Gino Coletti
- Pathology Unit, San Salvatore Hospital, Via Lorenzo Natali, 1, Coppito, 67100, L'Aquila, Italy
| | - Giuseppe Calvisi
- Pathology Unit, San Salvatore Hospital, Via Lorenzo Natali, 1, Coppito, 67100, L'Aquila, Italy
| | - Giuseppe Frieri
- Gastroenterology, Hepatology and Nutrition Division, Department of Life, Health and Environmental Sciences, University of L'Aquila, Piazza S. Tommasi, 1, Coppito, 67100, L'Aquila, Italy
| | - Giovanni Latella
- Gastroenterology, Hepatology and Nutrition Division, Department of Life, Health and Environmental Sciences, University of L'Aquila, Piazza S. Tommasi, 1, Coppito, 67100, L'Aquila, Italy.
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Seo HS, Jung YJ, Park CH, Song KY, Jung ES. IgG4-related Disease in the Stomach which Was Confused with Gastrointestinal Stromal Tumor (GIST): Two Case Reports and Review of the Literature. J Gastric Cancer 2018; 18:99-107. [PMID: 29629225 PMCID: PMC5881015 DOI: 10.5230/jgc.2018.18.e8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/25/2017] [Revised: 03/12/2018] [Accepted: 03/21/2018] [Indexed: 12/13/2022] Open
Abstract
Immunoglobulin G4-related disease (IgG4-RD) is an immune-mediated fibro-inflammatory disorder characterized by specific pathological findings and elevated serum IgG4 level. IgG4-RD in the stomach is rare, and occasionally diagnosed as gastric subepithelial tumor (SET) by endoscopy or computed tomography scan. Two female patients in the age group of 40–50 years were diagnosed with 4 cm sized gastric SET. One underwent laparoscopic gastric wedge resection. Another one had a history of subtotal gastrectomy for early gastric cancer and idiopathic thrombocytopenic purpura with oral steroids administration. She underwent a completion total gastrectomy with splenectomy for the gastric SET and ITP. The pathology showed storiform fibrosis, and IgG4 was positive in immunohistochemistry (IHC) stain. IgG4-RD is known as a medical disease that could be treated with oral steroids. The difficulty in preoperative diagnosis of the disease occasionally causes unnecessary gastric resection. Thus, preoperative diagnostic methods for IgG4-RD such as deep biopsy with IHC stain or magnetic resonance imaging are needed.
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Affiliation(s)
- Ho Seok Seo
- Division of Gastrointestinal Surgery, Department of Surgery, Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Uijeongbu, Korea
| | - Yoon Ju Jung
- Division of Gastrointestinal Surgery, Department of Surgery, Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Uijeongbu, Korea
| | - Cho Hyun Park
- Division of Gastrointestinal Surgery, Department of Surgery, Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Uijeongbu, Korea
| | - Kyo Young Song
- Division of Gastrointestinal Surgery, Department of Surgery, Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Uijeongbu, Korea
| | - Eun Sun Jung
- Department of Hospital Pathology, College of Medicine, The Catholic University of Korea, Seoul, Korea
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10
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Ortuño Moreno MI, Ferri Ñíguez B, Martínez Barba E, Fernández Hernández JÁ. An ulcerated gastric ulcer and pseudotumour with pancreatic affectation associated with immunoglobulin G4-related disease: a case report and literature review. REVISTA ESPANOLA DE ENFERMEDADES DIGESTIVAS 2017; 109:870-874. [PMID: 29082738 DOI: 10.17235/reed.2017.4996/2017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We report the case of a 67 year old male who presented with a nine year history of a gastric ulcer with symptoms of hematemesis and melena. Histological analysis identified fibrotic lesions and the accumulation of immunoglobulin G4-positive plasma cells with no evidence of malignancy. The lesion extended into the pancreas, where histological lesions and gastric lesions were also observed. This is a case of an ulcerated gastric ulcer and pseudo-tumor with pancreatic affection that is associated with immunoglobulin G4-related disease.
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Affiliation(s)
| | - Belén Ferri Ñíguez
- Anatomía patológica, Hospital Clínico Universitario Virgen de la Arrixaca, España
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Inoue D, Yoneda N, Yoshida K, Nuka H, Kinoshita J, Fushida S, Toshima F, Minami T, Takahira M, Hamaoka S, Ikeda H, Gabata T, Kawano M. Imaging and pathological features of gastric lesion of immunoglobulin G4-related disease: A case report and review of the recent literature. Mod Rheumatol 2016; 29:377-382. [DOI: 10.1080/14397595.2016.1209819] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Dai Inoue
- Department of Radiology, Kanazawa University Graduate School of Medical Science, Kanazawa, Japan,
| | - Norihide Yoneda
- Department of Radiology, Kanazawa University Graduate School of Medical Science, Kanazawa, Japan,
| | - Kotaro Yoshida
- Department of Radiology, Kanazawa University Graduate School of Medical Science, Kanazawa, Japan,
| | - Hiromi Nuka
- Division of Rheumatology, Kanazawa University Graduate School of Medical Science, Kanazawa, Japan,
| | - Jun Kinoshita
- Department of Gastroenterological Surgery, Kanazawa University Graduate School of Medical Science, Kanazawa, Japan,
| | - Sachio Fushida
- Department of Gastroenterological Surgery, Kanazawa University Graduate School of Medical Science, Kanazawa, Japan,
| | - Fumihito Toshima
- Department of Radiology, Kanazawa University Graduate School of Medical Science, Kanazawa, Japan,
| | - Tetsuya Minami
- Department of Radiology, Kanazawa University Graduate School of Medical Science, Kanazawa, Japan,
| | - Masayuki Takahira
- Department of Ophthalmology, Kanazawa University Graduate School of Medical Science, Kanazawa, Japan, and
| | - Shoko Hamaoka
- Department of Ophthalmology, Kanazawa University Graduate School of Medical Science, Kanazawa, Japan, and
| | - Hiroko Ikeda
- Division of Pathology, Kanazawa University Hospital, Kanazawa, Japan
| | - Toshifumi Gabata
- Department of Radiology, Kanazawa University Graduate School of Medical Science, Kanazawa, Japan,
| | - Mitsuhiro Kawano
- Division of Rheumatology, Kanazawa University Graduate School of Medical Science, Kanazawa, Japan,
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Chougule A, Bal A. IgG4-related inflammatory pseudotumor: A systematic review of histopathological features of reported cases. Mod Rheumatol 2016; 27:320-325. [PMID: 27416329 DOI: 10.1080/14397595.2016.1206241] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OBJECTIVES There is marked inconsistency in reporting the key features of IgG4-related inflammatory pseudotumor (IPT) cases. We aimed to analyze the various aspects of IgG4-related IPTs and to test the performance of the consensus criteria for their diagnosis. METHODS PubMed database was searched for IgG4-related IPT cases. The data regarding patient demographics, clinical presentation, laboratory findings, histopathological features, and treatment response are extracted and are presented here in a descriptive manner. RESULTS The study included 40 papers describing the clinicopathological features of 83 IPTs in 80 patients. Seventeen cases were diagnosed on biopsies; while remaining were diagnosed on excision specimens. Among these, 50 cases were categorized as highly suggestive and 24 cases as probable for IgG4RD; while nine cases had insufficient histopathological evidence of IgG4RD. Two cases diagnosed on biopsies having insufficient evidence of IgG4RD showed partial or no response to steroids; while 12/14 cases (85.71%) diagnosed on biopsies that were histologically suggestive or probable for IgG4RD showed prompt response to steroids. CONCLUSION Many reports have not specifically mentioned the full histopathological findings of IgG4-related IPTs that may hinder in refining the diagnostic criteria of IgG4RD. The IgG4-related IPTs diagnosed on biopsies with requisite features showed prompt response to steroids indicating specificity of histopathological findings in predicting treatment response.
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Affiliation(s)
- Abhijit Chougule
- a Department of Histopathology , Post Graduate Institute of Medical Education and Research, (PGIMER) , Sector 12 , Chandigarh , India
| | - Amanjit Bal
- a Department of Histopathology , Post Graduate Institute of Medical Education and Research, (PGIMER) , Sector 12 , Chandigarh , India
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Bulanov D, Arabadzhieva E, Bonev S, Yonkov A, Kyoseva D, Dikov T, Dimitrova V. A rare case of IgG4-related disease: a gastric mass, associated with regional lymphadenopathy. BMC Surg 2016; 16:37. [PMID: 27255154 PMCID: PMC4890503 DOI: 10.1186/s12893-016-0151-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2016] [Accepted: 05/19/2016] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND IgG4-related disease (IgG4-RD) is a newly recognized disorder, characterized by massive IgG4+ lymphocyte and plasma cell infiltration, storiform fibrosis, causing enlargement, nodules or thickening of the various organs, simultaneously or metachronously. Involvement of the gastrointestinal tract is very rare and can be presented as a diffuse wall thickening or polyp or mass-like lesion. Up to now, there have been reported only a few cases of isolated gastric IgG4-RD. CASE PRESENTATION We present an unusual case of IgG4-RD of the stomach with involvement of the regional lymph nodes, clinically manifested as a gastric cancer with related pyloric stenosis. The patient underwent distal gastrectomy, omentectomy and lymph node dissection. The postoperative serum IgG4 level was increased. The diagnosis was confirmed by immunohistochemical study. CONCLUSIONS In the most of the reported cases there was not sufficient data about the regional lymph nodal status, although the majority of the patients had been operated with presumptive diagnosis of gastric neoplasm. Our case is rare and valuable because it presents a gastric IgG4-related lesion larger than all previously reported in literature, and IgG4-related lymphadenopathy, confirmed histologically, which contributes to better knowledge of the disease.
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Affiliation(s)
- Dimitar Bulanov
- Department of General and Hepato-pancreatic Surgery, Medical University of Sofia, University Hospital "Alexandrovska", 1 Georgi Sofiiski Str, 1431, Sofia, Bulgaria
| | - Elena Arabadzhieva
- Department of General and Hepato-pancreatic Surgery, Medical University of Sofia, University Hospital "Alexandrovska", 1 Georgi Sofiiski Str, 1431, Sofia, Bulgaria.
| | - Sasho Bonev
- Department of General and Hepato-pancreatic Surgery, Medical University of Sofia, University Hospital "Alexandrovska", 1 Georgi Sofiiski Str, 1431, Sofia, Bulgaria
| | - Atanas Yonkov
- Department of General and Hepato-pancreatic Surgery, Medical University of Sofia, University Hospital "Alexandrovska", 1 Georgi Sofiiski Str, 1431, Sofia, Bulgaria
| | - Diana Kyoseva
- Department of General and Clinical Pathology, Medical University of Sofia, 2 Zdrave Str, 1431, Sofia, Bulgaria
| | - Tihomir Dikov
- Department of General and Clinical Pathology, Medical University of Sofia, 2 Zdrave Str, 1431, Sofia, Bulgaria
| | - Violeta Dimitrova
- Department of General and Hepato-pancreatic Surgery, Medical University of Sofia, University Hospital "Alexandrovska", 1 Georgi Sofiiski Str, 1431, Sofia, Bulgaria
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Cheong HR, Lee BE, Song GA, Kim GH, An SG, Lim W. Immunoglobulin G4-Related Inflammatory Pseudotumor Presenting as a Solitary Mass in the Stomach. Clin Endosc 2016; 49:197-201. [PMID: 26867551 PMCID: PMC4821516 DOI: 10.5946/ce.2015.074] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Revised: 06/26/2015] [Accepted: 07/11/2015] [Indexed: 12/24/2022] Open
Abstract
Immunoglobulin G4 (IgG4)-related disease (IgG4RD) is a relatively recently recognized entity that is histopathologically characterized by an extensive infiltration of lymphocytes and IgG4-positive plasma cells with dense fibrosis. IgG4RD is now known to affect any organ system, and a few cases of gastrointestinal lesions have also been reported. However, solitary IgG4RD of the stomach is still very rare. Furthermore, as it can mimic malignant conditions, it is important to recognize this disease to avoid unnecessary surgery. Herein, we present a case of IgG4RD presenting as an isolated subepithelial mass in the stomach.
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Affiliation(s)
- Hong Ryeol Cheong
- Department of Internal Medicine, Pusan National University School of Medicine, Busan, Korea
| | - Bong Eun Lee
- Department of Internal Medicine, Pusan National University School of Medicine, Busan, Korea
| | - Geun Am Song
- Department of Internal Medicine, Pusan National University School of Medicine, Busan, Korea
| | - Gwang Ha Kim
- Department of Internal Medicine, Pusan National University School of Medicine, Busan, Korea
| | - Sung Gyu An
- Department of Internal Medicine, Pusan National University School of Medicine, Busan, Korea
| | - Won Lim
- Department of Internal Medicine, Pusan National University School of Medicine, Busan, Korea
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15
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Sarkar A, Pitchumoni CS. The protean manifestations of IgG4-RD in gastrointestinal disorders. Dis Mon 2015; 61:493-515. [DOI: 10.1016/j.disamonth.2015.09.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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16
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Kawano H, Ishii A, Kimura T, Takahashi T, Hironaka H, Kawano M, Yamaguchi M, Oishi K, Kubo M, Matsui S, Notohara K, Ikeda E. IgG4-related disease manifesting the gastric wall thickening. Pathol Int 2015; 66:23-8. [DOI: 10.1111/pin.12364] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Accepted: 10/20/2015] [Indexed: 12/17/2022]
Affiliation(s)
- Hiroo Kawano
- Department of Laboratory Science, Faculty of Health Science; Yamaguchi University Graduate School of Medicine; Ube Japan
| | - Aya Ishii
- Department of Pathology; Yamaguchi University Graduate School of Medicine; Ube Japan
| | - Tokuhiro Kimura
- Department of Pathology; Yamaguchi University Graduate School of Medicine; Ube Japan
| | | | - Hideharu Hironaka
- Department of Surgery; Saiseikai Yamaguchi Hospital; Yamaguchi Japan
| | - Michitaka Kawano
- Department of Internal Medicine; Saiseikai Yamaguchi Hospital; Yamaguchi Japan
| | - Michiya Yamaguchi
- Department of Dermatology; Yamaguchi University Graduate School of Medicine; Ube Japan
| | - Keiji Oishi
- Department of Internal medicine; Ube Medical Center; Ube Japan
| | - Makoto Kubo
- Department of Medicine and Clinical Science; Yamaguchi University Graduate School of Medicine; Ube Japan
| | - Shoko Matsui
- Health Administration Center; Toyama University; Toyama Japan
| | - Kenji Notohara
- Department of Anatomic Pathology; Kurashiki Central Hospital; Kurashiki Japan
| | - Eiji Ikeda
- Department of Pathology; Yamaguchi University Graduate School of Medicine; Ube Japan
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17
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Woo CG, Yook JH, Kim AY, Kim J. IgG4-Related Disease Presented as a Mural Mass in the Stomach. J Pathol Transl Med 2015; 50:67-70. [PMID: 26420251 PMCID: PMC4734962 DOI: 10.4132/jptm.2015.07.28] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Accepted: 07/28/2015] [Indexed: 02/07/2023] Open
Abstract
Isolated gastric IgG4-related disease (IgG4-RD) is a very rare tumefactive inflammatory condition, with only a few cases reported to date. A 48-year-old woman was incidentally found to have a subepithelial tumor in the stomach. Given a presumptive diagnosis of gastrointestinal stromal tumor or neuroendocrine tumor, she underwent wedge resection. The lesion was vaguely nodular and mainly involved the submucosa and proper muscle layer. Microscopically, all classical features of type I autoimmune pancreatitis including lymphoplasmacytic infiltration, storiform fibrosis, obliterative phlebitis, and numerous IgG4-positive plasma cells were seen. She had no evidence of IgG4-RD in other organs. Although very rare, IgG4-RD should be considered one of the differential diagnoses in the setting of gastric wall thickening or subepithelial mass-like lesion. Deep biopsy with awareness of this entity might avoid unnecessary surgical intervention.
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Affiliation(s)
- Chang Gok Woo
- Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Jeong Hwan Yook
- Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Ah Young Kim
- Department of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea ; Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Jihun Kim
- Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
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18
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Inoue K, Okubo T, Kato T, Shimamura K, Sugita T, Kubota M, Kanaya K, Yamachika D, Sato M, Inoue D, Harada K, Kawano M. IgG4-related stomach muscle lesion with a renal pseudotumor and multiple renal rim-like lesions: A rare manifestation of IgG4-related disease. Mod Rheumatol 2015; 28:188-192. [DOI: 10.3109/14397595.2015.1081743] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Koichi Inoue
- Division of Surgery, Yamachika Memorial Hospital, Odawara, Kanagawa, Japan,
| | - Takehiko Okubo
- Division of Internal Medicine, Yamachika Memorial Hospital, Odawara, Kanagawa, Japan,
| | - Takashi Kato
- Division of Rheumatology, Yamachika Memorial Hospital, Odawara, Kanagawa, Japan,
| | - Kazuo Shimamura
- Division of Pathology, Yamachika Memorial Hospital, Odawara, Kanagawa, Japan,
| | - Teruji Sugita
- Division of Surgery, Yamachika Memorial Hospital, Odawara, Kanagawa, Japan,
| | - Mitsuhiro Kubota
- Division of Surgery, Yamachika Memorial Hospital, Odawara, Kanagawa, Japan,
| | - Kohji Kanaya
- Division of Surgery, Yamachika Memorial Hospital, Odawara, Kanagawa, Japan,
| | - Daisuke Yamachika
- Division of Surgery, Yamachika Memorial Hospital, Odawara, Kanagawa, Japan,
| | - Makoto Sato
- Division of Surgery, Yamachika Memorial Hospital, Odawara, Kanagawa, Japan,
| | - Dai Inoue
- Department of Radiology, Kanazawa University Graduate School of Medicine, Kanazawa, Ishikawa, Japan,
| | - Kenichi Harada
- Department of Human Pathology, Kanazawa University Graduate School of Medicine, Kanazawa, Ishikawa, Japan, and
| | - Mitsuhiro Kawano
- Division of Rheumatology, Department of Internal Medicine, Kanazawa University Graduate School of Medicine, Kanazawa, Ishikawa, Japan
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19
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Huang Y, Li LP, Wang J, Lun ZJ, Li W, Yang Z. Inflammatory pseudotumor of the colon causing intussusception: A case report and literature review. World J Gastroenterol 2015; 21:704-710. [PMID: 25593502 PMCID: PMC4292308 DOI: 10.3748/wjg.v21.i2.704] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2014] [Revised: 06/18/2014] [Accepted: 07/30/2014] [Indexed: 02/06/2023] Open
Abstract
Inflammatory pseudotumor (IPT) is a rare space-occupying lesion of unknown etiology that can mimic malignancy on clinic-radiological and pathological examination. We describe a rare case of ileocecal intussusception from clinically suspected malignancy of the right colon where the patient underwent right hemicolectomy. Histopathology of the resected specimen confirmed IPT of the colon. This patient was observed to have abnormally elevated total leukocyte count and platelets before and after surgery. In an adult with intussusception associated with an abdominal mass, the possibility of IPT of the colon should be considered. Considering the abnormally high total leukocyte and platelet counts and colonic IPT, it is necessary to prevent postoperative adverse effects due to these changes. Although IPT of the colon is usually a benign process, controversy regarding its management still exists. We consider hemicolectomy as a safe treatment approach for colonic IPT and review the existing literature.
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20
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Zhang H, Jin Z, Ding S. Gastric calcifying fibrous tumor: A case of suspected immunoglobulin G4-related gastric disease. Saudi J Gastroenterol 2015; 21:423-6. [PMID: 26655140 PMCID: PMC4707813 DOI: 10.4103/1319-3767.170950] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Gastrointestinal lesions resulting from immunoglobulin G4-related disease are classified into two types: One is a gastrointestinal lesion showing marked thickening of the wall, and the other is an IgG4-related pseudotumor. We report the case of a woman with gastric calcifying fibrous tumor undergoing endoscopic resection that contained 62 IgG4+ plasma cells per high-power field and an IgG4-to-IgG ratio of 41% in lesional plasma cells, which shared clinical and histopathological features associated with gastric IgG4-related pseudotumor. So, we postulate that calcifying fibrous tumor as part of the spectrum of IgG4-related disease might be the unifying concept with IgG4-related pseudotumor. Meanwhile, the patient had coexistent autoimmune diseases, including autoimmune atrophic gastritis, Hashimoto's thyroiditis, and possible primary biliary cirrhosis. The clinical follow-up evaluation was uneventful.
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Affiliation(s)
- Hejun Zhang
- Department of Gastroenterology, Peking University Third Hospital, Beijing, China
| | - Zhu Jin
- Department of Gastroenterology, Peking University Third Hospital, Beijing, China
| | - Shigang Ding
- Department of Gastroenterology, Peking University Third Hospital, Beijing, China,Address for correspondence: Dr. Shigang Ding, No. 49 Road Huayuan North, Haidian District, Beijing - 100191, PR China. E-mail:
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21
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Frydman J, Grunner S, Kluger Y. IgG4-related disease manifesting as an acute gastric-pericardial fistula. World J Gastroenterol 2014; 20:16782-16785. [PMID: 25469052 PMCID: PMC4248227 DOI: 10.3748/wjg.v20.i44.16782] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Revised: 05/10/2014] [Accepted: 07/25/2014] [Indexed: 02/06/2023] Open
Abstract
IgG4-related disease is a recently recognized entity linked initially to autoimmune pancreatitis and has been subsequently described in nearly every organ system. Men over the age of 50 represent the most affected demographic group and a comprehensive set of diagnostic criteria has been developed to aid treating clinicians. Though elevated levels of IgG4 in the serum are suggestive of the disease, definitive diagnosis is made on histopathology. Treatment is tailored to the clinical presentation with corticosteroid therapy known to have proven efficacy. Gastric manifestations of the IgG4-related disease primarily come in two varieties, notably chronic ulceration or pseudotumor formation. Autoimmune pancreatitis conveys increased risk for IgG4-related disease of the stomach, which is independent of Helicobacter pylori status. In this case report, we present an acute gastric-pericardial fistula secondary to IgG4-related disease that required urgent operative management. To our knowledge, this is the first report in the medical literature describing this complication of IgG4-related disease.
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22
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Hiyoshi Y, Oki E, Zaitsu Y, Ando K, Ito S, Saeki H, Morita M, Yamamoto H, Baba H, Maehara Y. IgG4-related disease of the ileocecal region mimicking malignancy: A case report. Int J Surg Case Rep 2014; 5:669-72. [PMID: 25194601 PMCID: PMC4189076 DOI: 10.1016/j.ijscr.2014.08.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Revised: 08/04/2014] [Accepted: 08/04/2014] [Indexed: 12/24/2022] Open
Abstract
The colonic IgG4-RD is rare. We report the case of a74-year-old female with IgG4-RD of the ileocecal region. The patient was diagnosed asmalignant lymphoma and underwent right-hemi colectomy. Postoperative pathologicalexamination revealed IgG4-RD of the ileocecal region. Surgical resection for IgG4-RDis necessary for cases with concerns of malignancy.
INTRODUCTION Immunoglobulin G4-related disease (IgG4-RD) is a systemic disease characterized by chronic fibrosing inflammation with abundant IgG4-positive plasma cells, and responds well to steroids. Previous reports of IgG4-RD have focused on pancreatic and extrapancreatic including the gastrointestinal tract, however, the colonic IgG4-RD is rare. PRESENTATION OF CASE We herein report the case of a 74-year-old female with edematous wall thickening of the terminal ileum to the lower ascending colon confirmed by several preoperative imaging studies, who underwent right hemi-colectomy for suspected malignant lymphoma. The resected specimen showed an irregular wall thickness with subserosal sclerosis, and the lesion was 10 cm in length from the terminal ileum to the ascending colon. The patient was diagnosed with IgG4-RD by pathological examinations, which demonstrated an increased number of IgG4-positive plasma cells (150/HPF), and an elevated IgG4/IgG ratio (50%). DISCUSSION Gastrointestinal IgG4-RD appears to be difficult to diagnose prior to surgical resection because of its rarity, and the similarity of its features to malignancy. The measurement of the serum IgG4 levels, immunohistochemical examination of biopsy specimens and use of several imaging modalities might help us to diagnose the disease without surgical resection, and this disease can generally be treated with steroid therapy. However, surgical resection for IgG4-RD may still be also necessary for patients with concerns regarding malignancy or with intractable gastrointestinal obstruction caused by this disease. CONCLUSION Gastrointestinal IgG4-RD often mimics malignancy, and we should therefore consider this disease in the differential diagnosis of colonic lesions in order to optimize the treatment.
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Affiliation(s)
- Yukiharu Hiyoshi
- Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Japan.
| | - Eiji Oki
- Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Japan
| | - Yoko Zaitsu
- Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Japan
| | - Koji Ando
- Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Japan
| | - Shuhei Ito
- Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Japan
| | - Hiroshi Saeki
- Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Japan
| | - Masaru Morita
- Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Japan
| | - Hidetaka Yamamoto
- Department of Anatomic Pathology, Pathological Sciences, Graduate School of Medical Sciences, Kyushu University, Japan
| | - Hideo Baba
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Japan
| | - Yoshihiko Maehara
- Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Japan
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Koizumi S, Kamisawa T, Kuruma S, Tabata T, Chiba K, Iwasaki S, Endo Y, Kuwata G, Koizumi K, Shimosegawa T, Okazaki K, Chiba T. Immunoglobulin G4-related gastrointestinal diseases, are they immunoglobulin G4-related diseases? World J Gastroenterol 2013; 19:5769-5774. [PMID: 24124321 PMCID: PMC3793131 DOI: 10.3748/wjg.v19.i35.5769] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Revised: 05/30/2013] [Accepted: 07/19/2013] [Indexed: 02/06/2023] Open
Abstract
In immunoglobulin G4 (IgG4)-related disease (RD), organ enlargement or nodular lesions consisting of abundant infiltration of lymphocytes and IgG4-positive plasma cells and fibrosis are seen in various organs. Although infiltration of many IgG4-positive plasma cells is detected in the gastric and colonic mucosa and major duodenal papilla of patients with autoimmune pancreatitis, it cannot be diagnosed as a gastrointestinal lesion involved in IgG4-RD, because none of the following is observed in these lesions: a mass-like formation; dense fibrosis; or obliterative phlebitis. Based on our review of the literature, there appear to be two types of IgG4-related gastrointestinal disease. One is a gastrointestinal lesion showing marked thickening of the wall of the esophagus and stomach, consisting of dense fibrosis with abundant infiltration of IgG4-positive plasma cells, which usually show submucosal spreading. The other is an IgG4-related pseudotumor occurring in gastrointestinal regions such as the stomach, colon, and major duodenal papilla, showing polypoid or mass-like lesions. Most solitary IgG4-related gastrointestinal lesions that are not associated with other IgG4-RD appear to be difficult to diagnose. It is of utmost importance to rule out malignancy. However, these lesions may respond to steroid therapy. To avoid unnecessary resection, IgG4-related gastrointestinal diseases should be considered in the differential diagnosis.
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