{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T16:52:59Z","timestamp":1791305579221,"version":"4.3.1"},"reference-count":21,"publisher":"BMJ","issue":"10","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Case Rep"],"accepted":{"date-parts":[[2026,9,26]]},"published-print":{"date-parts":[[2026,10]]},"abstract":"<jats:p>A girl in the first decade of life presented with a 1.5\u2009year history of gradually progressive bilateral upper eyelid swelling with bilateral proptosis, more prominent on the right side. She had a partial response to oral prednisolone, but symptoms recurred during tapering. Examination showed firm bilateral upper eyelid masses, preserved vision and mild restriction of upward gaze in the right eye. MRI demonstrated right preseptal\/periorbital soft tissue thickening. Further evaluation excluded infection, vasculitis, sarcoidosis and malignancy; serum IgG4 level was normal. Biopsy of the right eyelid lesion showed concentric perivascular fibrosis with eosinophil-rich lymphoplasmacytic infiltrate, consistent with eosinophilic angiocentric fibrosis, supporting a diagnosis of possible organ-limited IgG4-related disease. The patient was treated with oral prednisolone and mycophenolate mofetil, resulting in sustained clinical improvement. This case highlights that paediatric IgG4-related disease may present as isolated orbital swelling with normal serum IgG4, making histopathology crucial for diagnosis.<\/jats:p>","DOI":"10.1136\/bcr-2026-276113","type":"journal-article","created":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T16:05:25Z","timestamp":1791302725000},"page":"e276113","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":0,"title":["Eosinophilic angiocentric fibrosis in paediatric IgG4-related disease"],"prefix":"10.1136","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0009-0007-2079-5292","authenticated-orcid":false,"given":"Rupal","family":"Prasad","sequence":"first","affiliation":[{"name":"Clinical Immunology and Rheumatology, King George's Medical University, Lucknow, Uttar Pradesh, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9151-8141","authenticated-orcid":false,"given":"Parag","family":"Vijayvergia","sequence":"additional","affiliation":[{"name":"Clinical Immunology and Rheumatology, King George's Medical University, Lucknow, Uttar Pradesh, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mahima","family":"Khatkar","sequence":"additional","affiliation":[{"name":"Clinical Immunology and Rheumatology, King George's Medical University, Lucknow, Uttar Pradesh, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Puneet","family":"Kumar","sequence":"additional","affiliation":[{"name":"Clinical Immunology and Rheumatology, King George's Medical University, Lucknow, Uttar Pradesh, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bandana","family":"Mehrotra","sequence":"additional","affiliation":[{"name":"RML Mehrotra Pathology, Lucknow, Uttar Pradesh, India"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"239","published-online":{"date-parts":[[2026,10,6]]},"reference":[{"key":"2026100609051817000_19.10.e276113.1","doi-asserted-by":"crossref","first-page":"97","DOI":"10.1080\/1744666X.2023.2274358","article-title":"Pediatric IgG4-related disease: a descriptive review","volume":"20","author":"Hara","year":"2024","journal-title":"Expert Rev Clin Immunol"},{"key":"2026100609051817000_19.10.e276113.2","doi-asserted-by":"crossref","DOI":"10.1136\/bmj.m1067","article-title":"Advances in the diagnosis and management of IgG4 related disease","volume":"369","author":"Lanzillotta","year":"2020","journal-title":"BMJ"},{"key":"2026100609051817000_19.10.e276113.3","doi-asserted-by":"publisher","DOI":"10.1186\/s13075-017-1467-x"},{"key":"2026100609051817000_19.10.e276113.4","doi-asserted-by":"publisher","DOI":"10.1080\/14397595.2020.1859710"},{"key":"2026100609051817000_19.10.e276113.5","doi-asserted-by":"crossref","DOI":"10.1186\/s12969-016-0079-3","article-title":"IgG4-related disease: a systematic review of this unrecognized disease in pediatrics","volume":"14","author":"Karim","year":"2016","journal-title":"Pediatr Rheumatol Online J"},{"key":"2026100609051817000_19.10.e276113.6","doi-asserted-by":"crossref","DOI":"10.3389\/fimmu.2026.1832660","article-title":"Case report: The masquerading spectrum: a pediatric case series of IgG4-related disease","volume":"17","author":"Shpitonkova","year":"2026","journal-title":"Front Immunol"},{"key":"2026100609051817000_19.10.e276113.7","doi-asserted-by":"crossref","DOI":"10.1016\/j.waojou.2023.100765","article-title":"Implication of allergy and atopy in IgG4-related disease","volume":"16","author":"D\u2019Astous-Gauthier","year":"2023","journal-title":"World Allergy Organ J"},{"key":"2026100609051817000_19.10.e276113.8","doi-asserted-by":"publisher","DOI":"10.1136\/annrheumdis-2018-214603"},{"key":"2026100609051817000_19.10.e276113.9","doi-asserted-by":"crossref","first-page":"1177","DOI":"10.1007\/s00296-021-04885-5","article-title":"IgG4-related disease in pediatric patients: a single-center experience","volume":"42","author":"Kaya Akca","year":"2022","journal-title":"Rheumatol Int"},{"key":"2026100609051817000_19.10.e276113.10","doi-asserted-by":"crossref","first-page":"1721","DOI":"10.1007\/s10067-017-3934-9","article-title":"Ocular manifestations of IgG4-related disease in children. 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