<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE root>
<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Digital Diagnostics</journal-id><journal-title-group><journal-title xml:lang="en">Digital Diagnostics</journal-title><trans-title-group xml:lang="ru"><trans-title>Digital Diagnostics</trans-title></trans-title-group><trans-title-group xml:lang="zh"><trans-title>Digital Diagnostics</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2712-8490</issn><issn publication-format="electronic">2712-8962</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">677828</article-id><article-id pub-id-type="doi">10.17816/DD677828</article-id><article-id pub-id-type="edn">MLMPMF</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Case reports</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Клинические случаи и серии клинических случаев</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="zh"><subject>临床病例及临床病例的系列</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Fatal lupus flare presented as syndrome of inappropriate antidiuretic hormone secretion and hemorrhagic gastroenteritis: a case report</article-title><trans-title-group xml:lang="ru"><trans-title>Фатальное обострение системной красной волчанки, проявившееся синдромом неадекватной секреции антидиуретического гормона и геморрагическим гастроэнтеритом: клинический случай</trans-title></trans-title-group><trans-title-group xml:lang="zh"><trans-title>致命性系统性红斑狼疮急性发作，表现为抗利尿激素分泌不当综合征和出血性胃肠炎：临床病例</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0007-3327-009X</contrib-id><name-alternatives><name xml:lang="en"><surname>Dalgatova</surname><given-names>Kira S.</given-names></name><name xml:lang="ru"><surname>Далгатова</surname><given-names>Кира Сергеевна</given-names></name><name xml:lang="zh"><surname>Dalgatova</surname><given-names>Kira S.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD</p></bio><bio xml:lang="zh"><p>MD</p></bio><email>kira_1975@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1071-0877</contrib-id><contrib-id contrib-id-type="spin">5690-4452</contrib-id><name-alternatives><name xml:lang="en"><surname>Kotova</surname><given-names>Daria P.</given-names></name><name xml:lang="ru"><surname>Котова</surname><given-names>Дарья Павловна</given-names></name><name xml:lang="zh"><surname>Kotova</surname><given-names>Daria P.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Dr. Sci. (Medicine)</p></bio><bio xml:lang="ru"><p>д-р мед. наук</p></bio><bio xml:lang="zh"><p>MD, Dr. Sci. (Medicine)</p></bio><email>doc.kotova@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0004-5812-4070</contrib-id><name-alternatives><name xml:lang="en"><surname>Khlavno</surname><given-names>Anna B.</given-names></name><name xml:lang="ru"><surname>Хлавно</surname><given-names>Анна Борисовна</given-names></name><name xml:lang="zh"><surname>Khlavno</surname><given-names>Anna B.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD</p></bio><bio xml:lang="zh"><p>MD</p></bio><email>Anna.khlavno@yandex.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0426-2636</contrib-id><contrib-id contrib-id-type="spin">3991-9420</contrib-id><name-alternatives><name xml:lang="en"><surname>Bogdanova</surname><given-names>Alexandra A.</given-names></name><name xml:lang="ru"><surname>Богданова</surname><given-names>Александра Андреевна</given-names></name><name xml:lang="zh"><surname>Bogdanova</surname><given-names>Alexandra A.</given-names></name></name-alternatives><bio xml:lang="en"><p>MD</p></bio><bio xml:lang="zh"><p>MD</p></bio><email>doc.aabogdanova@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3952-6865</contrib-id><contrib-id contrib-id-type="spin">7311-9276</contrib-id><name-alternatives><name xml:lang="en"><surname>Pershina</surname><given-names>Ekaterina S.</given-names></name><name xml:lang="ru"><surname>Першина</surname><given-names>Екатерина Сергеевна</given-names></name><name xml:lang="zh"><surname>Pershina</surname><given-names>Ekaterina S.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Cand. Sci (Medicine)</p></bio><bio xml:lang="ru"><p>канд. мед. наук</p></bio><bio xml:lang="zh"><p>MD, Cand. Sci (Medicine)</p></bio><email>pershina86@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1972-7336</contrib-id><contrib-id contrib-id-type="spin">6195-3616</contrib-id><name-alternatives><name xml:lang="en"><surname>Magomedov</surname><given-names>Marat A.</given-names></name><name xml:lang="ru"><surname>Магомедов</surname><given-names>Марат Адессович</given-names></name><name xml:lang="zh"><surname>Magomedov</surname><given-names>Marat A.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD</p></bio><bio xml:lang="zh"><p>MD</p></bio><email>mma16@bk.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5649-2193</contrib-id><contrib-id contrib-id-type="spin">8449-6590</contrib-id><name-alternatives><name xml:lang="en"><surname>Sinitsin</surname><given-names>Valentin E.</given-names></name><name xml:lang="ru"><surname>Синицын</surname><given-names>Валентин Евгеньевич</given-names></name><name xml:lang="zh"><surname>Sinitsin</surname><given-names>Valentin E.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Dr. Sci. (Medicine) Professor</p></bio><bio xml:lang="ru"><p>д-р мед. наук, профессор</p></bio><bio xml:lang="zh"><p>MD, Dr. Sci. (Medicine) Professor</p></bio><email>vsini@mail.ru</email><xref ref-type="aff" rid="aff3"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Olymp Clinic Mars</institution></aff><aff><institution xml:lang="ru">Клиника «Олимп Марс»</institution></aff><aff><institution xml:lang="zh">Olymp Clinic Mars</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">City Clinical Hospital No. 1 named after N.I. Pirogov</institution></aff><aff><institution xml:lang="ru">Городская клиническая больница № 1 имени Н.И. Пирогова</institution></aff><aff><institution xml:lang="zh">City Clinical Hospital No. 1 named after N.I. Pirogov</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Lomonosov Moscow State University</institution></aff><aff><institution xml:lang="ru">Московский государственный университет имени М.В. Ломоносова</institution></aff><aff><institution xml:lang="zh">Lomonosov Moscow State University</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2026-04-06" publication-format="electronic"><day>06</day><month>04</month><year>2026</year></pub-date><pub-date date-type="pub" iso-8601-date="2026-04-30" publication-format="electronic"><day>30</day><month>04</month><year>2026</year></pub-date><volume>7</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><issue-title xml:lang="zh"/><fpage>107</fpage><lpage>115</lpage><history><date date-type="received" iso-8601-date="2025-03-28"><day>28</day><month>03</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2026-02-03"><day>03</day><month>02</month><year>2026</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2026, Eco-Vector</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2026, Эко-вектор</copyright-statement><copyright-statement xml:lang="zh">Copyright ©; 2026, Eco-Vector</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="en">Eco-Vector</copyright-holder><copyright-holder xml:lang="ru">Эко-вектор</copyright-holder><copyright-holder xml:lang="zh">Eco-Vector</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nc-nd/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://jdigitaldiagnostics.com/DD/article/view/677828">https://jdigitaldiagnostics.com/DD/article/view/677828</self-uri><abstract xml:lang="en"><p>Systemic lupus erythematosus is a multisystem autoimmune disease. The disease may have various manifestations and sometimes can be challenging to diagnose because of multiple clinical symptoms and their combinations. At the same time, early diagnosis may be crucial for patient survival.</p> <p>We report the case of a 34-year-old man with no history of systemic lupus erythematosus. He presented with severe hyponatremia due to the syndrome of inappropriate antidiuretic hormone secretion and lupus enteritis and developed hemorrhagic gastritis soon afterwards. Although his symptoms and laboratory findings had been persisting for months before admission, systemic lupus erythematosus had not been diagnosed until he developed life-threatening complications. Systemic lupus erythematosus was suspected upon admission to our hospital based on the combination of symptoms, such as long-term fever, seizures, cytopenia, and oral ulcerations. Computed tomography imaging, which appeared to be quite typical of lupus enteritis, raised additional clinical suspicion. Subsequent echocadiography revealed Libman–Sacks endocarditis involving the aortic valve. Serological testing confirmed systemic lupus erythematosus (antinuclear antibody 1:5120, anti-dsDNA positivity, and hypocomplementemia). After management and initial improvement of hyponatremia, he developed recurrent episodes of upper gastrointestinal bleeding. At day 4 after admission, the patient developed pneumonia followed by respiratory distress a few days later. Despite aggressive treatment with corticosteroids and antibiotics, the patient succumbed to respiratory failure and septic shock. Autopsy findings supported systemic lupus erythematosus-related disorders, including vasculitis and sterile vegetation on aortic valve cusps.</p> <p>This case highlights the diagnostic challenges of systemic lupus erythematosus presenting with syndrome of inappropriate antidiuretic hormone secretion and hemorrhagic gastroenteritis, emphasizing the need for early detection and intervention in such rare, rapidly progressive lupus flares.</p></abstract><trans-abstract xml:lang="ru"><p>Системная красная волчанка — мультисистемное аутоиммунное заболевание. Болезнь может проявляться различными клиническими симптомами и иногда представляет значительные диагностические трудности, обусловленные разнообразием клинических проявлений и их сочетаний. Вместе с тем ранняя диагностика играет ключевую роль в выживаемости пациентов.</p> <p>Мы представляем клинический случай 34-летнего мужчины без ранее установленного диагноза системной красной волчанки. Он поступил с выраженной гипонатриемией, обусловленной синдромом неадекватной секреции антидиуретического гормона, а также с проявлениями волчаночного энтерита; вскоре у пациента развился геморрагический гастрит. Несмотря на то что симптомы и лабораторные отклонения сохранялись в течение нескольких месяцев до госпитализации, диагноз системной красной волчанки не установили до развития жизнеугрожающих осложнений. Её заподозрили при поступлении в наше учреждение на основании сочетания симптомов, включая длительную лихорадку, судорожный синдром, цитопению и язвенные поражения слизистой оболочки полости рта. Компьютерная томография, демонстрировавшая типичную картину волчаночного энтерита, усилила подозрение на это заболевание. Последующая эхокардиография выявила эндокардит Либмана–Сакса с поражением аортального клапана. Серологические исследования подтвердили диагноз системной красной волчанки (антитела к ядерным антигенам 1:5120, положительные антитела к двуспиральной ДНК, гипокомплементемия). После проведения лечения и первоначального улучшения гипонатриемии у пациента развились повторные эпизоды кровотечения из верхних отделов желудочно-кишечного тракта. На 4-е сутки после госпитализации возникла пневмония, спустя несколько дней осложнившаяся дыхательной недостаточностью. Несмотря на интенсивную терапию глюкокортикоидами и антибиотиками, пациент скончался от дыхательной недостаточности и септического шока. Данные аутопсии подтвердили наличие осложнений, обусловленных системной красной волчанкой, включая васкулит и стерильные вегетации на створках аортального клапана.</p> <p>Данный клинический случай демонстрирует диагностические трудности системной красной волчанки, проявившейся синдромом неадекватной секреции антидиуретического гормона и геморрагическим гастроэнтеритом, и подчёркивает необходимость раннего выявления и своевременного лечения подобных редких и быстро прогрессирующих обострений заболевания.</p></trans-abstract><trans-abstract xml:lang="zh"><p>系统性红斑狼疮是一种多系统自身免疫性疾病。该病可表现为多种临床症状，有时由于临床表现的多样性和组合性，给诊断带来显著困难。然而，早期诊断对患者的生存率起着关键作用。</p> <p>我们报告一例34岁男性的临床病例，该患者先前未确诊系统性红斑狼疮。他因严重的低钠血症入院，该症状由抗利尿激素分泌不当综合征引起，并伴有狼疮性肠炎表现；患者很快发展为出血性胃炎。尽管住院前数月症状和实验室异常持续存在，但在危及生命的并发症发生之前，并未确诊系统性红斑狼疮。患者入院时，根据症状组合（包括长期发热、惊厥综合征、细胞减少和口腔粘膜溃疡性病变）怀疑本病。计算机断层扫描显示了典型的狼疮性肠炎图像，加强了对该疾病的怀疑。随后的超声心动图检查发现了Libman-Sacks心内膜炎伴主动脉瓣受累。血清学检查证实了系统性红斑狼疮的诊断（抗核抗体滴度1:5120，抗双链DNA抗体阳性，低补体血症）。经过治疗和低钠血症初步改善后，患者出现了上消化道反复出血发作。住院第4天出现肺炎，几天后并发呼吸功能不全。尽管进行了大剂量糖皮质激素和抗生素强化治疗，患者仍死于呼吸功能不全和感染性休克。尸检数据证实了由系统性红斑狼疮引起的并发症的存在，包括血管炎和主动脉瓣上的无菌性赘生物。</p> <p>本临床病例展示了系统性红斑狼疮的诊断困难，该病表现为抗利尿激素分泌不当综合征和出血性胃肠炎，并强调了早期发现和及时治疗此类罕见且快速进展的疾病急性发作的必要性。</p></trans-abstract><kwd-group xml:lang="en"><kwd>systemic lupus erythematosus</kwd><kwd>SIADH</kwd><kwd>lupus enteritis</kwd><kwd>hemorrhagic gastritis</kwd><kwd>Libman–Sacks endocarditis</kwd><kwd>hyponatremia</kwd><kwd>computer tomography</kwd><kwd>echocardiography</kwd><kwd>case report</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>системная красная волчанка</kwd><kwd>СНСАДГ</kwd><kwd>волчаночный энтерит</kwd><kwd>геморрагический гастрит</kwd><kwd>эндокардит Либмана–Сакса</kwd><kwd>гипонатриемия</kwd><kwd>компьютерная томография</kwd><kwd>эхокардиография</kwd><kwd>клинический случай</kwd></kwd-group><kwd-group xml:lang="zh"><kwd>系统性红斑狼疮</kwd><kwd>SIADH</kwd><kwd>狼疮性肠炎</kwd><kwd>出血性胃炎</kwd><kwd>Libman-Sacks心内膜炎</kwd><kwd>低钠血症</kwd><kwd>计算机断层扫描</kwd><kwd>超声心动图</kwd><kwd>临床病例</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Schattner A. Unusual presentations of systemic lupus erythematosus: a narrative review. The American Journal of Medicine. 2022;135(10):1178–1187. doi: 10.1016/j.amjmed.2022.05.020 EDN: GXARMY</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Lahita RG. The clinical presentation of systemic lupus erythematosus. In: Lahita RG, Tsokos GC, Buyon JP, Koike T, editors. Systemic lupus erythematosus. Fifth Edition. Academic Press; 2011. P. 525–539. ISBN: 978-0-12-374994-9</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>Roldan CA, Sibbitt WL, Qualls CR, et al. Libman-Sacks endocarditis and embolic cerebrovascular disease. JACC: Cardiovascular Imaging. 2013;6(9):973–983. doi: 10.1016/j.jcmg.2013.04.012</mixed-citation></ref><ref id="B4"><label>4.</label><mixed-citation>Ameer MA, Chaudhry H, Mushtaq J, et al. An overview of systemic lupus erythematosus (sle) pathogenesis, classification, and management. Cureus. 2022;14(10):e30330. doi: 10.7759/cureus.30330</mixed-citation></ref><ref id="B5"><label>5.</label><mixed-citation>Siegel CH, Sammaritano LR. Systemic lupus erythematosus. JAMA. 2024;331(17):1480. doi: 10.1001/jama.2024.2315 EDN: APHBLI</mixed-citation></ref><ref id="B6"><label>6.</label><mixed-citation>Yang Y, Jiang H, Wang C, et al. Clinical characteristics and prognoses of patients with systemic lupus erythematosus hospitalized for pulmonary infections. Frontiers in Medicine. 2021;8:732681. doi: 10.3389/fmed.2021.732681</mixed-citation></ref><ref id="B7"><label>7.</label><mixed-citation>Hara H, Hasegawa H, Iwanaga M, et al. A case of the syndrome of inappropriate secretion of antidiuretic hormone (SIADH) associated with lupus erythematosus in the central nervous system. CEN Case Reports. 2012;2(1):17–22. doi: 10.1007/s13730-012-0031-4</mixed-citation></ref><ref id="B8"><label>8.</label><mixed-citation>Lee IH, Cho S, Ahn DJ, Kim MK. Systemic lupus erythematosus presenting as hyponatremia-associated rhabdomyolysis. Medicine. 2021;100(39):e27390. doi: 10.1097/md.0000000000027390 EDN: HGNFZB</mixed-citation></ref><ref id="B9"><label>9.</label><mixed-citation>Yoshihara R, Tsuchiya H, Tsuzuki S, et al. Hypophysitis identified on initial presentation of systemic lupus erythematosus: a case report and review of the literature. Scandinavian Journal of Rheumatology. 2021;50(5):413–415. doi: 10.1080/03009742.2020.1861648 EDN: KAZEKR</mixed-citation></ref><ref id="B10"><label>10.</label><mixed-citation>Chai J, Wang Y, Mu R, Zhao J. Systemic lupus erythematosus involving the fornix column leading to hyponatremia: A case report. Beijing Da Xue Xue Bao Yi Xue Ban. 2024;56(6):1115–1118. doi: 10.19723/j.issn.1671-167x.2024.06.028</mixed-citation></ref><ref id="B11"><label>11.</label><mixed-citation>Yang N, Bhattacharyya S, Weinblatt M. Refractory syndrome of inappropriate secretion of antidiuretic hormone in systemic lupus erythematosus–associated hypophysitis. The Journal of Rheumatology. 2017;44(4):541–542. doi: 10.3899/jrheum.161313</mixed-citation></ref><ref id="B12"><label>12.</label><mixed-citation>Alrashidi FS. Severe hyponatremia from lupus-related syndrome of inappropriate antidiuresis (SIADH): a diagnostic challenge. Cureus. 2025;17(11):e96577. doi: 10.7759/cureus.96577</mixed-citation></ref><ref id="B13"><label>13.</label><mixed-citation>El-Badawy MA, El-Mahdi AR, El-Sherbiny DA, Bawady SAH. Hyponatremia in systemic lupus erythematosus patients: Relation to disease activity and fatigue. The Egyptian Rheumatologist. 2019;41(4):283–287. doi: 10.1016/j.ejr.2019.01.001</mixed-citation></ref><ref id="B14"><label>14.</label><mixed-citation>Yamany A, Behiry ME, Ahmed SA. Hyponatremia as an inflammatory marker of lupus activity is a fact or fad: a cross-sectional study. Open Access Rheumatology: Research and Reviews. 2020;12:29–34. doi: 10.2147/oarrr.s237168 EDN: JGQVZS</mixed-citation></ref><ref id="B15"><label>15.</label><mixed-citation>Cheng K, Hsu W. neuropsychiatric manifestations of systemic lupus erythematosus (NPSLE) and sle-related psychosis: epidemiology, pathogenesis, treatments. International Journal of Neuropsychopharmacology. 2025;28(Supp. 1):i349–i350. doi: 10.1093/ijnp/pyae059.623</mixed-citation></ref><ref id="B16"><label>16.</label><mixed-citation>Grant P, Ayuk J, Bouloux PM, et al. The diagnosis and management of inpatient hyponatraemia and SIADH. European Journal of Clinical Investigation. 2015;45(8):888–894. doi: 10.1111/eci.12465</mixed-citation></ref><ref id="B17"><label>17.</label><mixed-citation>Chen YL, Meng J, Li C. Intestinal perforation with systemic lupus erythematosus: A systematic review. Medicine. 2023;102(31):e34415. doi: 10.1097/md.0000000000034415 EDN: CENPIG</mixed-citation></ref><ref id="B18"><label>18.</label><mixed-citation>Gu Y, Zhu T, Wang Y, Xu H. Systemic lupus erythematosus with intestinal perforation: A case report. Experimental and Therapeutic Medicine. 2015;10(3):1234–1238. doi: 10.3892/etm.2015.2639</mixed-citation></ref><ref id="B19"><label>19.</label><mixed-citation>Al-Kandari A, Al-Alardati H, Sayadi H, et al. An unusual case of collagenous gastritis in a middle- aged woman with systemic lupus erythromatosis: a case report. Journal of Medical Case Reports. 2014;8(1):278. doi: 10.1186/1752-1947-8-278</mixed-citation></ref><ref id="B20"><label>20.</label><mixed-citation>Muñoz-Urbano M, Sangle S, D’Cruz DP. Lupus enteritis: a narrative review. Rheumatology. 2024;63(6):1494–1501. doi: 10.1093/rheumatology/kead689</mixed-citation></ref></ref-list></back></article>
