Abstract:
BACKGROUND:Chronic active Epstein-Barr virus infection (CAEBV) is defined as Epstein-Barr virus (EBV)-positive T/NK cell-related neoplasia, and its major clinical symptom is systemic inflammation presenting as infectious mononucleocytosis, whereas enteritis and diarrhea are minor clinical symptoms. The complex mixture of tumorigenic processes of EBV-positive cells and physical symptoms of systemic inflammatory disease constitutes the varied phenotypes of CAEBV. Herein, we describe a case of CAEBV that was initially diagnosed as Crohn's disease (CD) based on ileal ulcers and clinical symptoms of enteritis. CASE PRESENTATION:A 19-year-old woman complained of abdominal pain and fever. Blood examination showed normal blood cell counts without atypical lymphocyte but detected modest inflammation, hypoalbuminemia, slight liver dysfunction, and evidence of past EBV infection. The esophagogastroduodenoscopic findings were normal. However, colonoscopy revealed a few small ulcers in the terminal ileum. The jejunum and ileum also exhibited various forms of ulcers, exhibiting a cobblestone appearance, on capsule endoscopy. Based on these clinical findings, she was strongly suspected with CD. In the course of treatment by steroid and biologics for refractory enteritis, skin ulcers appeared about 50 months after her initial hospital visit. Immunohistology of her skin biopsy revealed proliferation of EBV-encoded small RNA (EBER)-positive atypical lymphocytes. We retrospectively assessed her previous ileal ulcer biopsy before treatment and found many EBER-positive lymphocytes. Blood EBV DNA was also positive. Therefore, she was diagnosed with extranodal NK/T-cell lymphoma with CAEBV-related enteritis rather than CD. She was treated with cyclosporine and prednisolone combination therapy for CAEBV-related systemic inflammation and chemotherapy for malignant lymphoma. Unfortunately, her disease continued to progress, leading to multiple organ failure and death at the age of 23 years. CONCLUSION:Clinicians need to remember the possibility of CAEBV as a differential diagnosis of refractory enteritis. Enteritis with intestinal ulcer is a rare symptom of CAEBV, and it is impossible to acquire a definitive diagnosis by ulcer morphology only. In cases where the possibility of CAEBV remains, tissue EBVR expression should be checked by in situ hybridization and blood EBV DNA.
journal_name
BMC Gastroenteroljournal_title
BMC gastroenterologyauthors
Aihara Y,Moriya K,Shimozato N,Nagamatsu S,Kobayashi S,Uejima M,Matsuo H,Ishida E,Yagi H,Nakatani T,Yoshiji H,Kikuchi Edoi
10.1186/s12876-020-01589-1subject
Has Abstractpub_date
2021-01-06 00:00:00pages
6issue
1issn
1471-230Xpii
10.1186/s12876-020-01589-1journal_volume
21pub_type
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