|Year : 2018 | Volume
| Issue : 6 | Page : 812-815
Type II enteropathy-associated t-cell lymphoma: A case report and literature review
L Zhao, Y Yang, Y Zhang
Department of Gastroenterology, West China Hospital of Sichuan University, Chengdu, China
|Date of Acceptance||25-Oct-2017|
|Date of Web Publication||11-Jun-2018|
Dr. Y Zhang
Department of Gastroenterology, West China Hospital of Sichuan University, No. 37, Guoxue Alley, Chengdu
Source of Support: None, Conflict of Interest: None
| Abstract|| |
Type II enteropathy-associated T-cell lymphoma (Type II EATL) is a rare peripheral T-cell lymphoma of the gastrointestinal tract. Here, we report a case of Type II EATL, in which the patient with repeated diarrhea was diagnosed as ulcerative colitis and amebic infection at the beginning, but her symptom had no improvement after therapy. The diagnosis of Type II EATL was confirmed by the repeated biopsies and immunohistochemistry. This case suggests that Type II EATL is difficult to diagnose due to lack of specific symptoms and endoscopic features. It reminds us that for patients with increased intraepithelial lymphocytes and thickened bowel wall, lymphoma should be highly suspected and biopsy should be repeated if necessary.
Keywords: Enteropathy-associated T-cell lymphoma, intraepithelial lymphocytes, repeated diarrhea, thickened bowel wall
|How to cite this article:|
Zhao L, Yang Y, Zhang Y. Type II enteropathy-associated t-cell lymphoma: A case report and literature review. Niger J Clin Pract 2018;21:812-5
| Introduction|| |
Enteropathy-associated T-cell lymphoma (EATL) is a rare peripheral T-cell lymphoma of the gastrointestinal tract, which can be divided into two types. Type I is closely associated with celiac disease, of which tumor cells are large, pleomorphic, and positive for CD3 and CD7 but negative for CD4, CD8, or CD56., Type II occurs sporadically, of which tumor cells are small to intermediate in size and displays CD8+, CD56+, and CD3+. The latter is rare in Western countries but has already been reported in Asia., However, it is difficult to diagnose due to lack of specific symptoms. The diagnosis of EATL was mainly made by laparotomy, and most of them had an emergency procedure because of perforation. Here, we reported a case of Type II EATL, which was diagnosed by endoscopy and repeat biopsy.
| Case Report|| |
A 47-year-old female came to our hospital with repeated diarrhea and weight loss for 3 months. She had watery diarrhea, 500–700 ml/day, without abdominal pain, hematochezia, or fever. She was healthy before, without a history of other diseases such as diabetes, hypertension, and medication exposures. Two months before presentation, she went to a local hospital. Colonoscopy showed scattered congestion, edema, and erosion in the rectum. Biopsies showed inflammatory necrosis, lots of lymphocytes, and plasma cells. Tests for infection were negative. Ulcerative colitis (UC) was diagnosed, and 5-aminosalicylic acid was given, but her symptoms had no change.
On admission, her physical examination was unremarkable. Laboratory tests showed normal erythrocyte sedimentation rate 31.0 mm/h, elevated C-reactive protein 16.6 mg/L, mild anemia (hemoglobin: 75 g/L), and albumin 23.7 g/L. Other laboratory results were shown in [Table 1]. Microscopic examination of stool showed occult blood +, pus cells +++, and leukocytes+++/HP. Endoscopy was repeated. Gastroscopy was normal. Colonoscopy revealed scattered congestion and erosion in the whole colon, especially in the rectum; and the ileocecal valve was deformed. The biopsies from rectum showed the infiltration of numerous small/medium lymphocytes in the lamina propria. Immunohistochemistry showed CD20 (+), CD43 (partial positive), CD3ε (−), CD5 (−), CD10 (−), CD23 (−), Cyclin D1 (−), Ki-67 (MIB-J, +, 3%), IgH, and TCRγ gene rearrangement did not show clonal amplification. Samples from the local hospital were checked again. The results also suggested numerous lymphocytes in the mucosal and submucosal. Immunohistochemistry showed CD3ε (partial positive), CD20 (partial positive), CD5 (−), CD10 (−), Cyclin D1 (−), Ki-67 (15%–20%). IgH, and TCRγ gene rearrangement did not show clonal amplification. Then, we went through her history again. She had her symptoms during a trip. We checked her stool again. Amebic cyst was found. Metronidazole was prescribed, but her symptom still remained no change.
|Table 1: The patient’s laboratory results of blood chemistry and tumor markers|
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Computed tomography enterography (CTE) was ordered and showed the walls of distal ileum, ileocecum, sigmoid colon, and rectum were unevenly thickened with enhancement, and the mesenteric lymph nodes were enlarged [Figure 1]. Small bowel endoscopy was performed and revealed normal mucosa of the small bowel. Colonoscopy was performed again, and multiple deep biopsies were taken from the involved bowel (rectum, sigmoid colon, and distal ileum) based on the results of CTE. The results revealed diffuse infiltration of small lymphoid cells which extended to the submucosal. Immunohistochemistry showed that CD8 (+), CD2 (+), CD7 (+), CD20 (some positive), CD56 (±), bc1-2 (+), Granzyme B (−), CD4 (−), CD5 (−), Cyclin D1 (−), CD10 (−), and Ki-67 (the positive rate was 15%) [Figure 2]. TCR-γ gene rearrangement showed clonal amplification peak. In situ hybridization for Epstein–Barr virus-encoded RNA was negative. Type II EATL was diagnosed. However, the patient refused chemotherapy and died 4 months later.
|Figure 2: Pathologic and immunohistochemistry pictures of the colon. (a and b) Diffuse infiltration of small lymphoid cells with slightly irregular nuclei extends to the submucosa. (c-g) Immunohistochemical stains for CD2, CD7, CD8, BCL-2, and CD56 were positive. (a: HE (Hematoxylin-eosin staining), ×200; b: HE, ×400)|
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| Discussion|| |
For lack of specific symptoms and endoscopic features, Type II EATL is difficult to diagnose. In our case, the patient was diagnosed as UC at the beginning, then amebic infection later. However, she had no typical clinical symptoms of UC (diarrhea with blood and mucus) or no typical colonoscopy features (diffuse inflammation in the colon). In addition, 5-ASA did not help her. The diagnosis of amoebic infection was based on the evidence of trophozoites, and metronidazole did not work. It was noticed that her biopsies always showed increased intraepithelial lymphocytes (IEL) and CTE showed bowel wall thickening. Papers were reviewed and it was found that many diseases can cause IEL increase such as celiac disease, EATL, cow's milk intolerance, food allergy, cryptosporidiosis, and giardiasis.,, The diseases contributing to the walls of bowel thickening include inflammatory bowel disease, celiac disease, tumors (adenocarcinoma, carcinoid tumor, lymphoma, and gastrointestinal stromal tumor). Celiac disease was ruled out, and lymphoma was highly suspected. Then, multiple deep biopsies were taken from the involved colon based on the results of CTE.
The diagnosis of Type II EATL might pose a challenge because of the features of its pathology. Studies suggested that the neoplasm of Type II EATL could be divided into three zones: central tumor zone, peripheral zone, and intraepithelial lymphocytosis zone (>30 IELs per 100 epithelial cells)., Monotonous population of lymphomatous cells, which are small sized or medium sized with the slightly larger nuclei and the lighter staining of the chromatin, could be found in the central zone and peripheral zone. While the character of the intraepithelial lymphocytosis zone is the infiltration of small or normal lymphocytes in the epithelium, the lymphocytes have round nuclei and fairly condensed chromatin., This zone could be either continuous or discontinuous with the peripheral zone and sometimes far away from the edge of the tumor zone. In addition, the immunophenotype of IEL in this zone can be either identical to or different from the lymphomatous cells., Therefore, the increased IEL and the phenotypic variation of IEL might potentially create diagnostic confusion if the physicians happened to biopsy at the intraepithelial lymphocytosis zone. Repeat biopsy at different places may solve this question.
| Conclusion|| |
The diagnosis of Type II EATL is difficult due to lack of typical symptoms and specific examination results. This case reminds us that for patients with increased IEL and thickened bowel wall, lymphoma should be highly suspected and biopsy should be repeated if necessary.
Declaration of patient consent
The authors certify that they have obtained all appropriate patient consent forms. In the form the patient(s) has/have given his/her/their consent for his/her/their images and other clinical information to be reported in the journal. The patients understand that their names and initials will not be published and due efforts will be made to conceal their identity, but anonymity cannot be guaranteed.
Financial support and sponsorship
Conflicts of interest
There are no conflicts of interest.
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[Figure 1], [Figure 2]