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HOME > Clin Endosc > Volume 53(3); 2020 > Article
Brief Report Hepatosplenic T-Cell Lymphoma Diagnosed by Endoscopic Ultrasound-Guided Fine-Needle Biopsy
Yoshiaki Shibata1,orcid, Mayuko Miyamoto1orcid, Wataru Shinomiya1orcid, Kumiko Kirita1orcid, Sayuri Motomura2orcid, Hiroko Hidai2orcid, Takeshi Hagino2orcid, Yuji Ito3orcid
Clinical Endoscopy 2020;53(3):374-376.
DOI: https://doi.org/10.5946/ce.2019.192
Published online: February 28, 2020

1Division of Gastroenterology, Tama-Hokubu Medical Center, Tokyo, Japan

2Division of Hematology, Tama-Hokubu Medical Center, Tokyo, Japan

3Division of Pathology, Tama-Hokubu Medical Center, Tokyo, Japan

Correspondence: Yoshiaki Shibata Division of Gastroenterology, Tama-Hokubu Medical Center, Tokyo Metropolitan Health and Medical Treatment Corporation, 1-7-1 Aobacho, Higashimurayamashi, Tokyo 189-0002, Japan Tel: +81-42-396-3811, Fax: +81-42-396-3076, E-mail: yshibatathk@gmail.com
• Received: September 18, 2019   • Revised: January 19, 2002   • Accepted: January 20, 2020

Copyright © 2020 Korean Society of Gastrointestinal Endoscopy

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Primary splenic malignant lymphoma is very rare, and few reports have examined the diagnostic utility of endoscopic ultrasound-guided fine-needle biopsy (EUS-FNB) for this disease [1-3]. Here we report an extremely rare case of hepatosplenic T-cell lymphoma (HSTCL). Although HSTCL has been previously documented in patients with inflammatory bowel disease [4,5], this is the first report of it being diagnosed by splenic biopsy using EUS-FNB. HSTCL is an extranodal cytotoxic T-cell lymphoma that is located in the liver or spleen, and easily invades the bone marrow; it is characterized by marked hepatosplenomegaly and B symptoms. This disease is more common in young men, and has an aggressive course and poor prognosis [6,7].
The patient was a 44-year-old woman who was admitted to our hospital with complaints of fever and abdominal pain. Hematologic examination revealed thrombocytopenia, a prolonged blood coagulation time, and an increased serum lactate dehydrogenase level. The platelet count was 73,000/mm3 (normal range, 158,000–348,000/mm3), the international normalized ratio of prothrombin time was 1.37 (normal range, 0.85–1.15), the activated partial prothrombin time was 47.1 sec (normal range, 20.0–40.0 sec), and the serum lactate dehydrogenase level was 593 IU/L (normal range, 124–222 IU/L). Abdominal computed tomography (CT) showed marked splenomegaly (Fig. 1A). 18F-Fluorodeoxyglucose (F-FDG) positron emission tomography/CT showed preferential accumulation of 18F-FDG in the spleen (Fig. 1B), as well as in the liver and bone marrow, but there was no accumulation in the lymph nodes. EUS revealed that the spleen was markedly enlarged, with small isoechoic to hypoechoic areas throughout, but no noticeable mass formation was observed (Fig. 1C). The decision was made to perform EUSFNB to confirm a suspected diagnosis of splenic lymphoma. Written informed consent was obtained from the patient after providing a detailed explanation of the procedure. The splenic lesion was punctured transgastrically (Fig. 1C) and the tissue was collected under slight negative pressure using the slow-pull method by slowly withdrawing the stylet [8,9]. Five punctures were performed using a 22-gauge reverse bevel FNB needle (EchoTip ProCore; Cook Medical, Bloomington, IN, USA) to obtain tissue for immunohistochemistry analysis. There were no procedure-related adverse events. Histopathologic analysis showed diffuse infiltration of medium-sized atypical lymphocytes, with clear cytoplasm, into the sinusoids of the spleen (Fig. 2A). Immunohistochemistry analysis revealed markedly abnormal lymphoid infiltrates in the splenic sinuses that were positive for CD3 (Fig. 2B) and negative for CD4 (Fig. 2C), CD8 (Fig. 2D), and CD20 (Fig. 2E), which is characteristic of HSTCL. The results of bone marrow analysis using flow cytometry also supported this diagnosis, and this case was found to be of the αβ T-cell receptor type (with the αβ type being less dominant than the γδ type) [6,7]. Using a 22-gauge core biopsy needle allowed the collection of a tissue sample with a length of 579.4 µm, which was sufficient to meet the fifth criterion (sufficient material for good quality histological interpretation) in the standard microscopic scoring system proposed by Gerke et al. [10]. A 19-gauge core biopsy needle is useful for diagnosis of splenic malignant lymphoma by EUS-FNB because a large amount of tissue can be collected with a small number of punctures [2,3], but procedures involving an EUS scope sometimes require a strong upward angle and rightward torque to detect and puncture splenic lesions. A 22-gauge biopsy needle is more flexible than a 19-gauge needle, therefore less resistance is encountered when attaching the needle and puncturing the target in such situations. This makes it easier for less experienced operators to control the needle and puncture the target. Therefore, we opted to use a 22-gauge core biopsy needle for splenic biopsy in this case.
The spleen is the primary site of non-Hodgkin’s lymphoma in only 1%–3% of the cases [6,7]. Furthermore, HSTCL accounts for less than 1% of all non-Hodgkin’s lymphomas [6,7]. Interestingly, 10% of the known cases of HSTCL have been documented in patients with inflammatory bowel disease, such as Crohn’s disease or ulcerative colitis [4,5]. There have also been some reports of cases where immunosuppressants, such as anti-tumor necrosis factor (TNF) and thiopurine, have been used in combination [4,5]. Concomitant use of thiopurine and anti-TNF is thought to cause bone marrow suppression, resulting in an inability to selectively control cell proliferation and development of HSTCL via a genetic mechanism [4]. Our patient did not have a history of inflammatory bowel disease or immunosuppressive therapy. Immunosuppressants such as anti-TNF and thiopurine are now widely used in inflammatory bowel disease, and patients receiving these agents should be monitored carefully for development of HSTCL. Splenic biopsy with EUS using a core biopsy needle, which is a minimally invasive procedure, may aid in early diagnosis of HSTCL in patients with inflammatory bowel disease receiving immunosuppressive therapy.
The authors thank Dr. Shigeo Mori, Professor Emeritus at The University of Tokyo, for advice on the pathology of HSTCL.
Fig. 1.
Abdominal computed tomography (CT), 18F-Fluorodeoxyglucose (F-FDG) positron emission tomography (PET)/CT, and endoscopic ultrasound images for a patient with hepatosplenic T-cell lymphoma. (A) Abdominal CT scan showing marked splenomegaly. (B) 18F-FDG PET/CT scan showing abnormal accumulation of FDG in the spleen. (C) Endoscopic ultrasound images showing marked splenomegaly but no noticeable mass formation. The spleen was punctured by a 22-gauge biopsy needle.
ce-2019-192f1.jpg
Fig. 2.
Histologic features in a patient with hepatosplenic T-cell lymphoma. (A) High power view (×400) with hematoxylin and eosin staining shows diffuse infiltration of atypical lymphocytes into the sinusoids of the spleen. Immunohistochemical analysis at ×400 showing atypical lymphocytes that are CD3-positive (B) but CD4-negative (C), CD8-negative (D), and CD20-negative (E).
ce-2019-192f2.jpg
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        Hepatosplenic T-Cell Lymphoma Diagnosed by Endoscopic Ultrasound-Guided Fine-Needle Biopsy
        Clin Endosc. 2020;53(3):374-376.   Published online February 28, 2020
        DOI: https://doi.org/10.5946/ce.2019.192
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      Hepatosplenic T-Cell Lymphoma Diagnosed by Endoscopic Ultrasound-Guided Fine-Needle Biopsy
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      Fig. 1. Abdominal computed tomography (CT), 18F-Fluorodeoxyglucose (F-FDG) positron emission tomography (PET)/CT, and endoscopic ultrasound images for a patient with hepatosplenic T-cell lymphoma. (A) Abdominal CT scan showing marked splenomegaly. (B) 18F-FDG PET/CT scan showing abnormal accumulation of FDG in the spleen. (C) Endoscopic ultrasound images showing marked splenomegaly but no noticeable mass formation. The spleen was punctured by a 22-gauge biopsy needle.
      Fig. 2. Histologic features in a patient with hepatosplenic T-cell lymphoma. (A) High power view (×400) with hematoxylin and eosin staining shows diffuse infiltration of atypical lymphocytes into the sinusoids of the spleen. Immunohistochemical analysis at ×400 showing atypical lymphocytes that are CD3-positive (B) but CD4-negative (C), CD8-negative (D), and CD20-negative (E).

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      Hepatosplenic T-Cell Lymphoma Diagnosed by Endoscopic Ultrasound-Guided Fine-Needle Biopsy
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