Use of PEG-asparaginase in monomorphic epitheliotropic intestinal T-cell lymphoma, a disease with diagnostic and therapeutic challenges

Surgical management of monomorphic epitheliotropic intestinal T-cell lymphoma followed by chemotherapy and stem-cell transplant: A case report and review of the literature

BACKGROUND

Monomorphic epitheliotropic intestinal T-cell lymphoma (MEITL) is a rare and rapidly progressive intestinal T-cell non-Hodgkin lymphoma associated with a very poor prognosis and a median survival of 7 mo. Advances in the identification of MEITL over the last two decades have led to its recognition as a separate entity. MEITL patients, predominantly male, typically present with vague and nonspecific symptoms and diagnosis is predominantly confirmed at laparotomy. Currently, there are no standardized treatment protocols, and the optimal therapy remains unclear.

CASE SUMMARY

We report a case of MEITL that was initially considered to be gastrointestinal stromal tumor (GIST) and Imatinib was administered for one cycle. The 62-year-old man presented with abdominal pain, abdominal distension, and weight loss of 20 pounds. Within 2 wk, the size of the mass considerably increased on computed tomography scans. The patient underwent surgery followed by chemotherapy with CHOP (cyclophosphamide, doxorubicin, vincristine, and prednisone) and stem-cell transplant. A correct diagnosis of MEITL was established based on postoperative pathology. Immunophenotypically, the neoplastic cells fulfilled the diagnostic criteria for MEITL as they were CD3⁺, CD4⁺, CD8⁺, CD56⁺, and TIA-1⁺.

CONCLUSION

Given that MEITL has no predisposing factor and presents with vague symptoms with rapid progression, the concomitant presence of abdominal symptoms and B symptoms (weight loss, fever, and night sweats) with hypoalbuminemia, anemia, low lymphocytic count and endoscopic findings of diffuse infiltrating type lesions should alert physicians to this rare disease, especially when it comes to Asian patients. Immediate laparotomy should then be carried out followed by chemotherapy and stem-cell transplant.

Pegylated liposomal doxorubicin (PLD)-containing regimen as a novel treatment of monomorphic epithelial intestinal T-cell lymphoma (MEITL): A case report and review of literature

INTRODUCTION

Monomorphic intestinal T-cell lymphoma (MEITL) is a rare, aggressive peripheral T-cell lymphoma that arises from intestinal epithelial lymphocytes. Currently, MEITL lacks standard treatment options. Under the current treatment regimen, the median survival time for patients is only 7 months. Chemotherapy followed by hematopoietic stem cell transplantation may improve patient outcomes. New anti-lymphoma drugs, including chidamide and PEG-asparaginase, are being tested against MEITL. To our knowledge, there are currently no data on the pegylated liposomal doxorubicin (PLD) regimen for MEITL therapy.Patient concerns, diagnosis and interventions: We report the case of a 54-year-old patient diagnosed with MEITL who presented with abdominal pain and was treated with a cyclophosphamide, doxorubicin, vincristine, prednisone, etoposide regimen containing PLD.

OUTCOMES

After 15 months of follow-up, the patient is currently alive and disease free. The application of doxorubicin liposomes in chemotherapy regimens may be a new way to treat MEITL.

REVIEW

We searched the literature on MEITL and selected 52 case reports. We summarized the clinical characteristics and treatment of 53 patients (including the current patient).

CONCLUSION

It highlights 2 important clinical findings. First, for patients with MEITL treated with the cyclophosphamide, doxorubicin, vincristine, prednisone, etoposide regimen, PLD has fewer adverse reactions and better long-term survival than doxorubicin. Second, an early diagnosis is necessary for prompt treatment. We believe that this manuscript will be valuable to all the researchers who are interested in.

Cellular Origins and Pathogenesis of Gastrointestinal NK- and T-Cell Lymphoproliferative Disorders

The intestinal immune system, which must ensure appropriate immune responses to both pathogens and commensal microflora, comprises innate lymphoid cells and various T-cell subsets, including intra-epithelial lymphocytes (IELs). An example of innate lymphoid cells is natural killer cells, which may be classified into tissue-resident, CD56bright NK-cells that serve a regulatory function and more mature, circulating CD56dim NK-cells with effector cytolytic properties. CD56bright NK-cells in the gastrointestinal tract give rise to indolent NK-cell enteropathy and lymphomatoid gastropathy, as well as the aggressive extranodal NK/T cell lymphoma, the latter following activation by EBV infection and neoplastic transformation. Conventional CD4+ TCRαβ+ and CD8αβ+ TCRαβ+ T-cells are located in the lamina propria and the intraepithelial compartment of intestinal mucosa as type 'a' IELs. They are the putative cells of origin for CD4+ and CD8+ indolent T-cell lymphoproliferative disorders of the gastrointestinal tract and intestinal T-cell lymphoma, NOS. In addition to such conventional T-cells, there are non-conventional T-cells in the intra-epithelial compartment that express CD8αα and innate lymphoid cells that lack TCRs. The central feature of type 'b' IELs is the expression of CD8αα homodimers, seen in monomorphic epitheliotropic intestinal T-cell lymphoma (MEITL), which primarily arises from both CD8αα+ TCRαβ+ and CD8αα+ TCRγδ+ IELs. EATL is the other epitheliotropic T-cell lymphoma in the GI tract, a subset of which arises from the expansion and reprograming of intracytoplasmic CD3+ innate lymphoid cells, driven by IL15 and mutations of the JAK-STAT pathway.

Small bowel lymphoma: clinical update and challenges for the gastroenterologist

PURPOSE OF REVIEW

The diagnosis of small bowel lymphoma (SBL) can be challenging, as they are very rare and also have a varied presentation. In this review, we aim to provide a broad overview of the types of SBL and also about the various modalities used for their diagnosis. We also discuss the overview of treatment strategies for a gastroenterologist.

RECENT FINDINGS

Small bowel capsule endoscopy (SBCE) and devise-assisted enteroscopy (DAE) has revolutionized the way we investigate the small bowel. DAE also makes it possible to obtain histological samples for further characterization of SBL. This has led to a significant improvement in diagnosis and management of the disease in conjunction with cross-sectional imagining.

SUMMARY

The diagnosis and management of small bowel lymphoma remains challenging despite the development of newer techniques such as SBCE and DAE. The current available diagnostic modalities have limitations; in the absence of a gold standard, the current investigative modalities compliment each other in reaching the final diagnosis.

PEG-Asparaginase Single-Agent Rescue in an Advanced Case of Monomorphic Epitheliotropic Intestinal T Cell Lymphoma

PURPOSE

MEITL is a very rare and highly aggressive peripheral T cell lymphoma with poor prognosis and for which there is no standard treatment. Treatment options for patients patients with relapsed/refractory disease are scarce and the choice of an appropriate rescue still represents an unmet need.

METHODS

Here, we report the case of a 65-year-old woman affected by MEITL, progressing after initial treatment with an anthracycline-based chemotherapy and surgery, who received single-agent PEG-asparaginase salvage therapy at our institution.

RESULTS

PEG-asparaginase single-agent rescue proved to be rapidly effective in controlling the disease and its associated paraneoplastic features. Nevertheless, toxicity was high and the patient died due to a treatment-related complication.

CONCLUSION

The case we described brings new evidences on the effectiveness of PEG-asparaginase therapy in MEITL patients. Whether PEG-asparaginase should be included in the treatment course of MEITL patients could be the subject of future studies.

Monomorphic epitheliotropic intestinal T-cell lymphoma presenting as melena with long-term survival: A case report and review of literature

BACKGROUND

Monomorphic epitheliotropic intestinal T-cell lymphoma (MEITL) is a rare primary intestinal T-cell lymphoma, previously known as enteropathy-associated T-cell lymphoma type II. MEITL is an aggressive T-cell lymphoma with a poor prognosis and high mortality rate. The known major complications of MEITL are intestinal perforation and obstruction. Here, we present a case of MEITL that was diagnosed following upper gastrointestinal bleeding from an ulcerative duodenal lesion, with recurrence-free survival for 5 years.

CASE SUMMARY

A 68-year-old female was admitted to our hospital with melena and mild anemia. An urgent esophagogastroduodenoscopy (EGD) revealed bleeding from an ulcerative lesion in the transverse part of the duodenum, for which hemostatic treatment was performed. MEITL was diagnosed following repeated biopsies of the lesion, and cyclophosphamide, doxorubicin, vincristine, and prednisone (CHOP) chemotherapy was administered. She achieved complete remission after eight full cycles of CHOP therapy. At the last follow-up examination, EGD revealed a scarred ulcer and ¹⁸Fluorodeoxyglucose (¹⁸FDG) positron emission tomography/computed tomography showed no abnormal FDG accumulation. The patient has been in complete remission for 68 mo after initial diagnosis.

CONCLUSION

To rule out MEITL, it is important to carefully perform histological examination when bleeding from a duodenal ulcer is observed.

Small bowel T-cell lymphoma: a MEITL-ing diagnosis

Monomorphic epitheliotropic intestinal T-cell lymphoma (MEITL), previously known as Type-II enteropathy-associated T-cell lymphoma (EATL), is a rare subset of relatively aggressive lymphoma with a poor prognosis. We present a case of a previously healthy 59-year-old male with a 2-week history of abdominal distention who was found to have a non-bleeding ulcerated segment in the proximal jejunum secondary to MEITL. This exceedingly rare type of lymphoma usually presents with non-specific symptoms and can be challenging to diagnose. Our case demonstrates the importance of understanding the endoscopic and histological findings to allow the prompt diagnosis and treatment of this aggressive disease.

Various Endoscopic Features in Monomorphic Epitheliotropic Intestinal T-Cell Lymphoma

A 77-year-old female who had an acute severe abdominal pain was taken to the emergency room in the previous hospital. CT scans showed jejunum and ileum wall thickening and fatty deposits around the small intestinal tract, and gastrointestinal perforation could not be ruled out. By using single anal and oral balloon endoscopy, we observed mild edema with petechial erythema, shallow erosions with edematous mucosa and ulcers with surrounded disrupted villous structures at the jejunum and ileum. Histological analysis revealed atypical lymphocytes infiltrating the small intestinal mucosa demonstrating intraepithelial lymphocytosis. Immunohistochemical staining revealed that CD3, CD7, and CD56 staining was positive, and CD4, CD5, and CD8 staining was negative in infiltrated lymphocytes. We made the diagnosis of monomorphic epitheliotropic intestinal T-cell lymphoma (MEITL) with the combination of HE staining and IHC. PET-CT showed abnormal uptake in irregular wall thickening of the small intestine, lymph nodes, ribs, spine and pelvic bone. She was treated with chemotherapy (etoposide, prednisolone, oncovin, cyclophosphamide, hydroxydaunorubicin) and is still alive 1 year after the diagnosis. We reported the various endoscopic findings in the same MEITL patient by using single balloon endoscopy. We also summarized endoscopic characteristics of MEITL patients.

Incidental Diagnosis of Monomorphic Epitheliotropic Intestinal T-Cell Lymphoma: A Case Report

Monomorphic epitheliotropic intestinal T-cell lymphoma (MEITL) is a rare, rapidly progressive, primary intestinal T-cell lymphoma. It is most commonly seen in the Asian and Hispanic populations and is usually not related to celiac disease, unlike type I enteropathy associated T-cell lymphoma. The most common site of occurrence is the small intestine. Patients usually present during the advanced stage of disease with clinical features of intestinal perforation or obstruction. The late clinical presentation and lack of targeted therapy are factors contributing to its poor prognosis. Here, we are presenting the case of a patient who initially came to the hospital for a urinary tract infection. As his abdominal CT scan showed abdominal wall thickening, he underwent further workup which revealed the diagnosis of MEITL.