Peripheral T-cell lymphomas: initial features, natural history, and prognostic factors in a series of 174 patients diagnosed according to the R.E.A.L. Classification

The CNS relapse in T-cell lymphoma index predicts CNS relapse in patients with T- and NK-cell lymphomas

ABSTRACT

Little is known about risk factors for central nervous system (CNS) relapse in mature T-cell and natural killer cell neoplasms (MTNKNs). We aimed to describe the clinical epidemiology of CNS relapse in patients with MTNKN and developed the CNS relapse In T-cell lymphoma Index (CITI) to predict patients at the highest risk of CNS relapse. We reviewed data from 135 patients with MTNKN and CNS relapse from 19 North American institutions. After exclusion of leukemic and most cutaneous forms of MTNKNs, patients were pooled with non-CNS relapse control patients from a single institution to create a CNS relapse-enriched training set. Using a complete case analysis (n = 182), including 91 with CNS relapse, we applied a least absolute shrinkage and selection operator Cox regression model to select weighted clinicopathologic variables for the CITI score, which we validated in an external cohort from the Swedish Lymphoma Registry (n = 566). CNS relapse was most frequently observed in patients with peripheral T-cell lymphoma, not otherwise specified (25%). Median time to CNS relapse and median overall survival after CNS relapse were 8.0 and 4.7 months, respectively. We calculated unique CITI risk scores for individual training set patients and stratified them into risk terciles. Validation set patients with low-risk (n = 158) and high-risk (n = 188) CITI scores had a 10-year cumulative risk of CNS relapse of 2.2% and 13.4%, respectively (hazard ratio, 5.24; 95% confidence interval, 1.50-18.26; P = .018). We developed an open-access web-based CITI calculator (https://redcap.link/citicalc) to provide an easy tool for clinical practice. The CITI score is a validated model to predict patients with MTNKN at the highest risk of developing CNS relapse.

Prognostic Significance Of Sequential 18f-fdg Pet/Ct During Frontline Treatment Of Peripheral T Cell Lymphomas

BACKGROUND/AIMS

The prognostic significance of 18F-fluorodeoxyglucose (FDG)-positron emission tomography-computed tomography (PET/CT) in peripheral T-cell lymphomas (PTCLs) are controversial. We explored the prognostic impact of sequential 18F-FDG PET/CT during frontline chemotherapy of patients with PTCLs.

METHODS

In total, 143 patients with newly diagnosed PTCLs were included. Sequential 18F-FDG PET/CTs were performed at the time of diagnosis, during chemotherapy, and at the end of chemotherapy. The baseline total metabolic tumor volume (TMTV) was calculated using the the standard uptake value with a threshold method of 2.5.

RESULTS

A baseline TMTV of 457.0 cm3 was used to categorize patients into high and low TMTV groups. Patients with a requirehigh TMTV had shorter progression-free survival (PFS) and overall survival (OS) than those with a low TMTV (PFS, 9.8 vs. 26.5 mo, p = 0.043; OS, 18.9 vs. 71.2 mo, p = 0.004). The interim 18F-FDG PET/CT response score was recorded as 1, 2-3, and 4-5 according to the Deauville criteria. The PFS and OS showed significant differences according to the interim 18F-FDG PET/CT response score (PFS, 120.7 vs. 34.1 vs. 5.1 mo, p < 0.001; OS, not reached vs. 61.1 mo vs. 12.1 mo, p < 0.001).

CONCLUSION

The interim PET/CT response based on visual assessment predicts disease progression and survival outcome in PTCLs. A high baseline TMTV is associated with a poor response to anthracycline-based chemotherapy in PTCLs. However, TMTV was not an independent predictor for PFS in the multivariate analysis.

Central Nervous System Relapse in T and NK cell Lymphomas

PURPOSE OF REVIEW

T and NK cell lymphomas are relatively rare and heterogeneous forms of non-Hodgkin lymphoma that are associated with high rates of mortality. Central nervous system relapse carries significant morbidity, though management is largely extrapolated from literature in B cell neoplasms. As such, outcomes for central nervous system involvement in T/NK cell lymphomas are dismal with no standard of care. In this review, we discuss the epidemiology of central nervous system relapse in T/NK cell lymphomas and critically analyze available literature regarding prophylaxis and treatment.

RECENT FINDINGS

Retrospective studies of central nervous system involvement in T/NK cell lymphomas have been limited by small sample sizes and heterogeneity of subtypes, though sites of extranodal involvement and disease subtypes are consistently reported as risk factors. Compelling evidence for the use of central nervous system-directed prophylactic therapy has not yet been established, though recent reports of central nervous system activity with novel agents may suggest promising therapeutic options. The overall rarity of T and NK cell lymphomas has precluded adequate study of prophylaxis and treatment of central nervous system relapse. Collaborative efforts are needed to better define strategies to address CNS disease in T/NK cell lymphomas. These should involve the use of targeted agents, which may hold an advantage over traditional cytotoxic drugs.

Central Nervous System Progression/Relapse in Mature T- and NK-Cell Lymphomas

Non-Hodgkin lymphomas (NHL) are cancers of mature B-, T-, and NK-cells which display marked biological heterogeneity between different subtypes. Mature T- and NK-cell neoplasms are an often-aggressive subgroup of NHL and make up approximately 15% of all NHL. Long-term follow up studies have demonstrated that patients with relapsed/refractory disease have dismal outcomes; in particular, secondary central nervous system (CNS) involvement is associated with higher mortality, though it remains controversial whether this independently confers worse outcomes or if it simply reflects more aggressive systemic disease. Possible risk factors predictive of CNS involvement, such as an elevated lactate dehydrogenase and more than two sites of extranodal involvement, may suggest the latter, though several studies have suggested that discrete sites of anatomic involvement or tumor histology may be independent risk factors as well. Ultimately, small retrospective case series form the basis of our understanding of this rare but devastating event but have not yet demonstrated a consistent benefit of CNS-directed prophylaxis in preventing this outcome. Nonetheless, ongoing efforts are working to establish the epidemiology of CNS progression/relapse in mature T- and NK-cell lymphomas with the goal of identifying clinicopathologic risk factors, which may potentially help discern which patients may benefit from CNS-directed prophylactic therapy or more aggressive systemic therapy.

T-Cell Lymphomas, Version 2.2022, NCCN Clinical Practice Guidelines in Oncology

Peripheral T-cell lymphomas (PTCLs) are a heterogeneous group of lymphoproliferative disorders arising from mature T cells, accounting for about 10% of non-Hodgkin lymphomas. PTCL-not otherwise specified is the most common subtype, followed by angioimmunoblastic T-cell lymphoma, anaplastic large cell lymphoma, anaplastic lymphoma kinase-positive, anaplastic large cell lymphoma, anaplastic lymphoma kinase-negative, and enteropathy-associated T-cell lymphoma. This discussion section focuses on the diagnosis and treatment of PTCLs as outlined in the NCCN Guidelines for T-Cell Lymphomas.

Comparison of first-line treatments of peripheral T-cell lymphoma according to regimen: A systematic review and meta-analysis

Peripheral T-cell lymphomas (PTCLs) are known to have an aggressive clinical course and grave prognosis. Several recommended first-line treatment regimens are available, but identification of the superior treatment remain elusive. We conducted a systematic review and meta-analysis to determine which study-level factors and group of regimens affect survival outcomes. The MEDLINE, Embase, and Cochrane databases were searched from inception to January 2021, and phase II or III clinical studies evaluating the efficacy of chemotherapy regimens were included. Random effects models were used to estimate 3-year overall survival rate, complete remission rate, and subgroup differences. Meta-regressions were carried out with adjustments for relevant covariates. Overall, 34 cohorts from 28 studies comprising 1424 PTCL patients were included in the pooled analysis. Chemotherapy regimens were divided into four groups: cyclophosphamide, doxorubicin, vincristine, prednisone (CHOP), CHOP plus etoposide, gemcitabine-based, and others. The pooled 3-year overall survival rate was 0.49 (95% confidence interval [CI] 0.43-0.54) for CHOP, 0.61 (95% CI 0.52-0.70) for CHOP plus etoposide, 0.39 (95% CI 0.30-0.47) for gemcitabine-based, and 0.61 (95% CI 0.44-0.78) for others. CHOP plus etoposide was significantly better than CHOP, with the latter used as a reference (coefficient of 0.11; p = 0.035), with adjustment for the proportion of International Prognostic Index score 4-5 in meta-regression analysis. Although grossly divided groups were pooled and analyzed, among four regimen groups for frontline PTCL treatment CHOP plus etoposide showed better survival than CHOP.

Primary and secondary central nervous system mature T- and NK-cell lymphomas

Primary central nervous system (CNS) mature T- and NK-cell lymphomas are rare, only comprising 2% to 3% of all primary CNS lymphomas. Among them, peripheral T-cell lymphoma, not otherwise specified, anaplastic large cell lymphoma (ALCL), and extranodal NK/T-cell lymphoma (ENKTL) are the commonly reported histological subtypes. Secondary CNS T-cell lymphoma generally affects about 5% of patients with T- or NK-cell lymphoma, with some exceptions. Acute and lymphomatous subtypes of adult T-cell leukemia/lymphoma (ATLL) have high risk of CNS progression, may affect up to 20% of patients; ALK-positive ALCL with extranodal involvement >1 also has high risk of CNS progression. However, the impact and the optimal methodology of CNS prophylaxis remain unclear in systemic T-cell lymphomas. There are little data on the treatment strategy of primary and secondary CNS T-cell lymphoma. Treatment strategy derived from B-cell CNS primary lymphoma is generally used; this includes induction therapy with high-dose methotrexate-based regimens, followed by high-dose chemotherapy with autologous stem cell transplant in fit patients. There are unmet needs for patients who are not fit for intensive chemotherapy. The prognosis after CNS progression in T-cell lymphoma is dismal with the median overall survival of less than 1 year. New agents targeting T-cell lymphomas are emerging and should be tested in patients with mature T- and NK-cell lymphoma who suffer from CNS involvement.

Combined Modality Management of Sinonasal Anaplastic Lymphoma Kinase Negative Anaplastic Large Cell Lymphoma in a Geriatric Patient-Report of a Rare Case

Sinonasal anaplastic lymphoma kinase(ALK)-negative anaplastic large cell lymphoma(ALCL) without nodal involvement is exceedingly rare and the rarity of this tumor often engenders diagnostic dilemma. It has been mostly reported in pediatric, adolescent and young adult patients, mostly of Asian origin. A 70-year-old female patient presented with a mass in the left nasal cavity causing nasal obstruction for 5 months. On clinical and radiological examination, there was a 5.7 cm mass in the left nasal cavity, completely obliterating the left ethmoid sinus. Biopsy from the nasal mass showed a poorly differentiated malignant tumour with large cells arranged in sheets. On immunohistochemistry, the tumour cells were positive for leukocyte common antigen(LCA), CD30, CD43, BCL6 and focally for CD5, TIA1, granzyme B and epithelial membrane antigen(EMA), and were negative for CD56, EBV-LMP1, CD79a, PAX5, myeloperoxidase, CD34, CD7, CD4, CD8, CD138, ALK and p63, suggestive of ALK-negative ALCL. Rest of the lymphoma work-up was essentially normal and she had stage IE disease. She was treated with prephase chemotherapy (Vincristine and Prednisolone) followed by 4 cycles of CEOP[Cyclophosphamide, Etoposide (from 2nd cycle onwards), Vincristine and Prednisolone] regimen and local radiotherapy (36 Gy/20 fractions/4 weeks) by intensity modulated radiotherapy(IMRT) technique resulting in complete clinical and radiological response. At last follow-up visit, 15 months from the initial diagnosis, she was alive and disease free. Sinonasal ALK-negative ALCL is a rare tumor which can be effectively treated with a combination of multi-agent CHOP/CHOP-like regimen and local conformal radiotherapy in geriatric patients.

Clinical and pathological characteristics of peripheral T-cell lymphomas in a Spanish population: a retrospective study

We investigated the clinicopathological features and prognostic factors of patients with peripheral T‐cell lymphoma (PTCL) in 13 sites across Spain. Relevant clinical antecedents, CD30 expression and staining pattern, prognostic indices using the International Prognostic Index and the Intergruppo Italiano Linfomi system, treatments, and clinical outcomes were examined. A sizeable proportion of 175 patients had a history of immune‐related disorders (autoimmune 16%, viral infections 17%, chemo/radiotherapy‐treated carcinomas 19%). The median progression‐free survival (PFS) and overall survival (OS) were 7·9 and 15·8 months, respectively. Prognostic indices influenced PFS and OS, with a higher number of adverse factors resulting in shorter survival (P < 0·001). Complete response (CR) to treatment was associated with better PFS (62·6 vs. 4 months; P < 0·001) and longer OS (67·0 vs. 7·3 months; P < 0·001) compared to no CR. CD30 was expressed across all subtypes; >15% of cells were positive in anaplastic lymphoma kinase‐positive and ‐negative anaplastic large‐cell lymphoma and extranodal natural killer PTCL groups. We observed PTCL distribution across subtypes based on haematopathological re‐evaluation. Poor prognosis, effect of specific prognostic indices, relevance of histopathological sub‐classification, and response level to first‐line treatment on outcomes were confirmed. Immune disorders amongst patients require further examination involving genetic studies and identification of associated immunosuppressive factors.

Alemtuzumab plus CHOP versus CHOP in elderly patients with peripheral T-cell lymphoma: the DSHNHL2006-1B/ACT-2 trial

PTCL patients exhibit poor survival with existing treatments. We investigated the efficacy of CHOP combined with alemtuzumab in 116 PTCL patients age 61-80 in an open-label, randomized phase 3 trial. Alemtuzumab was given on day 1, to a total of 360 mg in 21 patients, or 120 mg in 37. Hematotoxicity was increased with A-CHOP resulting in more grade ≥3 infections (40% versus 21%) and 4 versus 1 death due to infections, respectively. CR/CRu rate was 60% for A-CHOP and 43% for CHOP, and OR rate was 72% and 66%, respectively. Three-year-EFS, PFS and OS were 27% [15%-39%], 28% [15%-40%], and 37% ([23%-50%] for A-CHOP, and 24% [12%-35%], 29% [17%-41%], and 56% [44%-69%] for CHOP, respectively, showing no significant differences. Multivariate analyses, adjusted for strata and sex confirmed these results (hazard ratio HR_EFS: 0.7 ([95% CI: 0.5-1.1]; p = 0.094), HR_PFS: 0.8 ([95% CI: 0.5-1.2]; p = 0.271), HR_OS: 1.4 ([95% CI: 0.9-2.4]; p = 0.154). The IPI score was validated, and male sex (HR_EFS 2.5) and bulky disease (HR_EFS 2.2) were significant risk factors for EFS, PFS, and OS. Alemtuzumab added to CHOP increased response rates, but did not improve survival due to treatment-related toxicity.

EBV status has prognostic implication among young patients with angioimmunoblastic T-cell lymphoma

Epstein‐Barr virus (EBV)‐positive B cells have been detected in 66%‐86% of patients with angioimmunoblastic T‐cell lymphoma (AITL). However, it remains controversial whether EBV status has an impact on the survival of patients with AITL. In this study, we aimed to reevaluate the impact of EBV on the clinicopathological characteristics of AITL. In particular, we focused on the impact of EBV in younger patients with AITL. In total, 270 cases of AITL were studied. Epstein‐Barr virus‐positive B cells were detected in 191 (71%) cases (EBER⁺ group). Among the patients who received anthracycline‐based therapy, the EBER status did not affect the overall survival (OS) or progression‐free survival (PFS). In the younger group of AITL (≤60 years), PFS was significantly worse in the EBER⁻ group compared to the EBER⁺ group (P = .0013). Furthermore, the multivariate analysis identified EBER‐negative status, thrombocytopenia, and elevated serum IgA level as significant adverse prognostic factors for PFS (P < .001, P < .001, and P = .002). Based on these findings, we constructed new prognostic model for the younger group, based on three adverse factors. We classified the patients into two risk groups: low risk (no or 1 adverse factor) and high risk (2 or 3 adverse factors). This new model for younger patients with AITL showed that both OS and PFS were significantly related to the level of risk (P < .0001). In summary, this study showed that, among younger patients with AITL, an EBER⁺ status significantly improved prognosis compared to an EBER⁻ status. Our new prognostic model should be applicable to younger patients with AITL.

Combined Modality Management of Sinonasal Anaplastic Lymphoma Kinase-Positive Anaplastic Large Cell Lymphoma in a Young Adult-Report of a Rare Case

Sinonasal anaplastic lymphoma kinase (ALK)-positive anaplastic large cell lymphoma (ALCL) without nodal involvement is extremely rare and the rarity of this tumor often leads to diagnostic dilemma. It has been predominantly reported in pediatric, adolescent and young adult patients, mostly of Asian origin. A 21-year-old female patient presented with history of epistaxis for 1 year. On clinical and radiological examination, there was a 5 cm mass in the right nasal cavity, ethmoid, and frontal sinus. Biopsy at a local center had shown moderately differentiated squamous cell carcinoma. Rebiopsy at our center showed possibility of a hematolymphoid malignancy(pancytokeratin-, CD45+, CD3-, CD20-) and further immunohistochemistry studies(CD4+, CD43+, CD30+, ALK+) revealed ALK-positive ALCL. Rest of the lymphoma work-up was essentially normal and she had stage IE disease. She was treated with a combination of four cycles of cyclophosphamide, hydroxydaunorubicin, vincristine, and prednisolone (CHOP) regimen followed by local radiotherapy (36 Gray/20 fractions/4 weeks) by three-dimensional conformal technique. She tolerated the treatment well without any severe toxicity and had complete clinical and radiological response. At last follow-up visit, 40 months from the initial diagnosis, she was alive and disease free. Sinonasal ALK-positive ALCL is a rare tumor, which can be effectively treated with a combination of multiagent CHOP/CHOP-like regimen and local conformal radiotherapy.

Treatment and prognosis of mature (non-anaplastic) T- and NK-cell lymphomas in childhood, adolescents, and young adults

Paediatric non-Hodgkin lymphomas (pNHL) are a diverse group of malignancies characterised by nodal and/or extranodal involvement. Less common pNHL forms include those derived from mature T- and natural killer (NK) cells. Much of our current understanding of paediatric mature (non-anaplastic) T/NK-cell lymphomas with respect to pathogenesis, diagnosis and treatment is extrapolated from adult literature. At the Sixth International Symposium on Childhood, Adolescent and Young Adult Non-Hodgkin Lymphoma, convened September 26-29, 2018 in Rotterdam, The Netherlands, some important aspects on diagnosis and outcomes of mature (non-anaplastic) T/NK-cell lymphoma in children and adolescents were discussed and will be reviewed in here.

Cluster Containing More Than 20 CD3-Positive Cells in Bone Marrow Biopsy Is a Candidate Prognostic Indicator in Peripheral T-Cell Lymphoma, Not Otherwise Specified

Assessment of bone marrow (BM) involvement in peripheral T-cell lymphoma, not otherwise specified (PTCL) is straightforward in cases of extensive involvement but difficult in cases of minimal to partial involvement. We evaluated the usefulness of CD3 as an immunohistochemical marker for assessing BM involvement in PTCL patients. BM biopsies of 92 PTCL patients were immunohistochemically stained for CD3, CD4, CD8, CD20, and CD56, and evaluated by two hematopathologists. CD3 positivity was graded according to the proportion of CD3-positive cells and the number of CD3-positive cells in a cluster. These criteria were used to determine the cut-offs at which significant differences in progression-free survival (PFS) and overall survival (OS) were observed. Multivariate analysis controlling the International Prognostic Index (IPI) score and its individual factors revealed that >20 CD3-positive cells in a cluster adversely affected PFS (relative risk [RR], 2.1; 95% confidence interval [CI], 1.0-4.3; P=0.047) and OS (RR, 2.4; 95% CI, 1.1-5.1; P=0.028) independent of IPI score. A cluster with >20 CD3-positive cells is a candidate indicator for BM involvement in PTCL.

Gemcitabine, cisplatin, and dexamethasone (GDP) in combination with methotrexate and pegaspargase is active in newly diagnosed peripheral T cell lymphoma patients: a phase 2, single-center, open-label study in China

Peripheral T cell lymphomas (PTCL) are less responsive to anthracycline-containing regimen such as CHOP and carry a poor prognosis. In this prospective study, we investigated gemcitabine, cisplatin, and dexamethasone (GDP) combined with methotrexate (MTX) and pegaspargase (PEG-L) as front-line treatment in PTCL. Eligible newly diagnosed PTCL patients received 4 cycles of the GDP-ML chemotherapy every 28 days. After 4 cycles, responding patients continued to receive either autologous stem cell transplantation or the MTX/cytarabine (MA) regimen for consolidation. This trial is registered with www.chictr.org.cn (ChiCTR-ONC-12002055). A total of 65 patients were enrolled with a median follow-up of 38.5 months. The overall response rate (ORR) was 55.4%, and complete remission rate (CR) was 33.8%. The median overall survival (OS) was 16 months, and the 1-year and 2-year OS were 59.1% and 38.2%, respectively. The median PFS was only 8 months. The main adverse event was hematologic toxicity: 50% patients showed grade III/IV neutropenia. GDP-ML for the first-line treatment of PTCL patients is an effective induction regimen compared with standard CHOP, and the toxicity was more significant but acceptable. However, future studies exploring new drug combinations are warranted to overcome relapse after remission. ClinicalTrials.gov Identifier: NCT02987244.

Determination of chidamide in rat plasma and cerebrospinal fluid

Chidamide is a new subtype-selective histone deacetylase inhibitor (HDACi), which has been approved for the treatment of recurrent or refractory peripheral T-cell lymphoma (PTCL) in China. However, there are few studies about the application of chidamide in PTCL with central nervous system (CNS) involvement. It is essential to investigate the penetration of chidamide in the blood brain barrier (BBB). LC-MS methods were established firstly to determine the concentration of chidamide in rat plasma and CSF. Then five rats were anaesthetized and the plasma and CSF samples were collected at the time of 5, 15, 30, 60, 120, 180, 240, 360 and 480 min after being administered 1 mg/kg chidamide by intravenous injection, respectively. All samples were analyzed with the established LC-MS method by using the precursor/product transitions (m/z) of 391.1/265.1 for chidamide and 441.1/138.2 for internal standard (IS). The PK parameters were calculated after both of the concentrations of chidamide in plasma and CSF were determined. The penetration ratio of chidamide in BBB ranged from 0.19% to 0.67%. Result indicated chidamide could pass through the BBB, enter into the CNS and have the potential to be utilized in PTCL with CNS involvement.

A 54-year-old male with diabetic nephropathy and suspected disseminated tuberculosis: Clinicopathologic correlation in a rare diagnosis

Tuberculosis (TB) and Non-Hodgkins lymphoma (NHL) share similar clinical and radiological features, which make diagnosis a challenge. It is often difficult to rule out a diagnosis of extrapulmonary and/or disseminated TB because of its paucibacillary nature and difficulty in accessing the involved organs. In countries with high prevalence of TB like ours, empirical antitubercular treatment (ATT) is started, and the patient is followed up closely for response. We present a rare case of a 54-year old diabetic male who was suspected to be a case of disseminated TB but had a rapid downhill course despite ATT. A postmortem revealed features of a rare, aggressive T-cell NHL masquerading as disseminated TB.

Peripheral T cell lymphoma, not otherwise specified (PTCL-NOS). A new prognostic model developed by the International T cell Project Network

Different models to investigate the prognosis of peripheral T cell lymphoma not otherwise specified (PTCL‐NOS) have been developed by means of retrospective analyses. Here we report on a new model designed on data from the prospective T Cell Project. Twelve covariates collected by the T Cell Project were analysed and a new model (T cell score), based on four covariates (serum albumin, performance status, stage and absolute neutrophil count) that maintained their prognostic value in multiple Cox proportional hazards regression analysis was proposed. Among patients registered in the T Cell Project, 311 PTCL‐NOS were retained for study. At a median follow‐up of 46 months, the median overall survival (OS) and progression‐free survival (PFS) was 20 and 10 months, respectively. Three groups were identified at low risk (LR, 48 patients, 15%, score 0), intermediate risk (IR, 189 patients, 61%, score 1–2), and high risk (HiR, 74 patients, 24%, score 3–4), having a 3‐year OS of 76% [95% confidence interval 61–88], 43% [35–51], and 11% [4–21], respectively (P < 0·001). Comparing the performance of the T cell score on OS to that of each of the previously developed models, it emerged that the new score had the best discriminant power. The new T cell score, based on clinical variables, identifies a group with very unfavourable outcomes.

The outcome of peripheral T-cell lymphoma patients failing first-line therapy: a report from the prospective, International T-Cell Project

This analysis explored factors influencing survival of patients with primary refractory and relapsed peripheral T-cell lymphomas enrolled in the prospective International T-cell Project. We analyzed data from 1020 patients with newly diagnosed disease, enrolled between September 2006 and December 2015. Out of 937 patients who received first-line treatment, 436 (47%) were identified as refractory and 197 (21%) as relapsed. Median time from the end of treatment to relapse was 8 months (range 2-73). Overall, 75 patients (8%) were consolidated with bone marrow transplantation, including 12 refractory and 22 relapsed patients. After a median follow up of 38 months (range 1-96 months) from documentation of refractory/relapsed disease, 440 patients had died. The median overall survival (OS) was 5.8 months; 3-year overall survival rates were 21% and 28% for refractory and relapsed patients, respectively (P<0.001). Patients receiving or not salvage bone marrow transplantation had a 3-year survival of 48% and 18%, respectively (P<0.001). In a univariate Cox regression analysis, refractory disease was associated with a higher risk of death (HR=1.43, P=0.001), whereas late relapse (>12 months, HR 0.57, P=0.001) and salvage therapy with transplantation (HR=0.36, P<0.001) were associated with a better OS. No difference was found in OS with respect to histology. This study accurately reflects outcomes for patients treated according to standards of care worldwide. Results confirm that peripheral T-cell lymphomas patients had dismal outcome after relapse or progression. Patients with chemotherapy sensitive disease who relapsed after more than 12 months might benefit from consolidation bone marrow transplantation.

Epstein-Barr Positive T-Cell Lymphoma in the Ocular Region

Purpose

To present two cases of rapidly growing tumors in the ocular adnexa. Both tumors were Epstein-Barr virus (EBV) positive peripheral T-cell lymphoma.

Methods

Case 1 was a 60-year-old man with a non-tender ulcerating tumor involving the lateral third of both upper and lower right eyelid. Case 2 was a 55-year-old man with a swelling of the left eyelid expanding cranially and dislocating the left eye, resulting in proptosis and diplopia. Both patients underwent incisional biopsy that did not disclose the malignant nature of the tumors. Clinical evaluation resulted in suspicion of malignancy and surgical excision was performed.

Results

The tumors were found to be consistent with EBV-positive peripheral T-cell lymphoma.

Conclusions

Peripheral T-cell lymphoma is uncommon but a diagnosis to be considered in a patient with a tumorous lesion in the eye region. Furthermore, peripheral T-cell lymphoma may be EBV-positive.

Clinicopathological characteristics of T-cell non-Hodgkin lymphoma arising in patients with immunodeficiencies: a single-center case series of 25 patients and a review of the literature

Although it is known that B-cell lymphomas occur more frequently in immunocompromised patients, thus far such an association has not been clearly established for T-cell lymphomas. Of the 251 patients who were diagnosed with a T-cell non-Hodgkin lymphoma in our center between 1999 and 2014, at least 25 were identified in immunocompromised patients. Herein, we retrospectively analyzed the clinical and pathological characteristics of these 25 cases. In addition, we searched the literature and present an overview of 605 previously published cases. The actual number of patients with B-cell chronic lymphocytic leukemia and patients on immunosuppressive drugs for inflammatory bowel disease or rheumatoid arthritis in the total cohort of 251 patients diagnosed with T-cell non-Hodgkin lymphoma was much higher than the number of patients expected to have these diseases in this cohort, based on their prevalence in the general population. This, together with the large number of additional cases found in the literature, suggest that the risk of developing T-cell non-Hodgkin lymphoma is increased in immunocompromised patients. Compared to T-cell non-Hodgkin lymphoma in the general population, these lymphomas are more often located extranodally, present at a younger age and appear to have a poor outcome. The observations made in the study herein should raise awareness of the possible development of T-cell non-Hodgkin lymphoma in immunodeficient patients, and challenge the prolonged use of immunosuppressive drugs in patients who are in clinical remission of their autoimmune disease.

Treatment outcomes of IMEP as a front-line chemotherapy for patients with peripheral T-cell lymphomas

Background

This study aimed to assess the treatment outcomes of ifosphamide, mesna, etoposide, and prednisolone (IMEP) combination regimen as a front-line chemotherapy in patients with peripheral T-cell lymphomas (PTCLs).

Methods

Clinical data of 38 newly diagnosed PTCLs patients who underwent IMEP at Busan Paik Hospital from January 2002 to December 2013 were retrospectively analyzed.

Results

The overall response rate was 68.5%, with 21 (55.3%) complete response/complete response unconfirmed and 6 (15.8%) partial response (PR). The median follow-up duration was 25.5 months (range, 0.2-87.3). The median overall survival was not reached and 2-year survival rate was 67%. The median progression free survival was 23 months. The most frequently reported adverse effects higher than grade 3 were hematologic toxicities including neutropenia (68.4%), thrombocytopenia (42.1%). There was no treatment-related mortality.

Conclusion

IMEP regimen is effective and safe as a front-line chemotherapy in patients with PTCLs.

The Value and Relevance of the T Cell Lymphoma Registries and International Collaborations: the Case of COMPLETE and the T-Cell Project

Peripheral T cell lymphomas (PTCLs) are a heterogeneous group of lymphoid malignancies that portend a poor prognosis and have an undefined optimal therapeutic strategy. Data on best practices stem from prior studies that have generally included B cell lymphomas. However, the enhanced ability to diagnose PTCLs, the development of newer agents specific for PTCLs, and its increased incidence have called the scientific community to develop better strategies to combat these neoplasms. To that end, T cell lymphoma registries were developed in an attempt to answer relevant questions on the prognosis and management of PTCLs. The largest registries currently enrolling patients are the Comprehesive Oncology Measures for PeripheraL T-cEll Lymphoma TrEatment (COMPLETE) and the T-Cell Project. Despite the inherent limitations of these studies, valuable information are being collected to refine our management approaches and to aid in designing future clinical trials. This review illustrates the value of these registries and describes the critical questions that need to be answered.

Peripheral T Cell Lymphoma Presenting as Dermatomyositis-like Eruption

Background:

There are several conditions reported to mimic the cutaneous manifestations of dermatomyositis, including lymphoproliferative disorders.

Objective:

This case report presents an unusual case of peripheral T cell lymphoma mimicking dermatomyositis and discusses the clinical and pathologic features that distinguish it from dermatomyositis.

Methods and Results:

A 62-year-old woman presented with a two-month history of a progressive painful cutaneous eruption and interstitial infiltrates on chest x-ray. Skin biopsy revealed peripheral T cell lymphoma. The diagnosis was confirmed by lung biopsy.

Conclusions:

Although rare, a lymphoproliferative disorder must be included in the differential diagnosis of a cutaneous dermatomyositis-like eruption.

Clinical features and treatment outcomes of peripheral T-cell lymphoma in children. A current data report from Polish Pediatric Leukemia/Lymphoma Study Group (PPLLSG)

PURPOSE

Peripheral T-cell lymphomas (PTCL) are lymphoproliferative disorders derived from post-thymic cells, that occur extremely rarely in children. The optimal treatment of pediatric PTCL remains still unclear.

PATIENTS AND METHODS

Ten children with PTCL from 3 up to 18 years of age registered by the Polish Pediatric Leukemia/Lymphoma Study Group (PPLLSG) were retrospectively analyzed. All patients were treated with different regimens including protocols: for lymphoblastic lymphoma in 7 cases, for anaplastic large cell lymphoma in 1, CHOP in 1. Five of the 10 patients with PTCL were classified as stage II; 4 as stage III and 1 as stage IV due to extralymphatic organs (bone marrow) involvement. Four histological subtypes of PTCL were recognized: extranodal NK/T-cell lymphoma, nasal type (ENTNT), peripheral T-cell lymphoma not otherwise specified (PTCL-NOS), subcutaneous panniculitis-like T-cell lymphoma (SPL), Sezary syndrome (SS). After first-line therapy 9 patients initially achieved complete remission, 4 relapsed, 5 died. One patient achieved remission spontaneously. Three children (1 with stage IV and 2 in relapse) underwent high-dose chemotherapy with allogeneic bone marrow stem cell transplantation and all of them are alive and in CR.

RESULTS

The cumulative probability of 5-year overall survival (OS) for our whole group was 63.9% (95%CI: 35.2-88.2%) with a median follow-up time of 48.4 months (range 24-90+ months). The 5-year event free survival (EFS) was 81%. PTCLs are a heterogeneous and rare group of childhood NHLs.

CONCLUSIONS

According to our experience the standard chemotherapy for precursor lymphomas seems to be a beneficial treatment option for children with PTCL. Allogeneic stem cell transplantation may improve the outcome in selected patients.

Central nervous system involvement in T-cell lymphoma: A single center experience

Background We characterized the incidence of central nervous system (CNS) involvement, risk factors and outcome in a large single institution dataset of peripheral T-cell lymphoma (PTCL). Methods Retrospective review of the PTCL database at Memorial Sloan Kettering Cancer Center. We identified 231 patients with any subtype of PTCL between 1994-2011 with a minimum six months of follow-up or an event defined as relapse or death. Results Histologies included peripheral T-cell lymphoma-not otherwise specified (PTCL-NOS) (31.6%), angioimmunoblastic (16.9%), anaplastic large cell lymphoma (ALCL), ALK- (12.1%), ALCL, ALK + (6.1%), extranodal NK/T-cell lymphoma (7.4%), adult T-cell leukemia/lymphoma (ATLL) (7.4%), and transformed mycosis fungoides (8.7%). Seventeen patients had CNS disease (7%). Fifteen had CNS involvement with PTCL and two had diffuse large B-cell lymphoma and glioblastoma. Median time to CNS involvement was 3.44 months (0.16-103.1). CNS prophylaxis was given to 24 patients (primarily intrathecal methotrexate). Rates of CNS involvement were not different in patients who received prophylaxis. Univariate analysis identified stage III-IV, bone marrow involvement, >1 extranodal site and ATLL as risk factors for CNS disease. On multivariate analysis, >1 extranodal site and international prognostic index (IPI) ≥ 3 were predictive for CNS involvement. The median survival of patients with CNS involvement was 2.63 months (0.10-75). Conclusions Despite high relapse rates, PTCL, except ATLL, carries a low risk of CNS involvement. Prognosis with CNS involvement is poor and risk factors include: >1 extra nodal site and IPI ≥3.

A phase II study on the role of gemcitabine plus romidepsin (GEMRO regimen) in the treatment of relapsed/refractory peripheral T-cell lymphoma patients

Background

There is no consensus regarding optimal treatment for peripheral T-cell lymphomas (PTCL), especially in relapsed or refractory cases, which have very poor prognosis and a dismal outcome, with 5-year overall survival of 30 %.

Methods

A multicenter prospective phase II trial was conducted to investigate the role of the combination of gemcitabine plus romidepsin (GEMRO regimen) in relapsed/refractory PTCL, looking for a potential synergistic effect of the two drugs. GEMRO regimen contemplates an induction with romidepsin plus gemcitabine for six 28-day cycles followed by maintenance with romidepsin for patients in at least partial remission. The primary endpoint was the overall response rate (ORR); secondary endpoints were survival, duration of response, and safety of the regimen.

Results

The ORR was 30 % (6/20) with 15 % (3) complete response (CR) rate. Two-year overall survival was 50 % and progression-free survival 11.2 %. Grade ≥3 adverse events were represented by thrombocytopenia (60 %), neutropenia (50 %), and anemia (20 %). Two patients are still in CR with median response duration of 18 months. The majority of non-hematological toxicities were mild and transient. No treatment-related death occurred and no toxicity led to treatment interruption.

Conclusions

GEMRO combination regimen shows efficacy data similar to those of single-agent romidepsin with additional hematologic toxicities. Synergy observed in preclinical phase did not turn into ability to improve clinical outcomes.

Trial registration

The trial was registered under EudraCT 2012-001404-38; ClinicalTrials.gov number, NCT01822886.

Investigational drugs for T-cell lymphoma

INTRODUCTION

Peripheral T-cell lymphomas (PTCL) represent a heterogeneous group of malignancies frequently associated with a poor outcome. The frontline treatment strategy for PTCL relies mostly on CHOP or CHOP-like regimens, which are associated with a high failure rate and frequent relapses.

AREAS COVERED

In this review, the authors present recently registered drugs and their positioning in the therapeutic armamentarium against PTCL and new drugs currently in development. The successful results in CD30-positive anaplastic large cell lymphomas suggest that a better characterization of these lymphomas could open new areas of efficient drug development.

EXPERT OPINION

Advances in the field of molecular biology have started to unravel the anomalies associated with T-cell malignancies. Recent knowledge on potential epigenetic modifiers like IDH2, which is frequently mutated in angioimmunoblastic T-cell lymphoma, opens new areas of research and confirms that epigenetic drugs could represent an attractive area of clinical research. The recently developed immune checkpoints regulators might represent another area of potential interest.

Salvage chemotherapy of gemcitabine, dexamethasone, and cisplatin (GDP) for patients with relapsed or refractory peripheral T-cell lymphomas: a consortium for improving survival of lymphoma (CISL) trial

There is no standard salvage chemotherapy for relapsed or refractory peripheral T-cell lymphomas (PTCLs). Gemcitabine combined with cisplatin has been known as an effective regimen for lymphoma treatment in the salvage setting. We investigated the efficacy and toxicity of gemcitabine, dexamethasone, and cisplatin (GDP) for relapsed or refractory PTCLs in search of a more effective and less toxic therapy. Patients with relapsed or refractory PTCLs with more than one previous regimen were eligible. Treatment consisted of gemcitabine 1000 mg/m(2) intravenously (i.v.) on days 1 and 8, dexamethasone 40 mg orally on days 1-4, and cisplatin 70 mg/m(2) i.v. on day 1, and then every 21 days. Patients could proceed to autologous stem cell transplantation (ASCT) after four cycles of GDP or receive up to six treatment cycles. Twenty-five eligible patients were evaluated for toxicity and response. The diagnoses of participants included 14 cases of PTCL-not otherwise specified (NOS) (56 %) and four cases of angioimmunoblastic T-cell lymphoma (16 %) among others. The median age of the patients was 59 years (range 20-75 years). After treatments with GDP, which delivered a median of four GDP cycles, there were 12 patients with complete responses (CR; 48 %) and six with partial responses (PR; 24 %). The overall response rate (RR) was 72 %. Four patients preceded to ASCT, and three patients finally achieved CR. The median progression free survival was 9.3 months (95 % confidence interval (CI); 4.1-14.6) with a median follow-up duration of 27.1 months. In a total of 86 cycles of GDP, grade 3 or 4 neutropenia and thrombocytopenia occurred in 16.3 and 12.8 % of cycles, respectively. Three patients (3.3 %) experienced febrile neutropenia. GDP is a highly effective and optimal salvage regimen for relapsed or refractory PTCLs and can be administered with acceptable toxicity.

The neutrophil-to-lymphocyte ratio is an independent prognostic factor in patients with peripheral T-cell lymphoma, unspecified

Peripheral T-cell lymphoma (PTCL) encompasses a group of rare and aggressive lymphomas. PTCL, unspecified (PTCLU) is the most common subtype of PTCL, and carries a poor prognosis. The International Prognostic Index (IPI) and the Prognostic Index for PTCLU (PIT) scoring systems are powerful risk-stratification tools in patients with PTCL. The aim of this study was to evaluate whether the neutrophil-to-lymphocyte ratio (NLR) is a prognostic factor in PTCLU. We retrospectively studied 83 patients with diagnosis of PTCLU. In the univariate analysis, NLR ≥ 4 was associated with worse overall survival (HR 3.96, 95% CI 1.92-8.17; p < 0.001). In the multivariate analysis, NLR ≥ 4 was independently associated with worse overall survival after adjustment for the PIT score (HR 4.30, 95% CI 1.90-9.69; p < 0.001), and for the IPI score (HR 2.60, 95% CI 1. 12-6.04; p = 0.03). Our study suggests the NLR could be helpful in refining the survival prognostication in patients with PTCLU.

Primary nodal peripheral T-cell lymphomas: diagnosis and therapeutic considerations

Nodal peripheral T-cell lymphomas are a rare group of neoplasms derived from post-thymic and activated T lymphocytes. A review of scientific articles listed in PubMed, Lilacs, and the Cochrane Library databases was performed using the term “peripheral T-cell lymphomas”. According to the World Health Organization classification of hematopoietic tissue tumors, this group of neoplasms consists of peripheral T-cell lymphoma not otherwise specified (PTCL-NOS), angioimmunoblastic T-cell lymphoma (AITL), anaplastic large cell lymphoma-anaplastic lymphoma kinase positive (ALCL-ALK⁺), and a provisional entity called anaplastic large cell lymphoma-anaplastic lymphoma kinase negative (ALCL-ALK⁻). Because the treatment and prognoses of these neoplasms involve different principles, it is essential to distinguish each one by its clinical, immunophenotypic, genetic, and molecular features. Except for anaplastic large cell lymphoma-anaplastic lymphoma kinase positive, which has no adverse international prognostic index, the prognosis of nodal peripheral T-cell lymphomas is worse than that of aggressive B-cell lymphomas. Chemotherapy based on anthracyclines provides poor outcomes because these neoplasms frequently have multidrug-resistant phenotypes. Based on this, the current tendency is to use intensified cyclophosphamide, doxorubicin, vincristine, prednisolone (CHOP) regimens with the addition of new drugs, and autologous hematopoietic stem cell transplantation. This paper describes the clinical features and diagnostic methods, and proposes a therapeutic algorithm for nodal peripheral T-cell lymphoma patients.

New developments in the treatment of peripheral T-cell lymphoma - role of Belinostat

Peripheral T-cell lymphomas (PTCL) represent a heterogeneous group of rare malignancies that with the exception of anaplastic lymphoma kinase expressing anaplastic large cell lymphoma, share a poor outcome after standard (eg, anthracycline-based) chemotherapy. Most patients are either refractory to initial therapy or eventually relapse. Randomized studies for relapsed/refractory PTCL are not available, however, recently published data show that conventional chemotherapy has very limited efficacy in the salvage setting. Thus, novel drugs are urgently needed to improve the outcome in this setting. Belinostat, a pan-histone deacetylase inhibitor, has demonstrated meaningful efficacy and a favorable toxicity profile in two single-arm Phase II trials on 153 patients with relapsed/refractory PTCL. The conclusive results led to an accelerated approval by the US Food and Drug Administration. The present review summarizes the clinical data available for belinostat, its current role, and future perspectives.

T-cell lymphoma masquerading as extrapulmonary tuberculosis: case report and review of literature

It is often difficult to establish confirmatory diagnosis in cases of extrapulmonary tuberculosis (TB) because of its paucibacillary nature and difficulty in accessing the involved organs. In several cases, empirical anti-tubercular treatment is started, and the patient is followed-up closely for response. In countries with high prevalence of TB, it is a reasonably good strategy and works most of the times. However, catastrophe may occur when aggressive lymphomas masquerade as TB.

Cerebellar EBV-associated diffuse large B cell lymphoma following angioimmunoblastic T cell lymphoma

Epstein-Barr virus (EBV)-associated B cell lymphoproliferative disorders may be seen in patients with angioimmunoblastic T cell lymphoma (AITL). Although both nodal and extranodal sites of involvement have been described, central nervous system involvement by B cell lymphoma following AITL has not previously been documented. We report a first example of such unusual presentation, in which an 80-year-old man developed diffuse large B cell lymphoma (DLBCL) in the cerebellum 4 months after the initial diagnosis of AITL. EBV-encoded RNAs were detected in the DLBCL, suggesting that EBV played a pivotal role in the pathogenesis of high-grade histologic progression of AITL. The patient survived less than 9 months after his initial diagnosis of AITL. We believe that this case expands the spectrum of extranodal manifestation of EBV-positive B cell lymphoma associated with AITL and illustrates the importance of recognition of this association when encountering unusual central nervous system lesions in patients with known AITL.

Sonographic appearance of uterine lymphoma: case report and review of the literature

Uterine lymphoma is rare and tends to be misdiagnosed due to lack of specific radiologic features. Few reports have been published on the sonographic characteristics of uterine lymphoma. We present a case report of uterine lymphoma manifested by a fast growing uterus and describe the sonographic findings.

Treatment options for patients with relapsing and refractory peripheral T-cell lymphoma

SUMMARY 

Peripheral T-cell lymphomas are rare malignancies that with the exception of ALK-expressing anaplastic large cell lymphoma show a poor outcome after conventional (anthracycline-based) chemotherapy. The median overall survival ranges between approximately 9–42 months. Most patients are refractory or relapsing, and need salvage treatment. Several strategies have been investigated for this setting, but data are sparse. Autologous and allogeneic stem cell transplantation can induce long-term remissions and cure in a subset of chemosensitive patients. In addition, novel agents are available and under investigation to improve the outcome in this challenging group of diseases.

The role of front-line anthracycline-containing chemotherapy regimens in peripheral T-cell lymphomas

Peripheral T-cell lymphomas (PTCLs) are a heterogenous group of aggressive non-Hodgkin's lymphomas that are incurable in the majority of patients with current therapies. Outcomes associated with anthracycline-based therapies are suboptimal, but remain the standard of care for most patients, even though the benefits of this approach remain uncertain. This study retrospectively examined outcomes in a cohort of North American PTCL patients treated with both anthracycline- and nonanthracycline-containing regimens. The incorporation of anthracycline-containing regimens was associated with improved progression-free survival (PFS) and overall survival (OS). Patients treated with nonanthracycline-containing regimens were more likely to have high-risk features and were less likely to undergo high-dose therapy and stem cell transplantation. However, anthracycline use remained an independent predictor of improved PFS and OS when adjusting for these confounding variables. Anthracycline-based regimens and consolidation with high-dose therapy and autologous stem cell transplantation in appropriately selected patients remains a viable option for patients unable to participate in a clinical trial. Long-term disease-free survival is not optimal, highlighting the need for an improved understanding of disease pathogenesis, and the development of novel therapeutic strategies.

Romidepsin for the treatment of T-cell lymphomas

PURPOSE

The pharmacology, pharmacokinetic and pharmacodynamic properties, and clinical data on a novel therapy for the treatment of cutaneous or peripheral T-cell lymphoma (CTCL, PTCL) are summarized.

SUMMARY

Romidepsin is the only bicyclic histone deacetylase (HDAC) inhibitor to undergo clinical development. A potent and specific inhibitor of class 1 HDACs, romidepsin has linear pharmacokinetics and is primarily metabolized by cytochrome P-450 isoenzyme 3A4. In two Phase II studies involving patients with relapsed or refractory CTCL, romidepsin therapy produced overall response rates of 34-35% (including patients with advanced and heavily pretreated disease), with a complete response seen in about 6% of patients in both studies; romidepsin responses were seen across all evaluated disease sites (skin, blood, lymph, viscera). In two Phase II studies in patients with relapsed or refractory PTCL, romidepsin produced overall response rates of 25-38%, and 15-18% of patients experienced a complete response; therapeutic responses were seen across major PTCL subtypes regardless of the number or types of previous therapies or refractoriness to the last prior therapy. In clinical trials to date, romidepsin therapy was generally well tolerated, with nausea, fatigue, and vomiting reported as the most common nonhematologic adverse events. However, thrombocytopenia and neutropenia are relatively common events, especially in patients with PTCL.

CONCLUSION

Romidepsin, a class 1-specific HDAC inhibitor, induces durable responses, with a manageable toxicity profile, in patients with relapsed or refractory CTCL or PTCL who have few therapeutic options.

FDG PET/CT findings in 3 cases of pulmonary peripheral T-cell lymphoma

Pulmonary involvement of peripheral T-cell lymphoma is rare. It is difficult to make a clinical and radiologic diagnosis of pulmonary lymphomatous involvement, yet the diagnosis is often critical in determining treatment. We present 3 cases of pulmonary peripheral T-cell lymphoma with FDG PET/CT findings. In these 3 cases, FDG PET/CT images revealed multiple bilateral FDG-avid nodules, masses, or mass-like consolidations with or without air bronchogram. Familiarity with these imaging features may be helpful for the diagnosis and differential diagnosis.

High-dose therapy and autologous hematopoietic stem cell transplant in T-cell lymphoma: a single center experience

We report here the long-term outcome of autologous stem cell transplant in peripheral T-cell lymphoma (PTCL). Forty-three consecutive patients with PTCL diagnosed between 2000 and 2011 were treated with high-dose chemotherapy (HDCT) and autologous stem cell transplant (ASCT) in our center. Diagnoses included PTCL-not otherwise specified (n = 19), anaplastic large cell lymphoma (n = 11), angioimmunoblastic T-cell lymphoma (n = 5), enteropathy-associated T-cell lymphoma (n = 5) and other rare subtypes (n = 3). Thirty-six patients with a median age of 50 years (range 22-65) were transplanted in first response and seven after relapse. After a median follow-up of 63 months, estimated overall survival at 12 years was 40%, progression-free survival at 12 years was 34% and event-free survival at 12 years was 30%. On univariate analysis, age less than 50 years and no B symptoms at diagnosis were significantly associated with prolonged overall and progression-free-survival. HDCT/ASCT for peripheral T-cell lymphoma can lead to long-term survival for patients responding to induction chemotherapy.

Long-term complete remission with belinostat in a patient with chemotherapy refractory peripheral T-cell lymphoma

Peripheral T/NK-cell lymphomas (PTCL) are rare malignancies with a poor prognosis. Due to the lack of randomised studies, standard therapy has not been established. First-line treatment with anthracycline-based polychemotherapy followed by consolidation with high-dose therapy and autologous stem cell transplant in responding patients has demonstrated good feasibility with low toxicity in prospective studies and is widely used in eligible patients. In relapsed and refractory patients, who are not candidates for transplant approaches, therapeutic options are limited and are usually palliative. Several new agents are currently under investigation to improve the outcome of PTCL in the first line and salvage settings. Belinostat, a histone deacetylase (HDAC) inhibitor, has demonstrated broad antineoplastic activity in preclinical studies, and promising results in advanced relapsed/refractory lymphomas.Here, we report the case of a 73 year old patient with heavily pre-treated refractory PTCL in complete remission with belinostat for 39 months.