Primary central nervous system lymphoma (PCNSL) is a rare and aggressive non-Hodgkin’s lymphoma that affects the brain, eyes, cerebrospinal fluid, or spinal cord without systemic involvement. The outcome of patients with PCNSL is worse compared to patients with systemic diffuse large B-cell lymphoma. Given potential mortality associated with severe immune effector cell-associated neurotoxicity syndrome (ICANS), patients with PCNSL have been excluded from most clinical trials involving chimeric antigen receptor T-cell (CAR-T) therapy initially. Here, we report for the first time to apply decitabine-primed tandem CD19/CD22 dual-targeted CAR-T therapy with programmed cell death-1 (PD-1) and Bruton’s tyrosine kinase (BTK) inhibitors maintenance in one patient with multiline-resistant refractory PCNSL and the patient has maintained complete remission (CR) for a 35-month follow-up period. This case represents the first successful treatment of multiline resistant refractory PCNSL with long-term CR and without inducing ICANS under tandem CD19/CD22 bispecific CAR-T therapy followed by maintenance therapy with PD-1 and BTK inhibitors. This study shows tremendous potential in the treatment of PCNSL and offers a look toward ongoing clinical studies.
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Purpose
This study aimed to investigate the methylation status of major histone modification sites in primary central nervous system lymphoma (PCNSL) samples and examine their prognostic roles in patients with PCNSL.
Materials and Method
Between 2007 and 2020, 87 patients were histopathologically diagnosed with PCNSL. We performed immunohistochemical staining of the formalin-fixed paraffin-embedded samples of PCNSL for major histone modification sites, such as H3K4, H3K9, H3K27, H3K14, and H3K36. After detection of meaningful methylation sites, we examined histone modification enzymes that induce methylation or demethylation at each site using immunohistochemical staining. The meaningful immunoreactivity was validated by western blotting using fresh tissue of PCNSL.
Results
More frequent recurrences were found in hypomethylation of H3K4me3 (p=0.004) and hypermethylation of H3K27me2 (p<0.001) and H3K27me3 (p=0.002). These factors were also statistically related to short PFS and overall survival in the univariate and multivariate analyses. Next, histone modification enzymes inducing the demethylation of H3K4 (lysine-specific demethylase-1/2 and Jumonji AT-rich interactive domain [JARID] 1A-D]) and methylation of H3K27 (enhancer of zeste homolog [EZH]-1/2) were immu- nohistochemically stained. Among them, the immunoreactivity of JARID1A inversely associated with the methylation status of H3K4me3 (R2=-1.431), and immunoreactivity of EZH2 was directly associated with the methylation status of H3K27me2 (R2=0.667) and H3K27me3 (R2=0.604). These results were validated by western blotting in fresh PCNSL samples.
Conclusion
Our study suggests that hypomethylation of H3K4me3 and hypermethylation of H3K27me2 and H3K27me3 could be associated with poor outcomes in patients with PCNSL and that these relationships are modified by JARID1A and EZH2.
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Purpose
Malignant central nervous system (CNS) germ cell tumors (GCTs), although rare, are thought to occur more frequently among Asians. However, a recent population-based study revealed no differences in GCT incidence between Asians and Caucasians. Therefore, this study was conducted to determine the incidence and survival rates of CNS GCTs using the national cancer incidence database, and to compare these rates to those in the United States and Japan.
Materials and Methods
We extracted CNS GCT patients diagnosed between 2005 and 2012 from the Korea Central Cancer Registry database. Age-standardized rates (ASRs), annual percentage change, and the male-female incidence rate ratios (IRRs) were calculated. To estimate the survival rate, we used data for patients diagnosed between 2005 and 2010 and followed their cases until December 31, 2013.
Results
The ASR for CNS GCT between 2005 and 2012 was 0.179 per 100,000 (95% confidence interval, 0.166 to 0.193), with an overall male-to-female (M:F) IRR of 2.95:1. However, when stratified by site, the M:F IRR was 13.62:1 for tumors of the pineal region and 1.87:1 for those located in nonpineal regions. The most frequent histologic type was germinoma (76.0%), and the most frequent location was the suprasellar region (48.5%). The 5-year survival rate of germinoma patients was 95.3%.
Conclusion
The incidence rate of CNS GCTs in Korea during 2005-2012 was 0.179 per 100,000, which was similar to that of the Asian/Pacific Islander subpopulation in the United States. Moreover, the CNS GCT survival rate in Korea was similar to rates in Japan and the United States.
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Purpose Primary central nervous system lymphoma (PCNSL) is an uncommon brain tumor accounting for 2%-5% of all primary brain tumors. Few population-based analyses of survival for patients with PCNSL have been conducted, particularly in Asian countries. Materials and Methods Using the Korea National Cancer Incidence Database, 1,062 cases of PCNSL newly diagnosed from 1999 to 2009 were analyzed. The crude rate, age-standardized rate (ASR), and annual percent change were calculated. To estimate the observed survival, we restricted the data to between 1999 and 2007 and followed the cases until December 2010. The overall survival was estimated using the Kaplan-Meier method, and piecewise Poisson regression model.
Results The ASR for PCNSL between 1999 and 2009 was 0.17 per 100,000, and the annual percent change from 1999 to 2009 was 8.8% (p < 0.001). The ASR of males was higher than that of females, and the older groups (60s or over) showed the largest increase in incidence rates. For all ages, the five-year survival from PCNSL was 29.9% between 1999 and 2007. Survival from PCNSL is known to show strong association with age at diagnosis. Conclusion These results are similar to those of previous studies. Our findings may be helpful to clinicians and patients in determining long-term prognoses for PCNSL.
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Jeong Eun Lee, Dae Yong Kim, Yong Chan Ahn, Do Hoon Lim, Seung Jae Huh, Seong Soo Shin, Won Seok Kim, Won Ki Kang, Do Hyun Nam, Jung Il Lee, Jong Hyun Kim
Cancer Res Treat. 2001;33(5):398-403. Published online October 31, 2001
PURPOSE This study was performed in order to evaluate the effectiveness of combined chemotherapy and radiotherapy (RT) in primary central nervous system lymphoma (PCNSL). MATERIALS AND METHODS From January 1995 to August 1999, 21 patients with a diagnosis of PCNSL were treated with combined chemotherapy and radiotherapy. Their median age was 47 years with range of 19 to 78 years. Twelve patients were male and nine patients were female. All patients were immunocompetent and they had no evidence of systemic lymphoma. All patients underwent placement of an Ommaya reservoir and recieved a combination regimen using pre-RT systemic and intra-Ommaya methotrexate (MTX), 40 Gy whole-brain RT with a 14.4 Gy boost, and 2 courses of post-RT high-dose cytarabine. The median follow-up period of all patients and survived patients were 22 months and 36 months, respectively. RESULTS The median overall survival duration was 21 months and the overall two- and four-year survival rates were 51% and 43%, respectively. Complete response (CR), partial response, stable disease, and progressive disease were achieved in 12, 3, 1, and 5 patients, respectively. All nine patients without CR expired within 1-31 months (median 6 months). Two patients among the patients with CR developed recurrence after 13 and 14 months, respectively. The location of recurrent disease was within the port of radiation boost. Survival was influenced by age, performance status, and CR. There was one episode of MTX neurotoxicity and hepatotoxicity,respectively. CONCLUSION Combined chemotherapy and radiotherapy was an effective treatment for PCNSL, and was associated with a minimum toxicity. However, we must pay attention to the recurrence and late toxicity, particularly within two years following treatment.
Primary testicular non-Hodgkin's Lymphoma is very rare. It may be the systemic manifestation of nodular lymphoma. The most common symptom of primary testicular lymphoma is the painless enlargement of testis. It frequently involves Waldeyer's ring, skin and central nervous system. The combination chemotherapy and CNS prophlylaxis may be needed in the treatment of early stage primary testicular non-Hodgkin's lymphoma. We are reporting a case of primary testicular non-Hodgkin's 1ymphoma stage I, which relapsed in central nervous system during combination chemotherapy.