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Liang X, Yang C, Su M, Zou L. Diagnosis of bone marrow involvement in angioimmunoblastic T-cell lymphoma should be based on both [ 18F]FDG-PET/CT and bone marrow biopsy findings. Curr Med Res Opin 2024; 40:803-811. [PMID: 38626218 DOI: 10.1080/03007995.2024.2337670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Accepted: 03/28/2024] [Indexed: 04/18/2024]
Abstract
OBJECTIVE During the initial staging of certain lymphoma subtypes, 18 F-fluorodeoxyglucose positron emission tomography/computed tomography ([18F]FDG-PET/CT) has become an alternative to bone marrow biopsy (BMB) for detecting bone marrow (BM) involvement. However, whether [18F]FDG-PET/CT can accurately detect BM involvement in angioimmunoblastic T-cell lymphoma (AITL) remains unknown. Our study aimed to assess the diagnostic and prognostic capability of [18F]FDG-PET/CT for detecting BM involvement in AITL. Methods: This retrospective study included 84 individuals newly diagnosed with AITL who underwent baseline BMB and [18F]FDG-PET/CT. "BM involvement" was defined as one or both of the following: 1) angioimmunoblastic T-cells detected in the BM; or 2) initially heightened focal uptake having disappeared on follow-up [18F]FDG-PET/CT. The ability of [18F]FDG-PET/CT to detect BM cancerous lesions was respectively analyzed by BM involvement confirmed by BMB or the aforementioned definition as the reference standard. The patients' clinical characteristics and survival and prognostic outcomes were respectively analyzed. RESULTS Of the 84 participants, five (6.0%) displayed positive BMB and PET/BM results, 17 (20.2%) had BMB-positive but PET/BM-negative results, eight (9.5%) showed BMB-negative but PET/BM-positive outcomes, and 54 (64.3%) displayed negative BMB and PET/BM outcomes. Using pre-defined BM involvement as the reference standard, [18F]FDG-PET/CT exhibited a specificity of 100%, sensitivity of 40%, negative predictive value (NPV) of 75%, and positive predictive value (PPV) of 100%. In contrast, using BMB-detected BM involvement as reference, [18F]FDG-PET/CT exhibited a sensitivity, specificity, PPV, and NPV of 38.5%, 76.1%, 22.7%, and 87.1%, respectively. Among patients with PET/BM-positive and BMB-negative outcomes, 62.5% (5/8) underwent upstaging from III to IV. In 58.8% (10/17) of patients who were initially diagnosed with stage II/III disease based on the [18F]FDG-PET/CT results, repeat BMB resulted in upstaging to IV. PET/BM-negative patients had a higher 3-year progression-free survival rate (38.3% vs. 22.8%, p = 0.018) and 3-year overall survival rate (64.4% vs. 34.6%, p = 0.011) than PET/BM-positive patients. CONCLUSION In AITL patients, PET/BM-positive results may obviate the necessity for repeat BMB to ascertain confirm BM involvement. PET/BM-negative results do not definitively exclude BM involvement. The combined use of [18F]FDG-PET/CT and BMB can increase the diagnostic accuracy of BM involvement for AITL patients.
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Affiliation(s)
- Xinyu Liang
- Department of Medical Oncology, Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Chunli Yang
- Department of Medical Oncology, Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Minggang Su
- Department of Medical Oncology, Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Liqun Zou
- Department of Medical Oncology, Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
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Lee TH, Kim HJ, Lee JH, Lee J, Kim JH, Oh D, Eom KY. Assessment of Bone Marrow Involvement in Extranodal NK/T-Cell Lymphoma: Positron Emission Tomography versus Bone Marrow Biopsy, and the Significance of Minimal Involvement by EBV+ Cells (KROG 18-09). Cancer Res Treat 2024; 56:688-696. [PMID: 38097921 PMCID: PMC11016645 DOI: 10.4143/crt.2023.1049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Accepted: 12/10/2023] [Indexed: 04/13/2024] Open
Abstract
PURPOSE This study aims to investigate the diagnostic significance of positron emission tomography/computed tomography (PET/CT) in assessing bone marrow (BM) involvement through a comparison of PET/CT findings with BM biopsy in extranodal natural killer/T-cell lymphoma. MATERIALS AND METHODS The medical records of 193 patients were retrospectively reviewed. Patients were categorized as having early-stage (PET-ES) or advanced-stage (PET-AS) disease based on PET/CT results. The BM involvement was classified into three groups according to BM biopsy: gross BM involvement, minimal BM involvement (defined as the presence of a limited number of Epstein-Barr virus-positive cells in BM), and no involvement. Calculations of the accuracy of PET/CT in detecting BM involvement and analysis of the clinical outcomes (progression-free survival [PFS] and overall survival [OS]) according to the BM biopsy status were performed. RESULTS PET/CT exhibited a sensitivity of 64.7% and a specificity of 96.0% in detecting gross BM involvement. For detecting any (both gross and minimal) BM involvement, the sensitivity was 30.4%, while the specificity was 99.0%. Only one patient (0.7%) demonstrated gross BM involvement among the PET-ES group. Survival outcomes of the PET-ES group with minimal BM involvement (3-year PFS, 55.6%; OS, 77.0%) were closer to those of the PET-ES group with no BM involvement (3-year PFS, 62.2%; OS, 80.6%) than to those of the PET-AS group (3-year PFS, 20.1%; OS, 29.9%). CONCLUSION PET/CT exhibits high specificity, but moderate and low sensitivity in detecting gross and minimal BM involvement, respectively. The clinical significance of minimal BM involvement for patients in the PET-ES group may be limited.
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Affiliation(s)
- Tae Hoon Lee
- Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Hyun Ju Kim
- Department of Radiation Oncology, Gachon University Gil Hospital, Incheon, Korea
| | - Jong Hoon Lee
- Department of Radiation Oncology, St. Vincent’s Hospital, College of Medicine, The Catholic University of Korea, Suwon, Korea
| | - Jeongshim Lee
- Department of Radiation Oncology, Inha University Hospital, Inha University School of Medicine, Incheon, Korea
| | - Jin Hee Kim
- Department of Radiation Oncology, Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea
| | - Dongryul Oh
- Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Keun-Yong Eom
- Department of Radiation Oncology, Seoul National University Bundang Hospital, Seongnam, Korea
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Guo L, Wang R, Hou N, Kuang A, Shen G. FDG PET/CT may replace bone marrow biopsy for the evaluation of bone marrow involvement in selected mature T- and natural killer-cell lymphomas: A meta-analysis. Eur J Radiol 2024; 172:111353. [PMID: 38320330 DOI: 10.1016/j.ejrad.2024.111353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Revised: 11/24/2023] [Accepted: 01/29/2024] [Indexed: 02/08/2024]
Abstract
PURPOSE To systematically determine the role of FDG PET/CT for the diagnosis of bone marrow involvement in mature T- and natural killer (NK)-cell lymphomas. METHODS The PubMed, Embase and Cochrane Library databases were searched to identify eligible studies. Data extraction and quality assessment were independently conducted. Then, pooled diagnostic performance with the 95 % confidence interval (CI) was calculated and further analyzed based on different interpretation criteria, tumor type and stage. RESULTS Fifteen studies were eventually included for quantitative analysis. Overall, the methodological quality of included studies was acceptable. For detecting bone marrow involvement, FDG PET/CT achieved a poor sensitivity of 0.62 (95 % CI, 0.48-0.71) and a reasonable specificity of 0.92 (95 % CI, 0.87-0.96). Similar performance was observed for the specific type of extranodal NK/T-cell lymphoma (ENKTCL). In early-stage patients revealed by PET/CT, extremely small proportion (2/777) showed positive bone marrow biopsy, especially for the specific type of ENKTCL, whereas in advanced-stage patients, the specificity of FDG PET/CT dropped to 0.77 (95 % CI, 0.72-0.82). Regarding the interpretation, both diffuse and focal increased uptake patterns as positivity may result in increased sensitivity but decreased specificity compared with focal pattern alone as positivity. CONCLUSIONS FDG PET/CT demonstrated excellent negative predictive value for detecting marrow involvement in early-stage patients with mature T- and NK-cell lymphomas, especially the ENKTCL. Conversely, FDG PET/CT showed poor performance for the diagnosis of bone marrow involvement in advanced-stage patients.
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Affiliation(s)
- Linlin Guo
- Department of Nuclear Medicine, West China Hospital of Sichuan University, No. 37, Guoxue Alley, Chengdu, Sichuan 610041, People's Republic of China
| | - Rang Wang
- Department of Nuclear Medicine, West China Hospital of Sichuan University, No. 37, Guoxue Alley, Chengdu, Sichuan 610041, People's Republic of China
| | - Naifeng Hou
- Department of Nuclear Medicine, West China Hospital of Sichuan University, No. 37, Guoxue Alley, Chengdu, Sichuan 610041, People's Republic of China
| | - Anren Kuang
- Department of Nuclear Medicine, West China Hospital of Sichuan University, No. 37, Guoxue Alley, Chengdu, Sichuan 610041, People's Republic of China
| | - Guohua Shen
- Department of Nuclear Medicine, West China Hospital of Sichuan University, No. 37, Guoxue Alley, Chengdu, Sichuan 610041, People's Republic of China.
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Nakamura T, Tatetsu H, Higuchi Y, Endo S, Shiraishi S, Kawanaka K, Imakane D, Sonoda M, Furuta R, Shichijo T, Honda Y, Karube K, Mikami Y, Nosaka K, Matsuoka M, Yasunaga JI. Extranodal NK/T-cell lymphoma with localized relapse in bone marrow of lower leg detected using PET-CT. J Clin Exp Hematop 2024; 64:45-51. [PMID: 38538318 PMCID: PMC11079990 DOI: 10.3960/jslrt.23046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 11/27/2023] [Accepted: 12/27/2023] [Indexed: 05/12/2024] Open
Abstract
Extranodal natural killer (NK)/T-cell lymphoma (ENKTL) is a rare subtype of non-Hodgkin lymphoma (NHL) with poor prognosis, particularly in relapsed or refractory patients. Thus, timely detection of relapse and appropriate disease management are crucial. We present two patients with ENKTL, wherein positron emission tomography-computed tomography (PET-CT) with total-body coverage after induction therapy, detected newly relapsed regions in the bone marrow of the lower leg prior to progression. Case 1: A 47-year-old woman with nasal obstruction, showing 18F-fluoro-deoxyglucose (FDG) uptake in the nasal cavity (Lugano stage IE). After induction therapy (RT-2/3 DeVIC), PET-CT revealed abnormal uptake only in the right fibula. Case 2: A 68-year-old man with a skin nodule/ulcer and an enlarged right inguinal lymph node was diagnosed with advanced ENKTL. A PET-CT scan revealed abnormal uptake in the subcutaneous mass of the right medial thigh, lymph nodes, and descending colon (Lugano stage IV). After induction therapy, PET-CT revealed new abnormal uptake only in the left tibia. In both patients, CT-guided biopsy confirmed ENKTL recurrence. Moreover, PET-CT with whole-body coverage was useful for the timely assessment of relapse and detection of asymptomatic bone involvement. This approach allowed for modifications to treatment strategies in certain patients.
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Choi WH, Han EJ, O JH, Choi EK, Choi JI, Park G, Choi BO, Jeon YW, Min GJ, Cho SG. Prognostic Value of FDG PET/CT in Patients with Nodal Peripheral T-Cell Lymphoma. Diagnostics (Basel) 2023; 13:2834. [PMID: 37685372 PMCID: PMC10487142 DOI: 10.3390/diagnostics13172834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 08/27/2023] [Accepted: 08/30/2023] [Indexed: 09/10/2023] Open
Abstract
This study evaluated the prognostic significance of FDG PET/CT in patients with nodal peripheral T-cell lymphoma (PTCL). We retrospectively reviewed patients with histologically confirmed nodal PTCL who underwent FDG PET/CT at baseline, after three cycles of first-line chemotherapy (interim), and at the end of therapy. Response was assessed visually using the Deauville 5-point scale (D5PS); scores of 1, 2, and 3 were considered PET-negative, and scores of 4 and 5 were considered PET-positive. The associations between FDG PET/CT findings and survival were assessed using Cox regression analysis. A total of 79 patients (44 males and 35 females; median age 56 years) were included in this study. In response assessment, 17 (22%) had an interim PET-positive result and 10 (13%) had an end-of-therapy PET-positive result. During a median follow-up of 50 months, 37 patients (47%) presented with disease progression and 30 patients (38%) died. The estimated 5-year progression-free survival (PFS) and overall survival (OS) were 57% and 64%, respectively. An interim PET-positive result was the only significant indicator of PFS. Higher International Prognostic Index and end-of-therapy PET-positive result were significant independent prognostic factors of OS. Interim and end-of-therapy FDG PET/CT responses based on D5PS are meaningful in predicting the outcomes of patients with nodal PTCL.
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Affiliation(s)
- Woo Hee Choi
- Division of Nuclear Medicine, Department of Radiology, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea; (W.H.C.); (J.H.O.); (E.K.C.)
| | - Eun Ji Han
- Division of Nuclear Medicine, Department of Radiology, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea; (W.H.C.); (J.H.O.); (E.K.C.)
| | - Joo Hyun O
- Division of Nuclear Medicine, Department of Radiology, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea; (W.H.C.); (J.H.O.); (E.K.C.)
| | - Eun Kyoung Choi
- Division of Nuclear Medicine, Department of Radiology, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea; (W.H.C.); (J.H.O.); (E.K.C.)
| | - Joon-Il Choi
- Department of Radiology, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea;
| | - Gyeongsin Park
- Department of Hospital Pathology, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea;
| | - Byung-Ock Choi
- Department of Radiation Oncology, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea;
| | - Young-Woo Jeon
- Department of Hematology, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea; (Y.-W.J.); (G.-J.M.); (S.-G.C.)
| | - Gi-June Min
- Department of Hematology, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea; (Y.-W.J.); (G.-J.M.); (S.-G.C.)
| | - Seok-Goo Cho
- Department of Hematology, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea; (Y.-W.J.); (G.-J.M.); (S.-G.C.)
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Costa RDO, Pereira J, Lage LADPC, Baiocchi OCG. Extranodal NK-/T-cell lymphoma, nasal type: what advances have been made in the last decade? Front Oncol 2023; 13:1175545. [PMID: 37529691 PMCID: PMC10388588 DOI: 10.3389/fonc.2023.1175545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 06/26/2023] [Indexed: 08/03/2023] Open
Abstract
Extranodal NK-/T-cell lymphoma (ENKTCL) is a rare and highly aggressive malignancy with significant racial and geographic variations worldwide. In addition to the formerly "nasal-type" initial description, these lymphomas are predominantly extranodal in origin and typically cause vascular damage and tissue destruction, and although not fully understood, Epstein-Barr virus (EBV) has an important role in its pathogenesis. Initial assessment must include a hematopathology review of representative and viable tumor areas without necrosis for adequate immunohistochemistry studies, including EBV-encoded small RNA (EBER) in situ hybridization (ISH). Positron emission tomography with 18-fluorodeoxyglucose (18F-FDG-PET/CT) for accurate staging is essential, and most patients will have localized disease (IE/IIE) at diagnosis. Apart from other T-cell malignancies, the best treatment even for localized cases is combined modality therapy (chemotherapy plus radiotherapy) with non-anthracycline-based regimens. For advanced-stage disease, l-asparaginase-containing regimens have shown improved survival, but relapsed and refractory cases have very poor outcomes. Nowadays, even with a better understanding of pathogenic pathways, up-front therapy is completely based on chemotherapy and radiotherapy, and treatment-related mortality is not low. Future strategies targeting signaling pathways and immunotherapy are evolving, but we need to better identify those patients with dismal outcomes in a pre-emptive way. Given the rarity of the disease, international collaborations are urgently needed, and clinical trials are the way to change the future.
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Affiliation(s)
- Renata de Oliveira Costa
- Department of Hematology, Faculdade de Ciências Médicas de Santos (FCMS), Centro Universitário Lusíadas (Unilus), Santos, São Paulo, Brazil
- Hospital Alemao Osvaldo Cruz (HAOC), São Paulo, Brazil
| | - Juliana Pereira
- Hospital Alemao Osvaldo Cruz (HAOC), São Paulo, Brazil
- Department of Hematology, Hemotherapy and Cell Therapy, Faculdade de Medicina da Universidade de Sao Paulo (FM-USP), São Paulo, Brazil
- Laboratory of Medical Investigation in Pathogenesis and Directed Therapy in Onco-Immuno-Hematology (LIM-31), University of Sao Paulo (USP), São Paulo, Brazil
| | - Luís Alberto de Pádua Covas Lage
- Department of Hematology, Hemotherapy and Cell Therapy, Faculdade de Medicina da Universidade de Sao Paulo (FM-USP), São Paulo, Brazil
- Laboratory of Medical Investigation in Pathogenesis and Directed Therapy in Onco-Immuno-Hematology (LIM-31), University of Sao Paulo (USP), São Paulo, Brazil
| | - Otávio César Guimarães Baiocchi
- Hospital Alemao Osvaldo Cruz (HAOC), São Paulo, Brazil
- Department of Hematology, Universidade Federal de Sao Paulo (Unifesp), São Paulo, Brazil
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Yu M, Chen Z, Wang Z, Fang X, Li X, Ye H, Lin T, Huang H. Diagnostic and prognostic value of pretreatment PET/CT in extranodal natural killer/T-cell lymphoma: a retrospective multicenter study. J Cancer Res Clin Oncol 2023:10.1007/s00432-023-04828-6. [PMID: 37148293 DOI: 10.1007/s00432-023-04828-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 04/28/2023] [Indexed: 05/08/2023]
Abstract
PURPOSE The objective of this research was to assess the utility of positron emission tomography combined with computed tomography (PET/CT) to detect bone marrow invasion (BMI) and the predictive value of PET/CT in extranodal natural killer/T-cell lymphoma (ENKTL) patients. PATIENTS AND METHODS This multicentre study enrolled ENKTL patients who underwent pretherapy PET/CT and bone marrow biopsy (BMB). The specificity, sensitivity, negative predictive value (NPV), and positive predictive value (PPV) of PET/CT and BMB for BMI were evaluated. Multivariate analysis was used to identify predictive parameters for constructing a nomogram. RESULTS Seven hundred and forty-eight patients were identified from four hospitals, with eighty (10.7%) having focal skeletal lesions on PET/CT and fifty (6.7%) having positive BMB. When BMB is considered as the gold standard, the specificity, sensitivity, PPV, and NPV of PET/CT for diagnosing BMI were found to be 93.8%, 74.0%, 46.3%, and 98.1%, respectively. PET/CT-positive individuals showed significantly worse OS than PET/CT-negative patients in the subgroup of BMB-negative cases. The nomogram model created according to the significant risk factors from multivariate analysis performed well in predicting survival probability. CONCLUSION PET/CT offers a superior degree of precision for determining BMI in ENKTL. A nomogram model including the parameters of PET/CT can predict survival probability and may help in applying appropriate personalized therapy.
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Affiliation(s)
- Mingjie Yu
- Department of Medical Oncology, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, and Collaborative Innovation Center of Cancer Medicine, 651 Dongfeng Road East, Guangzhou, 510060, Guangdong, China
| | - Zegeng Chen
- Department of Medical Oncology, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, and Collaborative Innovation Center of Cancer Medicine, 651 Dongfeng Road East, Guangzhou, 510060, Guangdong, China
| | - Zhao Wang
- Department of Medical Oncology, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, and Collaborative Innovation Center of Cancer Medicine, 651 Dongfeng Road East, Guangzhou, 510060, Guangdong, China
| | - Xiaojie Fang
- Department of Medical Oncology, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, and Collaborative Innovation Center of Cancer Medicine, 651 Dongfeng Road East, Guangzhou, 510060, Guangdong, China
| | - Xi Li
- Department of Medical Oncology, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, and Collaborative Innovation Center of Cancer Medicine, 651 Dongfeng Road East, Guangzhou, 510060, Guangdong, China
| | - Haimei Ye
- Department of Medical Oncology, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, and Collaborative Innovation Center of Cancer Medicine, 651 Dongfeng Road East, Guangzhou, 510060, Guangdong, China
| | - Tongyu Lin
- Department of Medical Oncology, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, and Collaborative Innovation Center of Cancer Medicine, 651 Dongfeng Road East, Guangzhou, 510060, Guangdong, China.
- Department of Medical Oncology, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Hospital and Institute, Sichuan Cancer Center, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu, China.
| | - He Huang
- Department of Medical Oncology, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, and Collaborative Innovation Center of Cancer Medicine, 651 Dongfeng Road East, Guangzhou, 510060, Guangdong, China.
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Yang C, Wu W, Zhou H, Zhao S, Tian R, Xiang M, Zou L. 18F-FDG PET/CT Plays a Limited Role in Replacing Bone Marrow Biopsy for Newly Diagnosed Advanced-Stage Patients With Extranodal Natural Killer/T-Cell Lymphoma. Front Oncol 2022; 12:894804. [PMID: 35965550 PMCID: PMC9372794 DOI: 10.3389/fonc.2022.894804] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Accepted: 06/21/2022] [Indexed: 11/26/2022] Open
Abstract
Purpose The role of 18F-2-fluoro-2-deoxy-D-glucose positron emission tomography/computed tomography (18F-FDG PET/CT) in evaluating bone marrow (BM) involvement (BMI) among patients with extranodal natural killer/T-cell lymphoma (ENKTL) is poorly understood. This study investigated whether PET/CT could replace bone marrow biopsy (BMB) in treatment-naive ENKTL patients. Methods Newly diagnosed ENKTL patients (n = 356) who received BMB and PET/CT to evaluate BMI at the time of diagnosis were retrospectively reviewed at West China Hospital between August 2008 and January 2020. The BMI diagnosis was confirmed using BM histology. Clinical characteristics, survival outcomes, and prognostic indicators were summarized and analyzed. Results The cohort included 356 cases, of whom 261 were diagnosed with early-stage and 95 with advanced-stage ENKTL by PET/CT before initial treatment. No early-stage patients were identified with BMI by either BMB or PET/CT. Among the advanced-stage patients, 26 were BMB positive, and 12 of 22 patients (54.5%) with positive PET/BM results were also BMB positive. The sensitivity and specificity of PET/CT to detect BMI were 46% and 97%, respectively. The progression-free survival (PFS) and overall survival (OS) of PET/BM-negative patients were markedly longer (p = 0.010 and p = 0.001 for PFS and OS, respectively), which was consistent with the results of the BMB (p = 0.000 for both PFS and OS). Conclusion Although 18F-FDG PET/CT showed the potential to replace BMB in the initial staging of early-stage ENKTL patients, baseline PET/CT cannot provide an accurate BMI evaluation for advanced-stage patients. A prospective study is required to confirm the diagnostic performance of BMI identification by PET/CT, along with targeted BMB and MRI for advanced-stage patients.
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Affiliation(s)
- Chunli Yang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, China
| | - Wanchun Wu
- Department of Oncology, West China Hospital, Sichuan University, Chengdu, China
| | - Huijie Zhou
- Department of Oncology, West China Hospital, Sichuan University, Chengdu, China
| | - Sha Zhao
- Department of Pathology, West China Hospital, Sichuan University, Chengdu, China
| | - Rong Tian
- Department of Nuclear Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Maya Xiang
- Department of Chemistry, University of Washington-Seattle Campus, Seattle, WA, United States
| | - Liqun Zou
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, China
- Department of Oncology, West China Hospital, Sichuan University, Chengdu, China
- *Correspondence: Liqun Zou,
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Chen Z, Fang X, Huang H, Wang Z, Hong H, Chen M, Ren Q, Yao Y, Zhang L, Tian Y, Lin S, Lin T. A proposal for a prognostic index for non-nasal type natural killer/T cell lymphoma after asparaginase-based treatment. Ann Hematol 2020; 99:2811-2819. [PMID: 32975588 DOI: 10.1007/s00277-020-04278-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Accepted: 09/17/2020] [Indexed: 11/27/2022]
Abstract
In the era of asparaginase-based therapy for extranodal natural killer/T cell lymphoma (ENKTL), the clinical outcomes of ENKTL have notably improved. However, as a rare subtype of ENKTL, the therapeutic effect and prognostic factors of non-nasal type ENKTL remain unclear. Thus, we performed this study to analyze the clinical characteristics and to establish a prognostic model specifically for the non-nasal disease. We performed a retrospective study of consecutive patients newly diagnosed with non-nasal type ENKTL and mainly received asparaginase-based therapy at Sun Yat-sen University Cancer Center (SYSUCC) between January 2011 and December 2019, to analyze the prognostic factors and to propose a prognostic model. We validated the prognostic model in an independent cohort. In total, 98 non-nasal type ENKTL patients were included in the training cohort. Multivariate analyses showed that prognostic factors for OS were elevated LDH levels, involvement of bone marrow and serum total protein (TP) < 60 g/L. We developed a new prognostic model named the non-nasal type ENKTL prognostic index (NPI) by grouping the prognostic factors: group 1, no risk factors; group 2, one risk factor; and group 3, two or three risk factors, which were associated with 3-year OS rates of 84.1% (95% CI, 70.9-97.2), 46.8% (27.7-65.8), and 14.9% (0-32.9), respectively (P < 0.001). These results were validated and confirmed in an independent cohort. The new model is efficient in distinguishing non-nasal-type ENKTL patients with various outcomes in the contemporary era of asparaginase-based therapy.
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Affiliation(s)
- Zegeng Chen
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in Southern China, and Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Xiaojie Fang
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in Southern China, and Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - He Huang
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in Southern China, and Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Zhao Wang
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in Southern China, and Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Huangming Hong
- Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Meiting Chen
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in Southern China, and Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Quanguang Ren
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in Southern China, and Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Yuyi Yao
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in Southern China, and Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Limei Zhang
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in Southern China, and Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Ying Tian
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in Southern China, and Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Suxia Lin
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in Southern China, and Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Tongyu Lin
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in Southern China, and Collaborative Innovation Center of Cancer Medicine, Guangzhou, China. .,Department of Medical Oncology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in Southern China, and Collaborative Innovation Center of Cancer Medicine, 651 Dongfeng Road East, Guangzhou, 510060, Guangdong, China.
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10
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Ghesani N, Gavane S, Hafez A, Kostakoglu L. PET in Lymphoma. Clin Nucl Med 2020. [DOI: 10.1007/978-3-030-39457-8_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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11
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Wang Y, Xie L, Tian R, Deng Y, Zhang W, Zou L, Zhang H, Liu J, Zhao S, Ding W, Liu W, Jiang M. PET/CT-based bone-marrow assessment shows potential in replacing routine bone-marrow biopsy in part of patients newly diagnosed with extranodal natural killer/T-cell lymphoma. J Cancer Res Clin Oncol 2019; 145:2529-2539. [DOI: 10.1007/s00432-019-02957-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Accepted: 06/19/2019] [Indexed: 01/19/2023]
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12
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13
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Ding JJ, Chen YL, Zhou SH, Zhao K. Positron emission tomography/computed tomography in the diagnosis, staging, and prognostic evaluation of natural killer/T-cell lymphoma. J Int Med Res 2018; 46:4920-4929. [PMID: 30328364 PMCID: PMC6300951 DOI: 10.1177/0300060518804375] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Natural killer/T-cell lymphoma (NKTL) is a rare subtype of non-Hodgkin's lymphoma that is associated with Epstein-Barr virus infection. The clinicopathological features of NKTL are unique among lymphomas. NKTL is an aggressive disease with a poor prognosis in the absence of effective treatment. Accurate diagnosis and staging are essential to ensure an appropriate treatment strategy and accurate prognosis of NKTL. 18F-Fluorodexoyglucose-positron emission tomography/computed tomography (18F-FDG PET/CT) is a valuable technique in the diagnosis, staging, and prognostic evaluation of various types of malignant tumors, including NKTL. PET/CT imaging studies of patients with NKTL have shown that NKTL is 18F-FDG-avid and that PET/CT is superior to conventional methods in detecting cutaneous and extracutaneous lesions. We herein review recent PET/CT studies that have provided considerable insight into the diagnosis, staging, prognostic evaluation, and treatment effectiveness in patients with NKTL.
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Affiliation(s)
- Jian-Jun Ding
- 1 Department of Otolaryngology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Zhejiang Province, China.,2 Department of Otolaryngology, The First People's Hospital of Linhai City, Zhejiang Province, China
| | - Ya-Lian Chen
- 1 Department of Otolaryngology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Zhejiang Province, China
| | - Shui-Hong Zhou
- 1 Department of Otolaryngology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Zhejiang Province, China
| | - Kui Zhao
- 3 Department of PET/CT, The First Affiliated Hospital, College of Medicine, Zhejiang University, Zhejiang Province, China
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14
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Pak K, Kim BS, Kim K, Kim IJ, Jun S, Jeong YJ, Shim HK, Kim SD, Cho KS. Prognostic significance of standardized uptake value on F18-FDG PET/CT in patients with extranodal nasal type NK/T cell lymphoma: A multicenter, retrospective analysis. Am J Otolaryngol 2018; 39:1-5. [PMID: 29056243 DOI: 10.1016/j.amjoto.2017.10.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Accepted: 10/10/2017] [Indexed: 11/30/2022]
Abstract
OBJECTIVES The purpose of this study was to evaluate the value of parameters assessed with F18-flurodeoxyglucose (FDG) positron emission tomography/computed tomography (PET/CT) in predicting relapse free survival and overall survival in patients with extranodal nasal type NK/T cell lymphoma. METHODS Thirty-six patients with extranodal nasal type NK/T cell lymphoma, and who underwent PET/CT prior to curative treatment, were enrolled at five institutions. Volumes of interest covering the entire tumor volume were delineated on PET/CT images, and the maximum standardized uptake value (SUVmax), mean SUV (SUVmean), metabolic tumor volume (MTV), and total lesion glycolysis (TLG) were measured using thresholds of 40% of SUVmax. Furthermore, we compared the difference in F18-FDG avidity according to Epstein-Barr virus (EBV) infection status. RESULTS The SUVmax (p=0.041) and SUVmean (p=0.049) in patients who died were higher than the respective values of those who survived. A higher TLG (>45.8) was associated with relapse free survival (HR 7.856, p=0.034). Ann Arbor stage (III-IV, HR 14.12, p=0.004), and a higher SUVmax (>12.6, p=0.024) and SUVmean (>6.4, p=0.024) were associated with poor survival. However, neither the MTV nor the TLG (volumetric parameters) were significant predictors of death. The PET parameters SUVmax (p=0.181), SUVmean (p=0.237), MTV (p=0.636), and TLG (p=0.469) did not differ significantly between patients with and without EBV infections. CONCLUSIONS High TLG was the only significant predictive factor on relapse free survival. The SUVmax and SUVmean measured by F18-FDG PET/CT could be significant prognostic factors in patients with extranodal nasal type NK/T cell lymphoma.
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Affiliation(s)
- Kyoungjune Pak
- Department of Nuclear Medicine and Biomedical Research Institute, Pusan National University Hospital, Busan, Republic of Korea
| | - Bum Soo Kim
- Department of Nuclear Medicine and Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Republic of Korea
| | - Keunyoung Kim
- Department of Nuclear Medicine and Biomedical Research Institute, Pusan National University Hospital, Busan, Republic of Korea
| | - In Joo Kim
- Department of Nuclear Medicine and Biomedical Research Institute, Pusan National University Hospital, Busan, Republic of Korea
| | - Sungmin Jun
- Department of Nuclear Medicine, Kosin University Gospel Hospital, Busan, Republic of Korea
| | - Young Jin Jeong
- Department of Nuclear Medicine, Dong-A University Medical Center, Busan, Republic of Korea
| | - Hye Kyung Shim
- Department of Nuclear Medicine, Inje University Haeundae Paik Hospital, Busan, Republic of Korea
| | - Sung-Dong Kim
- Department of Otorhinolaryngology and Biomedical Research Institute, Pusan National University School of Medicine, Pusan National University Hospital, Busan, South Korea
| | - Kyu-Sup Cho
- Department of Otorhinolaryngology and Biomedical Research Institute, Pusan National University School of Medicine, Pusan National University Hospital, Busan, South Korea.
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15
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Öner AO, Sürer Budak E, Aydın F, Salim O, Yücel OK, Akkaya B, Toptaş T, Boz A, Yıldız A, Güngör F, Undar L. Efficacy of 18F-2-fluoro-2-deoxy-D-glucose Positron Emission Tomography/Computerized Tomography for Bone Marrow Infiltration Assessment in the Initial Staging of Lymphoma. Mol Imaging Radionucl Ther 2017; 26:69-75. [PMID: 28613199 PMCID: PMC5472089 DOI: 10.4274/mirt.54376] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
Objective: Currently 18F-2-fluoro-2-deoxy-D-glucose (18F-FDG) positron emission tomography/computerized tomography (PET/CT) is being successfully used for staging and follow-up of Hodgkin’s lymphoma (HL) and non-Hodgkin’s lymphoma (NHL). Various studies have demonstrated that PET/CT effectively detects bone marrow involvement (BMI) and is concordant with bone marrow biopsy (BMB) findings, thus it is deemed as a complementary method. This study was aimed to evaluate 18F-FDG-PET/CT efficiency for detection of BMI in HL and NHL. Methods: The study included 172 lymphoma cases who were admitted to Akdeniz University Medical School Department of Nuclear Medicine for initial staging with PET/CT. Visual and semiquantitative assessments were performed for PET/CT scan findings of the cases. The maximum standard uptake (SUVmax) value was the quantitative parameter used for 18F-FDG-PET scan. In visual assessment, bone marrow metabolic activity that is greater than the liver was considered as pathologic. For semiquantitative assessment, regions of interest were drawn for SUVmax estimation, which included iliac crest in cases with diffusely increased metabolic activity and the highest activity area in cases with focal involvement. BMB was considered as the reference test. Results: On visual assessment of all the cases, PET/CT was found to yield 31% sensitivity and 85% specificity rate for detection of BMI. On visual assessment of HL cases, sensitivity rate was determined as 80%, and specificity as 78%, while in NHL cases the corresponding values were 24% and 90%, respectively. On semiquantitative assessment of HL cases, considering SUVmax≥4, sensitivity was found as 80% and specificity as 68%. In NHL patients, considering SUVmax≥3.2, sensitivity rate was detected as 65% and specificity as 58%. Conclusion: In this study, a moderately high concordance was observed between PET/CT and BMB findings. PET/CT appears to be a significant method for detecting BMI. Although PET/CT is not a substitute for BMB, we suggest it can be used as a guide to biopsy site and a complementary imaging technique for BMB.
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Affiliation(s)
- Ali Ozan Öner
- Afyon Kocatepe University Faculty of Medicine, Department of Nuclear Medicine, Afyonkarahisar, Turkey
| | - Evrim Sürer Budak
- Antalya Training and Research Hospital, Clinic of Nuclear Medicine, Antalya, Turkey
| | - Funda Aydın
- Akdeniz University Faculty of Medicine, Department of Nuclear Medicine, Antalya, Turkey
| | - Ozan Salim
- Akdeniz University Faculty of Medicine, Department of Hematology, Antalya, Turkey
| | - Orhan Kemal Yücel
- Akdeniz University Faculty of Medicine, Department of Hematology, Antalya, Turkey
| | - Bahar Akkaya
- Akdeniz University Faculty of Medicine, Department of Pathology, Antalya, Turkey
| | - Tayfur Toptaş
- Marmara University Faculty of Medicine, Department of Hematology, İstanbul, Turkey
| | - Adil Boz
- Akdeniz University Faculty of Medicine, Department of Nuclear Medicine, Antalya, Turkey
| | - Akın Yıldız
- Akdeniz University Faculty of Medicine, Department of Nuclear Medicine, Antalya, Turkey
| | - Fırat Güngör
- Akdeniz University Faculty of Medicine, Department of Nuclear Medicine, Antalya, Turkey
| | - Levent Undar
- Akdeniz University Faculty of Medicine, Department of Hematology, Antalya, Turkey
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Pham AQ, Broski SM, Habermann TM, Jevremovic D, Wiseman GA, Feldman AL, Maurer MJ, Ristow KM, Witzig TE. Accuracy of 18-F FDG PET/CT to detect bone marrow clearance in patients with peripheral T-cell lymphoma - tissue remains the issue. Leuk Lymphoma 2017; 58:2342-2348. [PMID: 28290723 DOI: 10.1080/10428194.2017.1300891] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Staging of peripheral T-cell non-Hodgkin lymphoma (PTCL) is determined by 18-F FDG PET scan and bone marrow biopsy. This study addressed the accuracy of PET at detecting bone marrow (BM) involvement at restaging in patients with known involvement pretreatment. We identified patients with biopsy proven BM PTCL at diagnosis and concomitant BM and PET at the end of therapy. Pre-treatment PET demonstrated 50% (8/16) had a false-negative PET scan of the BM. After induction, repeat biopsy revealed 62.5% (10/16) with BM involvement. Of these 10, two had a positive PET; eight were false negative by PET. Of the six patients with a negative posttherapy BM biopsy, four were PET negative and two false positive. The sensitivity of PET at end of treatment was 20% (2/10) with a specificity of 66.7% (4/6). PET/CT is not an accurate predictor of BM involvement in patients with known PTCL in the marrow.
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Affiliation(s)
- Anthony Q Pham
- a Division of Hematology , Mayo Clinic , Rochester , MN , USA
| | | | | | - Dragan Jevremovic
- c Department of Laboratory Medicine and Pathology , Mayo Clinic , Rochester , MN , USA
| | | | - Andrew L Feldman
- c Department of Laboratory Medicine and Pathology , Mayo Clinic , Rochester , MN , USA
| | - Matthew J Maurer
- d Department of Health Science Research, Health Sciences Research , Mayo Clinic , Rochester , MN , USA
| | - Kay M Ristow
- a Division of Hematology , Mayo Clinic , Rochester , MN , USA
| | - Thomas E Witzig
- a Division of Hematology , Mayo Clinic , Rochester , MN , USA
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17
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Yang SR, Lan XL. [Value of PET-CT clinical application in extranodal NK/T cell lymphoma]. ZHONGHUA XUE YE XUE ZA ZHI = ZHONGHUA XUEYEXUE ZAZHI 2016; 37:1094-1099. [PMID: 28088979 PMCID: PMC7348500 DOI: 10.3760/cma.j.issn.0253-2727.2016.12.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
| | - X L Lan
- Department of Nuclear Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology; Hubei Province Key Laboratory of Molecular Imaging, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
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18
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Ujjani CS, Hill EM, Wang H, Nassif S, Esposito G, Ozdemirli M, Cordova C, Cheson BD. (18) F-FDG PET-CT and trephine biopsy assessment of bone marrow involvement in lymphoma. Br J Haematol 2016; 174:410-6. [PMID: 27098364 DOI: 10.1111/bjh.14071] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 01/26/2016] [Indexed: 11/29/2022]
Abstract
The ability of positron emission tomography-computerized tomography (PET-CT) to accurately detect bone marrow involvement (BMI) has been suggested in Hodgkin lymphoma (HL) and diffuse large B-cell lymphoma (DLBCL), but its abilities in other histologies is less established. The aim of this retrospective study was to confirm the role of PET-CT in detecting BMI in DLBCL and HL, and to explore its usefulness in other subtypes. Of the 149 newly diagnosed patients, common subtypes included DLBCL, follicular lymphoma (FL) and HL. In DLBCL, the sensitivity and specificity of PET-CT at diagnosis were 75% and 92%. In FL, the sensitivity and specificity of PET-CT were 67% and 85% at diagnosis, and 73% and 89% at relapse. In HL, the sensitivity and specificity were 100% and 74%. PET-CT was able to detect BMI in patients with negative biopsies. Most of the patients in which PET-CT failed to identify BMI were already advanced stage by imaging. In this analysis, PET-CT was highly accurate for detecting BMI at diagnosis in DLBCL and HL and highly specific in FL at diagnosis and relapse. Results also suggested the diagnostic advantage of PET-CT over bone marrow biopsy in detecting BMI. Prospective evaluation is necessary and may eliminate biopsies in future patients.
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Affiliation(s)
- Chaitra S Ujjani
- Lombardi Comprehensive Cancer Center, Medstar Georgetown University Hospital, Washington, DC, USA
| | - Elizabeth M Hill
- Lombardi Comprehensive Cancer Center, Medstar Georgetown University Hospital, Washington, DC, USA
| | - Hongkun Wang
- Department of Biostatistics, Medstar Georgetown University Hospital, Washington, DC, USA
| | - Samer Nassif
- Department of Pathology, Medstar Georgetown University Hospital, Washington, DC, USA
| | - Giuseppe Esposito
- Department of Nuclear Medicine, Medstar Georgetown University Hospital, Washington, DC, USA
| | - Metin Ozdemirli
- Department of Pathology, Medstar Georgetown University Hospital, Washington, DC, USA
| | - Christine Cordova
- Lombardi Comprehensive Cancer Center, Medstar Georgetown University Hospital, Washington, DC, USA
| | - Bruce D Cheson
- Lombardi Comprehensive Cancer Center, Medstar Georgetown University Hospital, Washington, DC, USA
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