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Watanabe M, Leyser S, Theysohn J, Schaarschmidt B, Ludwig J, Fendler WP, Moraitis A, Lahner H, Mathew A, Herrmann K, Weber M. Dose-Response Relationship in Patients with Liver Metastases from Neuroendocrine Neoplasms Undergoing Radioembolization with 90Y Glass Microspheres. J Nucl Med 2024; 65:1175-1180. [PMID: 38906556 DOI: 10.2967/jnumed.124.267774] [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: 03/13/2024] [Accepted: 05/30/2024] [Indexed: 06/23/2024] Open
Abstract
The benefit of multicompartment dosimetry in the radioembolization of neuroendocrine neoplasms is not firmly established. We retrospectively assessed its potential with patient outcome. Methods: Forty-three patients were eligible. The association of mean absorbed dose (MAD) for tumors and treatment response was tested per lesion with a receiver operating characteristic curve analysis, and the association of MAD with progression-free survival (PFS) and overall survival was tested per patient using uni- and multivariate Cox regression analyses. Results: The area under the curve for treatment response based on MAD was 0.79 (cutoff, 196.6 Gy; P < 0.0001). For global PFS, grade (grade 2 vs. 1: hazard ratio [HR], 2.51; P = 0.042; grade 3 vs. 1: HR, 62.44; P < 0.001), tumor origin (HR, 6.58; P < 0.001), and MAD (HR, 0.998; P = 0.003) were significant. For overall survival, no prognostic parameters were significant. Conclusion: In line with prior publications, a MAD of more than 200 Gy seemed to favor treatment response. MAD was also associated with PFS and may be of interest for radioembolization planning for neuroendocrine neoplasm patients.
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Affiliation(s)
- Masao Watanabe
- Department of Nuclear Medicine, University Clinic Essen, Essen, Germany;
- University of Duisburg-Essen and German Cancer Consortium-University Hospital, Essen, Germany
| | - Stephan Leyser
- Department of Nuclear Medicine, University Clinic Essen, Essen, Germany
- University of Duisburg-Essen and German Cancer Consortium-University Hospital, Essen, Germany
| | - Jens Theysohn
- University of Duisburg-Essen and German Cancer Consortium-University Hospital, Essen, Germany
- Institute of Diagnostic and Interventional Radiology and Neuroradiology, University Clinic Essen, Essen, Germany
| | - Benedikt Schaarschmidt
- University of Duisburg-Essen and German Cancer Consortium-University Hospital, Essen, Germany
- Institute of Diagnostic and Interventional Radiology and Neuroradiology, University Clinic Essen, Essen, Germany
| | - Johannes Ludwig
- Department of Radiology and Nuclear Medicine, University Medical Center Mannheim, Heidelberg University, Mannheim, Germany; and
| | - Wolfgang P Fendler
- Department of Nuclear Medicine, University Clinic Essen, Essen, Germany
- University of Duisburg-Essen and German Cancer Consortium-University Hospital, Essen, Germany
| | - Alexandros Moraitis
- Department of Nuclear Medicine, University Clinic Essen, Essen, Germany
- University of Duisburg-Essen and German Cancer Consortium-University Hospital, Essen, Germany
| | - Harald Lahner
- Department of Endocrinology, Diabetes, and Metabolism and Division of Laboratory Research, University Clinic Essen, Essen, Germany
| | - Annie Mathew
- Department of Endocrinology, Diabetes, and Metabolism and Division of Laboratory Research, University Clinic Essen, Essen, Germany
| | - Ken Herrmann
- Department of Nuclear Medicine, University Clinic Essen, Essen, Germany
- University of Duisburg-Essen and German Cancer Consortium-University Hospital, Essen, Germany
| | - Manuel Weber
- Department of Nuclear Medicine, University Clinic Essen, Essen, Germany
- University of Duisburg-Essen and German Cancer Consortium-University Hospital, Essen, Germany
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Warfvinge CF, Gustafsson J, Roth D, Tennvall J, Svensson J, Bernhardt P, Åkesson A, Wieslander E, Sundlöv A, Sjögreen Gleisner K. Relationship Between Absorbed Dose and Response in Neuroendocrine Tumors Treated with [ 177Lu]Lu-DOTATATE. J Nucl Med 2024; 65:1070-1075. [PMID: 38724277 DOI: 10.2967/jnumed.123.266991] [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: 11/16/2023] [Accepted: 03/26/2024] [Indexed: 07/03/2024] Open
Abstract
Peptide receptor radionuclide therapy presents the possibility of tracing and quantifying the uptake of the drug in the body and performing dosimetry, potentially allowing individualization of treatment schemes. However, the details of how neuroendocrine tumors (NETs) respond to different absorbed doses are insufficiently known. Here, we investigated the relationship between tumor-absorbed dose and tumor response in a cohort of patients with NETs treated with [177Lu]Lu-DOTATATE. Methods: This was a retrospective study based on 69 tumors in 32 patients treated within a clinical trial. Dosimetry was performed at each cycle of [177Lu]Lu-DOTATATE, rendering 366 individual absorbed dose assessments. Hybrid planar-SPECT/CT imaging using [177Lu]Lu-DOTATATE was used, including quantitative SPECT reconstruction, voxel-based absorbed dose rate calculation, semiautomatic image segmentation, and partial-volume correction. Changes in tumor volume were used to determine tumor response. The volume for each tumor was manually delineated on consecutive CT scans, giving a total of 712 individual tumor volume assessments. Tumors were stratified according to grade. The relationship between absorbed dose and response was investigated using mixed-effects models and logistic regression. Tumors smaller than 4 cm3 were excluded. Results: In grade 2 NETs, a clear relationship between absorbed dose and volume reduction was observed. Our observations suggest a 90% probability of partial tumor response for an accumulated tumor-absorbed dose of at least 135 Gy. Conclusion: Our findings are in accordance with previous observations regarding the relationship between tumor shrinkage and absorbed dose. Moreover, our data suggest an absorbed dose threshold for partial response in grade 2 NETs. These observations provide valuable insights for the design of dosimetry-guided peptide receptor radionuclide therapy schemes.
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Affiliation(s)
- Carl Fredrik Warfvinge
- Department of Hematology, Oncology, and Radiation Physics, Skåne University Hospital, Lund, Sweden;
- Division of Oncology, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | | | - Daniel Roth
- Medical Radiation Physics, Lund University, Lund, Sweden
| | - Jan Tennvall
- Division of Oncology, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Johanna Svensson
- Department of Oncology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Peter Bernhardt
- Department of Medical Physics and Biomedical Engineering, Sahlgrenska University Hospital, Gothenburg, Sweden
- Department of Medical Radiation Sciences, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden; and
| | - Anna Åkesson
- Clinical Studies Sweden, Forum South, Skåne University Hospital, Lund, Sweden
| | - Elinore Wieslander
- Department of Hematology, Oncology, and Radiation Physics, Skåne University Hospital, Lund, Sweden
| | - Anna Sundlöv
- Division of Oncology, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
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Ramdhani K, Beijer-Verduin J, Ebbers SC, van Rooij R, Smits MLJ, Bruijnen RCG, de Jong HWAM, Lam MGEH, Braat AJAT. Dose-effect relationships in neuroendocrine tumour liver metastases treated with [ 166Ho]-radioembolization. Eur J Nucl Med Mol Imaging 2024; 51:2114-2123. [PMID: 38369678 PMCID: PMC11139696 DOI: 10.1007/s00259-024-06645-6] [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: 12/11/2023] [Accepted: 02/05/2024] [Indexed: 02/20/2024]
Abstract
PURPOSE Aim of this study was to investigate a dose-response relationship, dose-toxicity relationship, progression free survival (PFS) and overall survival (OS) in neuroendocrine tumour liver metastases (NELM) treated with holmium-166-microspheres radioembolization ([166Ho]-radioembolization). MATERIALS AND METHODS Single center, retrospective study included patients with NELM that received [166Ho]-radioembolization with post-treatment SPECT/CT and CECT or MRI imaging for 3 months follow-up. Post-treatment SPECT/CT was used to calculate tumour (Dt) and whole liver healthy tissue (Dh) absorbed dose. Clinical and laboratory toxicity was graded by Common Terminology Criteria for Adverse Events (CTCAE), version 5 at baseline and three-months follow-up. Response was determined according to RECIST 1.1. The tumour and healthy doses was correlated to lesion-based objective response and patient-based toxicity. Kaplan Meier analyses were performed for progression free survival (PFS) and overall survival (OS). RESULTS Twenty-seven treatments in 25 patients were included, with a total of 114 tumours. Median follow-up was 14 months (3 - 82 months). Mean Dt in non-responders was 68 Gy versus 118 Gy in responders, p = 0.01. ROC analysis determined 86 Gy to have the highest sensitivity and specificity, resp. 83% and 81%. Achieving a Dt of ≥ 120 Gy provided the highest likelihood of response (90%) for obtaining response. Sixteen patients had grade 1-2 clinical toxicity and only one patient grade 3. No clear healthy liver dose-toxicity relationship was found. The median PFS was 15 months (95% CI [10.2;19.8]) and median OS was not reached. CONCLUSION This study confirms the safety and efficacy of [166Ho]-radioembolization in NELM in a real-world setting. A clear dose-response relationship was demonstrated and future studies should aim at a Dt of ≥ 120 Gy, being predictive of response. No dose-toxicity relationship could be established.
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Affiliation(s)
- K Ramdhani
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, Heidelberglaan 100, Huispostnummer E01.132, Utrecht, The Netherlands.
| | - J Beijer-Verduin
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, Heidelberglaan 100, Huispostnummer E01.132, Utrecht, The Netherlands
| | - S C Ebbers
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, Heidelberglaan 100, Huispostnummer E01.132, Utrecht, The Netherlands
| | - R van Rooij
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, Heidelberglaan 100, Huispostnummer E01.132, Utrecht, The Netherlands
| | - M L J Smits
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, Heidelberglaan 100, Huispostnummer E01.132, Utrecht, The Netherlands
| | - R C G Bruijnen
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, Heidelberglaan 100, Huispostnummer E01.132, Utrecht, The Netherlands
| | - H W A M de Jong
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, Heidelberglaan 100, Huispostnummer E01.132, Utrecht, The Netherlands
| | - M G E H Lam
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, Heidelberglaan 100, Huispostnummer E01.132, Utrecht, The Netherlands
| | - A J A T Braat
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, Heidelberglaan 100, Huispostnummer E01.132, Utrecht, The Netherlands
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Hoogenkamp DS, de Wit-van der Veen LJ, Huizing DMV, Tesselaar MET, van Leeuwaarde RS, Stokkel MPM, Lam MGEH, Braat AJAT. Advances in Radionuclide Therapies for Patients with Neuro-endocrine Tumors. Curr Oncol Rep 2024; 26:551-561. [PMID: 38598035 PMCID: PMC11062977 DOI: 10.1007/s11912-024-01521-w] [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] [Accepted: 03/21/2024] [Indexed: 04/11/2024]
Abstract
PURPOSE OF REVIEW To provide insights into the role of peptide receptor radionuclide therapy (PRRT) in patients with advanced neuroendocrine tumors (NET) and an overview of possible strategies to combine PRRT with locoregional and systemic anticancer treatments. RECENT FINDINGS Research on combining PRRT with other treatments encompasses a wide variety or treatments, both local (transarterial radioembolization) and systemic therapies, chemotherapy (i.e., capecitabine and temozolomide), targeted therapies (i.e., olaparib, everolimus, and sunitinib), and immunotherapies (e.g., nivolumab and pembrolizumab). Furthermore, PRRT shows promising first results as a treatment prior to surgery. There is great demand to enhance the efficacy of PRRT through combination with other anticancer treatments. While research in this area is currently limited, the field is rapidly evolving with numerous ongoing clinical trials aiming to address this need and explore novel therapeutic combinations.
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Affiliation(s)
- Denise S Hoogenkamp
- Department of Nuclear Medicine, Netherlands Cancer Institute, Amsterdam, The Netherlands
- ENETS Center of Excellence NKI-AVL, The Netherlands Cancer Institute/UMC Utrecht, Amsterdam, The Netherlands
| | - Linda J de Wit-van der Veen
- Department of Nuclear Medicine, Netherlands Cancer Institute, Amsterdam, The Netherlands
- ENETS Center of Excellence NKI-AVL, The Netherlands Cancer Institute/UMC Utrecht, Amsterdam, The Netherlands
| | - Daphne M V Huizing
- Department of Nuclear Medicine, Netherlands Cancer Institute, Amsterdam, The Netherlands
- ENETS Center of Excellence NKI-AVL, The Netherlands Cancer Institute/UMC Utrecht, Amsterdam, The Netherlands
| | - Margot E T Tesselaar
- ENETS Center of Excellence NKI-AVL, The Netherlands Cancer Institute/UMC Utrecht, Amsterdam, The Netherlands
- Department of Gastrointestinal Oncology, Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Rachel S van Leeuwaarde
- ENETS Center of Excellence NKI-AVL, The Netherlands Cancer Institute/UMC Utrecht, Amsterdam, The Netherlands
- Department of Endocrinology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Marcel P M Stokkel
- Department of Nuclear Medicine, Netherlands Cancer Institute, Amsterdam, The Netherlands
- ENETS Center of Excellence NKI-AVL, The Netherlands Cancer Institute/UMC Utrecht, Amsterdam, The Netherlands
| | - Marnix G E H Lam
- ENETS Center of Excellence NKI-AVL, The Netherlands Cancer Institute/UMC Utrecht, Amsterdam, The Netherlands
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, 3584 CX, Utrecht, The Netherlands
| | - Arthur J A T Braat
- Department of Nuclear Medicine, Netherlands Cancer Institute, Amsterdam, The Netherlands.
- ENETS Center of Excellence NKI-AVL, The Netherlands Cancer Institute/UMC Utrecht, Amsterdam, The Netherlands.
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, 3584 CX, Utrecht, The Netherlands.
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Soulen MC, Teitelbaum UR, Mick R, Eads J, Mondschein JI, Dagli M, van Houten D, Damjanov N, Schneider C, Cengel K, Metz DC. Integrated Capecitabine-Temozolomide with Radioembolization for Liver-Dominant G2 NETs: Long-Term Outcomes of a Single-Institution Retrospective Study. Cardiovasc Intervent Radiol 2024; 47:60-68. [PMID: 38057498 DOI: 10.1007/s00270-023-03614-8] [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: 08/04/2023] [Accepted: 10/31/2023] [Indexed: 12/08/2023]
Abstract
PURPOSE Capecitabine-Temozolomide (CapTem) is an oral chemotherapy regimen for NETs. Both drugs are radiosensitizers. Integrating CapTem and Y90 transarterial radioembolization (TARE) in patients with grade 2 neuroendocrine tumor (NET) liver metastases achieved an encouraging objective response rate (ORR) and progression-free survival (PFS) in a feasibility study. This study expands that report to a larger cohort with longer follow-up. METHODS Therapy consisted of monthly cycles of capecitabine 600 mg/m2 twice daily for 14 days and temozolomide 150-200 mg/m2 on day 10-14. Simulation angiography was performed during the initial cycle. The dominant lobe was treated with 90Y-resin microspheres using BSA dosimetry on day 7 of the second cycle of CapTem. Patients with bilobar disease had the other lobe treated on day 7 of the third or fourth cycle. CapTem was continued until progression or intolerance. Clinical and laboratory assessment was done monthly and imaging every 3 months. RESULTS 35/37 patients completed the prescribed regimen. Primary sites of disease were pancreas (16), lung (10), gut (7) and unknown (4). Mean duration of CapTem was 12 months (range, 4-32 months). ORR in the liver was 72% with a disease control rate of 100%. Median PFS was 36 months (95% CI, 25-45 months). Median overall survival was 41 months (95% CI, 24-87 months) from initiation of CapTemY90 therapy and 130 months (95% CI, 56-172 months) from initial diagnosis. CONCLUSION Chemoradiation with CapTem and TARE provided durable control of G2 NET liver metastases for substantially longer than expectations for embolotherapy or chemotherapy alone.
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Affiliation(s)
- Michael C Soulen
- Neuroendocrine Tumor Program, Division of Interventional Oncology, Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA.
- Neuroendocrine Tumor Program, Department of Radiology, Abramson Cancer Center, University of Pennsylvania, 1 Silverstein, 3400 Spruce Street, Philadelphia, PA, 19104, USA.
| | - Ursina R Teitelbaum
- Neuroendocrine Tumor Program, Division of Medical Oncology, Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
| | - Rosemarie Mick
- Department of Biostatistics, Epidemiology and Informatics, Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
| | - Jennifer Eads
- Neuroendocrine Tumor Program, Division of Medical Oncology, Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
| | - Jeffrey I Mondschein
- Neuroendocrine Tumor Program, Division of Interventional Oncology, Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
| | - Mandeep Dagli
- Neuroendocrine Tumor Program, Division of Interventional Oncology, Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
| | - Diana van Houten
- Neuroendocrine Tumor Program, Division of Interventional Oncology, Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
| | - Nevena Damjanov
- Neuroendocrine Tumor Program, Division of Medical Oncology, Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
| | - Charles Schneider
- Neuroendocrine Tumor Program, Division of Medical Oncology, Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
| | - Keith Cengel
- Neuroendocrine Tumor Program, Division of Radiation Oncology, Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
| | - David C Metz
- Neuroendocrine Tumor Program, Division of Gastroenterology, Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, USA
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Braat MNGJA, Ebbers SC, Alsultan AA, Neek AO, Bruijnen RCG, Smits MLJ, de Bruijne J, Lam MGEH, Braat AJAT. Prophylactic Medication during Radioembolization in Metastatic Liver Disease: Is It Really Necessary? A Retrospective Cohort Study and Systematic Review of the Literature. Diagnostics (Basel) 2023; 13:3652. [PMID: 38132236 PMCID: PMC10742749 DOI: 10.3390/diagnostics13243652] [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: 10/26/2023] [Revised: 12/09/2023] [Accepted: 12/10/2023] [Indexed: 12/23/2023] Open
Abstract
PURPOSE Trans-arterial radioembolization is a well-studied tumoricidal treatment for liver malignancies; however, consensus and evidence regarding periprocedural prophylactic medication (PPM) are lacking. METHODS A single-center retrospective analysis from 2014 to 2020 was performed in patients treated with 90Y-glass microspheres for neuroendocrine or colorectal liver metastases. Inclusion criteria were the availability of at least 3 months of clinical, biochemical, and imaging follow-up and post-treatment 90Y-PET/CT imaging for the determination of the whole non-tumorous liver absorbed dose (Dh). Logistic regression models were used to investigate if variables (among which are P/UDCA and Dh) were associated with either clinical toxicity, biochemical toxicity, or hepatotoxicity. Additionally, a structured literature search was performed in November 2022 to identify all publications related to PPM use in radioembolization treatments. RESULTS Fifty-one patients received P/UDCA as post-treatment medication, while 19 did not. No correlation was found between toxicity and P/UDCA use. Dh was associated with biochemical toxicity (p = 0.05). A literature review resulted in eight relevant articles, including a total of 534 patients, in which no consistent advice regarding PPM was provided. CONCLUSION In this single-center, retrospective review, P/UDCA use did not reduce liver toxicity in patients with metastatic liver disease. The whole non-tumorous liver-absorbed dose was the only significant factor for hepatotoxicity. No standardized international guidelines or supporting evidence exist for PPM in radioembolization.
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Affiliation(s)
- Manon N. G. J. A. Braat
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, 3508 GA Utrecht, The Netherlands (M.G.E.H.L.); (A.J.A.T.B.)
| | - Sander C. Ebbers
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, 3508 GA Utrecht, The Netherlands (M.G.E.H.L.); (A.J.A.T.B.)
| | - Ahmed A. Alsultan
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, 3508 GA Utrecht, The Netherlands (M.G.E.H.L.); (A.J.A.T.B.)
| | - Atal O. Neek
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, 3508 GA Utrecht, The Netherlands (M.G.E.H.L.); (A.J.A.T.B.)
| | - Rutger C. G. Bruijnen
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, 3508 GA Utrecht, The Netherlands (M.G.E.H.L.); (A.J.A.T.B.)
| | - Maarten L. J. Smits
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, 3508 GA Utrecht, The Netherlands (M.G.E.H.L.); (A.J.A.T.B.)
| | - Joep de Bruijne
- Department of Gastroenterology and Hepatology, University Medical Center Utrecht, 3508 GA Utrecht, The Netherlands
| | - Marnix G. E. H. Lam
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, 3508 GA Utrecht, The Netherlands (M.G.E.H.L.); (A.J.A.T.B.)
| | - Arthur J. A. T. Braat
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, 3508 GA Utrecht, The Netherlands (M.G.E.H.L.); (A.J.A.T.B.)
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Gustafsson J, Taprogge J. Future trends for patient-specific dosimetry methodology in molecular radiotherapy. Phys Med 2023; 115:103165. [PMID: 37880071 DOI: 10.1016/j.ejmp.2023.103165] [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: 05/31/2023] [Revised: 10/03/2023] [Accepted: 10/17/2023] [Indexed: 10/27/2023] Open
Abstract
Molecular radiotherapy is rapidly expanding, and new radiotherapeutics are emerging. The majority of treatments is still performed using empirical fixed activities and not tailored for individual patients. Molecular radiotherapy dosimetry is often seen as a promising candidate that would allow personalisation of treatments as outcome should ultimately depend on the absorbed doses delivered and not the activities administered. The field of molecular radiotherapy dosimetry has made considerable progress towards the feasibility of routine clinical dosimetry with reasonably accurate absorbed-dose estimates for a range of molecular radiotherapy dosimetry applications. A range of challenges remain with respect to the accurate quantification, assessment of time-integrated activity and absorbed dose estimation. In this review, we summarise a range of technological and methodological advancements, mainly focussed on beta-emitting molecular radiotherapeutics, that aim to improve molecular radiotherapy dosimetry to achieve accurate, reproducible, and streamlined dosimetry. We describe how these new technologies can potentially improve the often time-consuming considered process of dosimetry and provide suggestions as to what further developments might be required.
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Affiliation(s)
| | - Jan Taprogge
- National Radiotherapy Trials Quality Assurance (RTTQA) Group, Joint Department of Physics, Royal Marsden NHSFT, Downs Road, Sutton SM2 5PT, United Kingdom; The Institute of Cancer Research, 123 Old Brompton Road, London SW7 3RP, United Kingdom
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8
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Clift AK, Thomas R, Frilling A. Developments in interventional management of hepatic metastases from neuroendocrine tumours. Best Pract Res Clin Endocrinol Metab 2023; 37:101798. [PMID: 37468404 DOI: 10.1016/j.beem.2023.101798] [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] [Indexed: 07/21/2023]
Abstract
Neuroendocrine tumours commonly metastasise to the liver, particularly those arising from the intestinal tract and pancreas. Whilst surgery offers the only approach with intent to cure, the vast majority of patients with neuroendocrine liver metastases are ineligible. Liver-directed interventional therapies seek to exploit the patho-anatomy of the blood supply of hepatic metastases to deliver therapy to liver deposits. This may involve percutaneous ablation, bland embolization, or the selective infusion of chemotherapeutics, targeted agents or radiolabelled embolic material. Retrospective case series evidence has characterised objective response rates, disease control rates, and longer-term outcomes associated with each approach. Recent advances in this field include ongoing comparative trials of different techniques, but more importantly, combinations of interventional liver-directed therapies and other systemic therapy in multimodal treatment concepts.
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Affiliation(s)
- Ashley Kieran Clift
- Cancer Research UK Oxford Centre, University of Oxford, Oxford, United Kingdom; Department of Surgery & Cancer, Imperial College London, London, United Kingdom.
| | - Robert Thomas
- Department of Imaging, Imperial College Healthcare NHS Trust, London, United Kingdom.
| | - Andrea Frilling
- Department of Surgery & Cancer, Imperial College London, London, United Kingdom.
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9
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Stella M, van Rooij R, Lam MGEH, de Jong HWAM, Braat AJAT. Automatic healthy liver segmentation for holmium-166 radioembolization dosimetry. EJNMMI Res 2023; 13:68. [PMID: 37453996 DOI: 10.1186/s13550-023-00996-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Accepted: 05/08/2023] [Indexed: 07/18/2023] Open
Abstract
BACKGROUND For safe and effective holmium-166 (166Ho) liver radioembolization, dosimetry is crucial and requires accurate healthy liver definition. The current clinical standard relies on manual segmentation and registration of a separately acquired contrast enhanced CT (CECT), a prone-to-error and time-consuming task. An alternative is offered by simultaneous imaging of 166Ho and technetium-99m stannous-phytate accumulating in healthy liver cells (166Ho-99mTc dual-isotope protocol). This study compares healthy liver segmentation performed with an automatic method using 99mTc images derived from a 166Ho-99mTc dual-isotope acquisition to the manual segmentation, focusing on healthy liver dosimetry and corresponding hepatotoxicity. Data from the prospective HEPAR PLuS study were used. Automatic healthy liver segmentation was obtained by thresholding the 99mTc image (no registration step required). Manual segmentation was performed on CECT and then manually registered to the SPECT/CT and subsequently to the corresponding 166Ho SPECT to compute absorbed dose in healthy liver. RESULTS Thirty-one patients (66 procedures) were assessed. Manual segmentation and registration took a median of 30 min per patient, while automatic segmentation was instantaneous. Mean ± standard deviation of healthy liver absorbed dose was 18 ± 7 Gy and 20 ± 8 Gy for manual and automatic segmentations, respectively. Mean difference ± coefficient of reproducibility between healthy liver absorbed doses using the automatic versus manual segmentation was 2 ± 6 Gy. No correlation was found between mean absorbed dose in the healthy liver and hepatotoxicity. CONCLUSIONS 166Ho-99mTc dual-isotope protocol can automatically segment the healthy liver without hampering the 166Ho dosimetry assessment. TRIAL REGISTRATION ClinicalTrials.gov, NCT02067988. Registered 20 February 2014. https://clinicaltrials.gov/ct2/show/NCT02067988.
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Affiliation(s)
- Martina Stella
- Department of Radiology and Nuclear Medicine, UMC Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands.
| | - Rob van Rooij
- Department of Radiology and Nuclear Medicine, UMC Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
| | - Marnix G E H Lam
- Department of Radiology and Nuclear Medicine, UMC Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
| | - Hugo W A M de Jong
- Department of Radiology and Nuclear Medicine, UMC Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
| | - Arthur J A T Braat
- Department of Radiology and Nuclear Medicine, UMC Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
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Lewandowski RJ, Toskich BB, Brown DB, El-Haddad G, Padia SA. Role of Radioembolization in Metastatic Neuroendocrine Tumors. Cardiovasc Intervent Radiol 2022; 45:1590-1598. [PMID: 35918431 DOI: 10.1007/s00270-022-03206-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 06/14/2022] [Indexed: 11/24/2022]
Abstract
The liver is the most common site of metastasis for neuroendocrine tumors originating from the gastrointestinal tract. Neuroendocrine liver metastases (NELMs) portend a worsening clinical course, making local management important. Local treatment options include surgery, thermal ablation, and trans-catheter intra-arterial therapies, such as radioembolization. Radioembolization is generally preferred over other embolotherapies in patients with colonized biliary systems. Current best practice involves personalized treatment planning, optimizing tumor radiation absorbed dose and minimizing radiation to the normal hepatic parenchyma. As part of a multidisciplinary approach, radioembolization is a versatile embolotherapy offering neoadjuvant, palliative, and ablative treatment options for patients with NELMs.
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Affiliation(s)
| | | | - Daniel B Brown
- Division of Interventional Radiology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Ghassan El-Haddad
- Diagnostic Imaging and Interventional Radiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
| | - Siddharth A Padia
- Division of Interventional Radiology, David Geffen School of Medicine at University of California, Los Angeles, CA, USA
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The Evolving Role of Radioembolization in the Treatment of Neuroendocrine Liver Metastases. Cancers (Basel) 2022; 14:cancers14143415. [PMID: 35884479 PMCID: PMC9322914 DOI: 10.3390/cancers14143415] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 07/10/2022] [Accepted: 07/12/2022] [Indexed: 02/01/2023] Open
Abstract
Simple Summary This review provides basic insights into radioembolization, also known as selective internal radiation therapy, in patients suffering from neuroendocrine liver metastases. Radioembolization is a treatment that uses radioactive beads that are implanted intra-arterially to locally irradiate liver tumors. The available literature on radioembolization in neuroendocrine liver metastases show promising results in terms of efficacy and toxicity and will be discussed in more detail. However, data in the field of NELM need clarification, and this review also discusses the caveats, challenges and new insights when considering radioembolization in neuroendocrine liver metastases. Abstract At diagnosis, 21–50% of neuroendocrine tumors already have distant metastases, of which the liver is most commonly affected. Unfortunately, the presence of neuroendocrine liver metastases (NELM) is the most incriminating factor for survival. At NELM diagnosis, 60–70% of patients suffer from bilobar multifocal disease, making them ineligible for surgical resection. With limited systemic options, a clinical need for liver-directed treatments exists. Trans-arterial (bland) embolization, chemoembolization and radioembolization have been increasingly used in the treatment of NELM. In recent years, radioembolization (also known as selective internal radiation therapy) has gained attention due to promising tumor reductive results, limited toxicities and increasing scientific evidence. This review provides basic insights into radioembolization as a technique, a summary of available literature on radioembolization in NELM, and discusses caveats, challenges and new insights when considering radioembolization in NELM.
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