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Usmani N, Deyell RJ, Portwine C, Rafael MS, Moorehead PC, Shammas A, Vali R, Farfan M, Vanniyasingam T, Morgenstern DA, Irwin MS. Residual meta-iodobenzyl guanidine (MIBG) positivity following therapy for metastatic neuroblastoma: Patient characteristics, imaging, and outcome. Pediatr Blood Cancer 2021; 68:e29289. [PMID: 34411405 DOI: 10.1002/pbc.29289] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 07/18/2021] [Accepted: 07/26/2021] [Indexed: 02/04/2023]
Abstract
BACKGROUND Meta-iodobenzylguanidine(MIBG) scans are used to detect neuroblastoma metastatic lesions at diagnosis and during posttreatment surveillance. MIBG positivity following induction chemotherapy correlates with poor outcome; however, there are reports of patients with progression-free survival despite MIBG positivity at the end of therapy. The factors distinguishing these survivors from patients who progress or relapse are unclear. FDG-positron-emission tomography (PET) scans can also detect metastatic lesions at diagnosis; however, their role in posttherapy surveillance is less well studied. METHODS We performed a retrospective analysis of International Neuroblastoma Staging System (INSS) stage 4 patients to identify those with residual MIBG-avid metastatic lesions on end-of-therapy scans without prior progression. Data collected included age, disease sites, histopathology, biomarkers, treatment, imaging studies, and response. RESULTS Eleven of 265 patients met inclusion criteria. At diagnosis three of 11 patients were classified as intermediate and eight of 11 high risk; nine of 11 had documented marrow involvement. Histologic classification was favorable for four of 10 and MYCN amplification was detected in zero of 11 cases. The median time with persistent MIBG positivity following treatment was 1.5 years. Seven patients had at least one PET scan with low or background activity. Biopsies of three of three MIBG-avid residual lesions showed differentiation. All patients remain alive with no disease progression at a median of 4.0 years since end of therapy. CONCLUSION Persistently MIBG-avid metastatic lesions in subsets of patients following completion of therapy may not represent active disease that will progress. Further studies are needed to determine whether MYCN status or other biomarkers, and/or PET scans, may help identify patients with residual inactive MIBG lesions who require no further therapy.
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Affiliation(s)
- Nida Usmani
- Department of Pediatrics, Division of Hematology and Oncology, McMaster Children's Hospital, Hamilton, Ontario, Canada
| | - Rebecca J Deyell
- Department of Pediatrics, Division of Hematology/Oncology/BMT, BC Children's Hospital, University of British Columbia, Vancouver, British Columbia, Canada
| | - Carol Portwine
- Department of Pediatrics, Division of Hematology and Oncology, McMaster Children's Hospital, Hamilton, Ontario, Canada
| | - Margarida Simao Rafael
- Department of Pediatrics, Division of Hematology and Oncology, Janeway Children's Health and Rehabilitation Centre, and Memorial University, St. John's, Newfoundland and Labrador, Canada
| | - Paul C Moorehead
- Department of Pediatrics, Division of Hematology and Oncology, Janeway Children's Health and Rehabilitation Centre, and Memorial University, St. John's, Newfoundland and Labrador, Canada
| | - Amer Shammas
- Department of Diagnostic Imaging, The Hospital for Sick Children and University of Toronto, Toronto, Ontario, Canada
| | - Reza Vali
- Department of Diagnostic Imaging, The Hospital for Sick Children and University of Toronto, Toronto, Ontario, Canada
| | - Mateo Farfan
- Department of Pediatrics, Division of Hematology/Oncology/BMT, BC Children's Hospital, University of British Columbia, Vancouver, British Columbia, Canada
| | | | - Daniel A Morgenstern
- Department of Pediatrics, Division of Hematology & Oncology, The Hospital for Sick Children and University of Toronto, Toronto, Ontario, Canada
| | - Meredith S Irwin
- Department of Pediatrics, Division of Hematology & Oncology, The Hospital for Sick Children and University of Toronto, Toronto, Ontario, Canada
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Excellent prognosis of patients with intermediate-risk neuroblastoma and residual tumor postchemotherapy. J Pediatr Surg 2018; 53:1761-1765. [PMID: 29195808 DOI: 10.1016/j.jpedsurg.2017.10.061] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 10/27/2017] [Accepted: 10/28/2017] [Indexed: 11/24/2022]
Abstract
BACKGROUND/PURPOSE The prognosis of patients with intermediate-risk neuroblastoma is favorable; therefore, a reduction therapy is desired. However, the long-term prognosis of those with residual tumor is unclear. The aim of this study was to clarify the necessity of residual tumor resection. METHODS We retrospectively reviewed the records of patients diagnosed with intermediate-risk neuroblastoma who either were treated by chemotherapy only (nonresection group; n=16), or received postchemotherapy tumor resection (resection group; n=9). RESULTS In the nonresection group, tumor size decreased in 14 patients; 5 had no detectable local tumor at the end of the follow-up period. Tumor size increased in 2 patients 1.5-2.5years postchemotherapy. Both patients received additional treatment and survived. All patients survived during the median follow-up time of 127months. In the resection group, 5 patients received complete resections and 4 patients received nearly complete resections. All patients survived during the median follow-up time of 84months. In 8 out of 9 resected tumors, regression or maturation was pathologically induced by chemotherapy-only treatment. CONCLUSION Patients with intermediate-risk neuroblastoma with or without postchemotherapy residual tumor resection had an excellent long-term outcome. The tumor pathology with intermediate-risk neuroblastoma might be susceptible to change to regression or maturation by chemotherapy. LEVEL OF EVIDENCE IV.
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Iehara T, Yagyu S, Tsuchiya K, Kuwahara Y, Miyachi M, Tajiri T, Sugimoto T, Sawada T, Hosoi H. Residual tumor in cases of intermediate-risk neuroblastoma did not influence the prognosis. Jpn J Clin Oncol 2016; 46:661-6. [DOI: 10.1093/jjco/hyw050] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2015] [Accepted: 03/27/2016] [Indexed: 11/13/2022] Open
Affiliation(s)
- Tomoko Iehara
- Department of Pediatrics, Kyoto Prefectural University of Medicine, Graduate School of Medical Science Kawaramachi-Hirokoji Kamigyo-ku, Kyoto
| | - Shigeki Yagyu
- Department of Pediatrics, Kyoto Prefectural University of Medicine, Graduate School of Medical Science Kawaramachi-Hirokoji Kamigyo-ku, Kyoto
| | - Kunihiko Tsuchiya
- Department of Pediatrics, Kyoto Prefectural University of Medicine, Graduate School of Medical Science Kawaramachi-Hirokoji Kamigyo-ku, Kyoto
| | - Yasumichi Kuwahara
- Department of Pediatrics, Kyoto Prefectural University of Medicine, Graduate School of Medical Science Kawaramachi-Hirokoji Kamigyo-ku, Kyoto
| | - Mitsuru Miyachi
- Department of Pediatrics, Kyoto Prefectural University of Medicine, Graduate School of Medical Science Kawaramachi-Hirokoji Kamigyo-ku, Kyoto
| | - Tatsuro Tajiri
- Department of Pediatric Surgery, Kyoto Prefectural University of Medicine, Graduate School of Medical Science Kawaramachi-Hirokoji Kamigyo-ku, Kyoto, Japan
| | - Tohru Sugimoto
- Department of Pediatrics, Kyoto Prefectural University of Medicine, Graduate School of Medical Science Kawaramachi-Hirokoji Kamigyo-ku, Kyoto
| | - Tadashi Sawada
- Department of Pediatrics, Kyoto Prefectural University of Medicine, Graduate School of Medical Science Kawaramachi-Hirokoji Kamigyo-ku, Kyoto
| | - Hajime Hosoi
- Department of Pediatrics, Kyoto Prefectural University of Medicine, Graduate School of Medical Science Kawaramachi-Hirokoji Kamigyo-ku, Kyoto
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Rumore MM. Medication Repurposing in Pediatric Patients: Teaching Old Drugs New Tricks. J Pediatr Pharmacol Ther 2016; 21:36-53. [PMID: 26997928 PMCID: PMC4778695 DOI: 10.5863/1551-6776-21.1.36] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
OBJECTIVES Gaps in pediatric therapeutics often result in off-label use and specifically, novel uses for existing medications, termed "drug repurposing." Drug Information (DI) queries to a Pediatric Medication Resource Center of a large metropolitan pediatric hospital in New York and inherent difficulties in retrieving evidence-based information prompted a review of current medication repurposing for pediatric patients. The objective included characterization of innovative off-label use of medications Food and Drug Administration (FDA)-approved for 1 or more indications to treat a totally different disorder or indication in pediatric patients. METHODS A systematic literature review was conducted to retrieve publications describing repurposed medications in pediatric patients. Excluded was FDA-approved indications used off-label in pediatric patients (e.g., different dose), preclinical data, adult use only, and experimental use. Evidence quality was classified using a modified American Academy of Neurology Level of Evidence. Results were analyzed using χ(2) at p < 0.05. RESULTS Over 2000 references were retrieved and reviewed. A total of 101 medications repurposed for novel off-label uses for pediatric patients were identified: 38 for neonates, 74 for children, and 52 for adolescents. Neonates and infants were least likely to receive a medication for a repurposed use. Strong or intermediate evidence existed in 80.2% of cases. The evidence was weak in 19.8%. No significant relationship was observed between the pediatric age group and strength of the literature. Most repurposed uses pertained to generic or widely used medications. Less than 5% of medications were first marketed after 2011. CONCLUSIONS While not exhaustive, the present study represents the most comprehensive listing of novel uses exclusive to pediatric patients. Further research is needed to identify the frequency of repurposed uses. The valuable DI role of pharmacists in assessing repurposed uses is of expanding and increasing importance to ensure such uses are evidence-based.
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Affiliation(s)
- Martha M. Rumore
- Department of Social, Behavioral and Administrative Sciences, Touro College of Pharmacy, New York, New York; Of Counsel, Sorell, Lenna, & Schmidt, LLP, Hauppauge, New York
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Abstract
Neuroblastoma (NB) is the third most common pediatric cancer. Although NB accounts for 7% of pediatric malignancies, it is responsible for more than 10% of childhood cancer-related mortality. Prognosis and treatment are determined by clinical and biological risk factors. Estimated 5-year survival rates for patients with non-high-risk and high-risk NB are more than 90% and less than 50%, respectively. Recent clinical trials have continued to reduce therapy for patients with non-high-risk NB, including the most favorable subsets who are often followed with observation approaches. In contrast, high-risk patients are treated aggressively with chemotherapy, radiation, surgery, and myeloablative and immunotherapies.
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