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医療専門家向け Childhood Chordoma Treatment (PDQ®)

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This PDQ cancer information summary for health professionals provides comprehensive, peer-reviewed, evidence-based information about the treatment of pediatric chordoma. It is intended as a resource to inform and assist clinicians who care for cancer patients. It does not provide formal guidelines or recommendations for making health care decisions.

This summary is reviewed regularly and updated as necessary by the PDQ Pediatric Treatment Editorial Board, which is editorially independent of the National Cancer Institute (NCI). The summary reflects an independent review of the literature and does not represent a policy statement of NCI or the National Institutes of Health (NIH).

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Incidence

Chordoma is a very rare tumor of bone that arises from remnants of the notochord within the clivus, spinal vertebrae, or sacrum; the most common site in children is the cranium.[ 1 ] The incidence in the United States is approximately one case per 1 million people per year, and only 5% of all chordomas occur in patients younger than 20 years.[ 2 ][ 3 ] Most pediatric patients have the classical or chondroid variant of chordoma, while the dedifferentiated variant is rare in children.[ 2 ][ 4 ]

参考文献
  1. Sebro R, DeLaney T, Hornicek F, et al.: Differences in sex distribution, anatomic location and MR imaging appearance of pediatric compared to adult chordomas. BMC Med Imaging 16 (1): 53, 2016.[PUBMED Abstract]
  2. Hoch BL, Nielsen GP, Liebsch NJ, et al.: Base of skull chordomas in children and adolescents: a clinicopathologic study of 73 cases. Am J Surg Pathol 30 (7): 811-8, 2006.[PUBMED Abstract]
  3. Lau CS, Mahendraraj K, Ward A, et al.: Pediatric Chordomas: A Population-Based Clinical Outcome Study Involving 86 Patients from the Surveillance, Epidemiology, and End Result (SEER) Database (1973-2011). Pediatr Neurosurg 51 (3): 127-36, 2016.[PUBMED Abstract]
  4. McMaster ML, Goldstein AM, Bromley CM, et al.: Chordoma: incidence and survival patterns in the United States, 1973-1995. Cancer Causes Control 12 (1): 1-11, 2001.[PUBMED Abstract]
Prognosis

Younger children appear to have a worse outlook than do older patients.[ 1 ][ 2 ][ 3 ][ 4 ][ 5 ][ 6 ] The survival rate in children and adolescents ranges from about 50% to 80% for cranial chordomas.[ 2 ][ 3 ][ 5 ] A retrospective literature review and review of institutional patients identified 682 patients with chordomas of the spine, with a median age of 57 years.[ 7 ][Level of evidence: 3iiiA] Age younger than 18 years, location in sacral spine, dedifferentiated pathology, and chemotherapy were associated with a lower probability for progression-free survival (PFS). Young age (<18 years), old age (>65 years), bladder or bowel dysfunction at presentation, dedifferentiated pathology, recurrence or progression, and metastases were associated with a worse overall survival. Histopathology is also an important prognostic factor, with atypical or chondroid pathology having worse outcomes than classical pathology.[ 8 ][Level of evidence: 3iiiA]

A multicenter, retrospective study identified 40 children with chordomas (median age, 12 years).[ 9 ][Level of evidence: 3iiiA] Most of the patients had the histologically classical form of chordoma (45.5%), and the chordomas were mostly located at the skull base (72.5%). The overall survival (OS) rates were 66.6% at 5 years and 58.6% at 10 years. The PFS rates were 55.7% at 5 years and 52% at 10 years. Total resection correlated with a better outcome (P = .04 for OS and PFS, log-rank). Loss of BAF47 immunoexpression appeared to be a significant independent adverse prognostic factor (PFS, P = .033).

A retrospective analysis identified seven children with poorly differentiated chordomas.[ 10 ][Level of evidence: 3iiA] The median survival of these patients was 9 months. All poorly differentiated chordomas showed loss of SMARCB1 expression by immunohistochemistry. Copy number profiles were derived from intensity measures of the methylation probes and indicated 22q losses affecting the SMARCB1 region in all poorly differentiated chordomas.

参考文献
  1. Coffin CM, Swanson PE, Wick MR, et al.: Chordoma in childhood and adolescence. A clinicopathologic analysis of 12 cases. Arch Pathol Lab Med 117 (9): 927-33, 1993.[PUBMED Abstract]
  2. Borba LA, Al-Mefty O, Mrak RE, et al.: Cranial chordomas in children and adolescents. J Neurosurg 84 (4): 584-91, 1996.[PUBMED Abstract]
  3. Hoch BL, Nielsen GP, Liebsch NJ, et al.: Base of skull chordomas in children and adolescents: a clinicopathologic study of 73 cases. Am J Surg Pathol 30 (7): 811-8, 2006.[PUBMED Abstract]
  4. Jian BJ, Bloch OG, Yang I, et al.: A comprehensive analysis of intracranial chordoma and survival: a systematic review. Br J Neurosurg 25 (4): 446-53, 2011.[PUBMED Abstract]
  5. Yasuda M, Bresson D, Chibbaro S, et al.: Chordomas of the skull base and cervical spine: clinical outcomes associated with a multimodal surgical resection combined with proton-beam radiation in 40 patients. Neurosurg Rev 35 (2): 171-82; discussion 182-3, 2012.[PUBMED Abstract]
  6. Chambers KJ, Lin DT, Meier J, et al.: Incidence and survival patterns of cranial chordoma in the United States. Laryngoscope 124 (5): 1097-102, 2014.[PUBMED Abstract]
  7. Zhou J, Sun J, Bai HX, et al.: Prognostic Factors in Patients With Spinal Chordoma: An Integrative Analysis of 682 Patients. Neurosurgery 81 (5): 812-823, 2017.[PUBMED Abstract]
  8. Tsitouras V, Wang S, Dirks P, et al.: Management and outcome of chordomas in the pediatric population: The Hospital for Sick Children experience and review of the literature. J Clin Neurosci 34: 169-176, 2016.[PUBMED Abstract]
  9. Beccaria K, Tauziède-Espariat A, Monnien F, et al.: Pediatric Chordomas: Results of a Multicentric Study of 40 Children and Proposal for a Histopathological Prognostic Grading System and New Therapeutic Strategies. J Neuropathol Exp Neurol 77 (3): 207-215, 2018.[PUBMED Abstract]
  10. Hasselblatt M, Thomas C, Hovestadt V, et al.: Poorly differentiated chordoma with SMARCB1/INI1 loss: a distinct molecular entity with dismal prognosis. Acta Neuropathol 132 (1): 149-51, 2016.[PUBMED Abstract]
Clinical Presentation

Patients usually present with pain, with or without neurologic deficits such as cranial or other nerve impairment. Diagnosis is straightforward when the typical physaliferous (soap bubble–bearing) cells are present. Differential diagnosis is sometimes difficult and includes dedifferentiated chordoma and chondrosarcoma. Childhood chordoma has been associated with tuberous sclerosis complex.[ 1 ]

参考文献
  1. McMaster ML, Goldstein AM, Parry DM: Clinical features distinguish childhood chordoma associated with tuberous sclerosis complex (TSC) from chordoma in the general paediatric population. J Med Genet 48 (7): 444-9, 2011.[PUBMED Abstract]
Treatment of Childhood Chordoma

Treatment options for childhood chordoma include the following:

  1. Surgery.
  2. Radiation therapy.

Standard treatment includes surgery and external radiation therapy, often proton-beam radiation.[ 1 ][ 2 ] Surgery is not commonly curative in children and adolescents because of difficulty obtaining clear margins and the likelihood of the chordoma arising in the skull base, rather than in the sacrum, making them relatively inaccessible to complete surgical excision. However, if gross-total resection can be achieved, outcome is improved.[ 3 ][Level of evidence: 3iiA]

The best results have been obtained using proton-beam therapy (charged-particle radiation therapy) because these tumors are relatively radiation resistant, and radiation-dose conformality with protons allows for higher tumor doses while sparing adjacent critical normal tissues.[ 4 ][ 5 ]; [ 1 ][ 6 ][Level of evidence: 3iiA]; [ 7 ][Level of evidence: 3iiiDiii]

There are only a few anecdotal reports of the use of cytotoxic chemotherapy after surgery alone or surgery plus radiation therapy. Treatment with ifosfamide/etoposide and vincristine/doxorubicin/cyclophosphamide has been reported with some success.[ 8 ][ 9 ] The role for chemotherapy in the treatment of this disease is uncertain.

Imatinib mesylate has been studied in adults with chordoma on the basis of the overexpression of PDGFR alpha, beta, and KIT in this disease.[ 10 ][ 11 ] Among 50 adults with chordoma treated with imatinib and evaluable by Response Evaluation Criteria In Solid Tumors (RECIST) guidelines, there was one partial response and 28 additional patients had stable disease at 6 months.[ 11 ] The low rate of RECIST responses and the potentially slow natural course of the disease complicate the assessment of the efficacy of imatinib for chordoma.[ 11 ] Other tyrosine kinase inhibitors and combinations involving kinase inhibitors have been studied in adults.[ 12 ][ 13 ][ 14 ] One multicenter French retrospective study reported five patients who had partial responses to treatment with either imatinib, sorafenib, or erlotinib, with a median progression-free survival of 36 months.[ 15 ]

Recurrences are usually local but can include distant metastases to lungs or bone.

参考文献
  1. Yasuda M, Bresson D, Chibbaro S, et al.: Chordomas of the skull base and cervical spine: clinical outcomes associated with a multimodal surgical resection combined with proton-beam radiation in 40 patients. Neurosurg Rev 35 (2): 171-82; discussion 182-3, 2012.[PUBMED Abstract]
  2. DeLaney TF, Liebsch NJ, Pedlow FX, et al.: Long-term results of Phase II study of high dose photon/proton radiotherapy in the management of spine chordomas, chondrosarcomas, and other sarcomas. J Surg Oncol 110 (2): 115-22, 2014.[PUBMED Abstract]
  3. Rassi MS, Hulou MM, Almefty K, et al.: Pediatric Clival Chordoma: A Curable Disease that Conforms to Collins' Law. Neurosurgery 82 (5): 652-660, 2018.[PUBMED Abstract]
  4. Hug EB, Sweeney RA, Nurre PM, et al.: Proton radiotherapy in management of pediatric base of skull tumors. Int J Radiat Oncol Biol Phys 52 (4): 1017-24, 2002.[PUBMED Abstract]
  5. Noël G, Habrand JL, Jauffret E, et al.: Radiation therapy for chordoma and chondrosarcoma of the skull base and the cervical spine. Prognostic factors and patterns of failure. Strahlenther Onkol 179 (4): 241-8, 2003.[PUBMED Abstract]
  6. Rombi B, Ares C, Hug EB, et al.: Spot-scanning proton radiation therapy for pediatric chordoma and chondrosarcoma: clinical outcome of 26 patients treated at paul scherrer institute. Int J Radiat Oncol Biol Phys 86 (3): 578-84, 2013.[PUBMED Abstract]
  7. Rutz HP, Weber DC, Goitein G, et al.: Postoperative spot-scanning proton radiation therapy for chordoma and chondrosarcoma in children and adolescents: initial experience at paul scherrer institute. Int J Radiat Oncol Biol Phys 71 (1): 220-5, 2008.[PUBMED Abstract]
  8. Dhall G, Traverso M, Finlay JL, et al.: The role of chemotherapy in pediatric clival chordomas. J Neurooncol 103 (3): 657-62, 2011.[PUBMED Abstract]
  9. Al-Rahawan MM, Siebert JD, Mitchell CS, et al.: Durable complete response to chemotherapy in an infant with a clival chordoma. Pediatr Blood Cancer 59 (2): 323-5, 2012.[PUBMED Abstract]
  10. Casali PG, Messina A, Stacchiotti S, et al.: Imatinib mesylate in chordoma. Cancer 101 (9): 2086-97, 2004.[PUBMED Abstract]
  11. Stacchiotti S, Longhi A, Ferraresi V, et al.: Phase II study of imatinib in advanced chordoma. J Clin Oncol 30 (9): 914-20, 2012.[PUBMED Abstract]
  12. Lindén O, Stenberg L, Kjellén E: Regression of cervical spinal cord compression in a patient with chordoma following treatment with cetuximab and gefitinib. Acta Oncol 48 (1): 158-9, 2009.[PUBMED Abstract]
  13. Singhal N, Kotasek D, Parnis FX: Response to erlotinib in a patient with treatment refractory chordoma. Anticancer Drugs 20 (10): 953-5, 2009.[PUBMED Abstract]
  14. Stacchiotti S, Marrari A, Tamborini E, et al.: Response to imatinib plus sirolimus in advanced chordoma. Ann Oncol 20 (11): 1886-94, 2009.[PUBMED Abstract]
  15. Lebellec L, Chauffert B, Blay JY, et al.: Advanced chordoma treated by first-line molecular targeted therapies: Outcomes and prognostic factors. A retrospective study of the French Sarcoma Group (GSF/GETO) and the Association des Neuro-Oncologues d'Expression Française (ANOCEF). Eur J Cancer 79: 119-128, 2017.[PUBMED Abstract]
Treatment Options Under Clinical Evaluation for Childhood Chordoma

Information about National Cancer Institute (NCI)–supported clinical trials can be found on the NCI website. For information about clinical trials sponsored by other organizations, refer to the ClinicalTrials.gov website.

The following is an example of a national and/or institutional clinical trial that is currently being conducted:

Special Considerations for the Treatment of Children With Cancer

Cancer in children and adolescents is rare, although the overall incidence of childhood cancer has been slowly increasing since 1975.[ 1 ] Referral to medical centers with multidisciplinary teams of cancer specialists experienced in treating cancers that occur in childhood and adolescence should be considered for children and adolescents with cancer. This multidisciplinary team approach incorporates the skills of the following health care professionals and others to ensure that children receive treatment, supportive care, and rehabilitation that will achieve optimal survival and quality of life:

(Refer to the PDQ Supportive and Palliative Care summaries for specific information about supportive care for children and adolescents with cancer.)

Guidelines for pediatric cancer centers and their role in the treatment of pediatric patients with cancer have been outlined by the American Academy of Pediatrics.[ 2 ] At these pediatric cancer centers, clinical trials are available for most types of cancer that occur in children and adolescents, and the opportunity to participate in these trials is offered to most patients and their families. Clinical trials for children and adolescents diagnosed with cancer are generally designed to compare potentially better therapy with therapy that is currently accepted as standard. Most of the progress made in identifying curative therapy for childhood cancers has been achieved through clinical trials. Information about ongoing clinical trials is available from the NCI website.

Dramatic improvements in survival have been achieved for children and adolescents with cancer. Between 1975 and 2010, childhood cancer mortality decreased by more than 50%.[ 3 ] Childhood and adolescent cancer survivors require close monitoring because cancer therapy side effects may persist or develop months or years after treatment. (Refer to the PDQ summary on Late Effects of Treatment for Childhood Cancer for specific information about the incidence, type, and monitoring of late effects in childhood and adolescent cancer survivors.)

Childhood cancer is a rare disease, with about 15,000 cases diagnosed annually in the United States in individuals younger than 20 years.[ 4 ] The U.S. Rare Diseases Act of 2002 defines a rare disease as one that affects populations smaller than 200,000 persons. Therefore, all pediatric cancers are considered rare.

The designation of a rare tumor is not uniform among pediatric and adult groups. Adult rare cancers are defined as those with an annual incidence of fewer than six cases per 100,000 people, and they are estimated to account for up to 24% of all cancers diagnosed in the European Union and about 20% of all cancers diagnosed in the United States.[ 5 ][ 6 ] Also, the designation of a pediatric rare tumor is not uniform among international groups, as follows:

These rare cancers are extremely challenging to study because of the low incidence of patients with any individual diagnosis, the predominance of rare cancers in the adolescent population, and the lack of clinical trials for adolescents with rare cancers.

参考文献
  1. Smith MA, Seibel NL, Altekruse SF, et al.: Outcomes for children and adolescents with cancer: challenges for the twenty-first century. J Clin Oncol 28 (15): 2625-34, 2010.[PUBMED Abstract]
  2. Corrigan JJ, Feig SA; American Academy of Pediatrics: Guidelines for pediatric cancer centers. Pediatrics 113 (6): 1833-5, 2004.[PUBMED Abstract]
  3. Smith MA, Altekruse SF, Adamson PC, et al.: Declining childhood and adolescent cancer mortality. Cancer 120 (16): 2497-506, 2014.[PUBMED Abstract]
  4. Ward E, DeSantis C, Robbins A, et al.: Childhood and adolescent cancer statistics, 2014. CA Cancer J Clin 64 (2): 83-103, 2014 Mar-Apr.[PUBMED Abstract]
  5. Gatta G, Capocaccia R, Botta L, et al.: Burden and centralised treatment in Europe of rare tumours: results of RARECAREnet-a population-based study. Lancet Oncol 18 (8): 1022-1039, 2017.[PUBMED Abstract]
  6. DeSantis CE, Kramer JL, Jemal A: The burden of rare cancers in the United States. CA Cancer J Clin 67 (4): 261-272, 2017.[PUBMED Abstract]
  7. Ferrari A, Bisogno G, De Salvo GL, et al.: The challenge of very rare tumours in childhood: the Italian TREP project. Eur J Cancer 43 (4): 654-9, 2007.[PUBMED Abstract]
  8. Pappo AS, Krailo M, Chen Z, et al.: Infrequent tumor initiative of the Children's Oncology Group: initial lessons learned and their impact on future plans. J Clin Oncol 28 (33): 5011-6, 2010.[PUBMED Abstract]
  9. Howlader N, Noone AM, Krapcho M, et al., eds.: SEER Cancer Statistics Review, 1975-2012. Bethesda, Md: National Cancer Institute, 2015. Also available online. Last accessed February 20, 2020.[PUBMED Abstract]
Changes to This Summary (01/31/2020)

The PDQ cancer information summaries are reviewed regularly and updated as new information becomes available. This section describes the latest changes made to this summary as of the date above.

Prognosis

Added text about the results of a multicenter, retrospective study that identified 40 children with chordomas (cited Beccaria et al. as reference 9 and level of evidence 3iiiA).

This summary is written and maintained by the PDQ Pediatric Treatment Editorial Board, which is editorially independent of NCI. The summary reflects an independent review of the literature and does not represent a policy statement of NCI or NIH. More information about summary policies and the role of the PDQ Editorial Boards in maintaining the PDQ summaries can be found on the About This PDQ Summary and PDQ® - NCI's Comprehensive Cancer Database pages.

About This PDQ Summary

Purpose of This Summary

This PDQ cancer information summary for health professionals provides comprehensive, peer-reviewed, evidence-based information about the treatment of pediatric chordoma. It is intended as a resource to inform and assist clinicians who care for cancer patients. It does not provide formal guidelines or recommendations for making health care decisions.

Reviewers and Updates

This summary is reviewed regularly and updated as necessary by the PDQ Pediatric Treatment Editorial Board, which is editorially independent of the National Cancer Institute (NCI). The summary reflects an independent review of the literature and does not represent a policy statement of NCI or the National Institutes of Health (NIH).

Board members review recently published articles each month to determine whether an article should:

Changes to the summaries are made through a consensus process in which Board members evaluate the strength of the evidence in the published articles and determine how the article should be included in the summary.

Any comments or questions about the summary content should be submitted to Cancer.gov through the NCI website's Email Us. Do not contact the individual Board Members with questions or comments about the summaries. Board members will not respond to individual inquiries.

Levels of Evidence

Some of the reference citations in this summary are accompanied by a level-of-evidence designation. These designations are intended to help readers assess the strength of the evidence supporting the use of specific interventions or approaches. The PDQ Pediatric Treatment Editorial Board uses a formal evidence ranking system in developing its level-of-evidence designations.

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The preferred citation for this PDQ summary is:

PDQ® Pediatric Treatment Editorial Board. PDQ Childhood Chordoma Treatment. Bethesda, MD: National Cancer Institute. Updated <MM/DD/YYYY>. Available at: https://www.cancer.gov/types/bone/hp/child-chordoma-treatment-pdq. Accessed <MM/DD/YYYY>.

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