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医療専門家向け Childhood Breast Cancer 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 childhood breast cancer. 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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Fibroadenoma

Fibroadenoma is the most frequent breast tumor seen in children.[ 1 ][ 2 ] Sudden rapid enlargement of a suspected fibroadenoma is an indication for needle biopsy or excision, as rare transformation leading to malignant phyllodes tumors has been reported.[ 3 ]

Other benign lesions include tubular adenoma, benign phyllodes tumor, and benign fibroepithelial neoplasm.[ 4 ]

Treatment of Fibroadenoma

Treatment options for fibroadenoma include the following:

  1. Observation. Many tumors will regress without a need for surgical resection.[ 2 ][ 4 ]

Treatment options for phyllodes tumors include the following:

  1. Wide local excision without mastectomy.[ 3 ]
参考文献
  1. Jayasinghe Y, Simmons PS: Fibroadenomas in adolescence. Curr Opin Obstet Gynecol 21 (5): 402-6, 2009.[PUBMED Abstract]
  2. Lee M, Soltanian HT: Breast fibroadenomas in adolescents: current perspectives. Adolesc Health Med Ther 6: 159-63, 2015.[PUBMED Abstract]
  3. Valdes EK, Boolbol SK, Cohen JM, et al.: Malignant transformation of a breast fibroadenoma to cystosarcoma phyllodes: case report and review of the literature. Am Surg 71 (4): 348-53, 2005.[PUBMED Abstract]
  4. McLaughlin CM, Gonzalez-Hernandez J, Bennett M, et al.: Pediatric breast masses: an argument for observation. J Surg Res 228: 247-252, 2018.[PUBMED Abstract]
Childhood Breast Cancer

Incidence and Outcome

Breast cancer has been reported in both males and females younger than 21 years.[ 1 ][ 2 ][ 3 ][ 4 ][ 5 ][ 6 ][ 7 ] A review of the Surveillance, Epidemiology, and End Results (SEER) database of the National Cancer Institute shows that 75 cases of malignant breast tumors in females aged 19 years or younger were identified from 1973 to 2004.[ 8 ] Fifteen percent of these patients had in situ disease, 85% had invasive disease, 55% of the tumors were carcinomas, and 45% of the tumors were sarcomas—most of which were phyllodes tumors. Only three patients in the carcinoma group presented with metastatic disease, while 11 patients (27%) had regionally advanced disease. All patients with sarcomas presented with localized disease. Of the carcinoma patients, 85% underwent surgical resection, and 10% received adjuvant radiation therapy. Of the sarcoma patients, 97% had surgical resection, and 9% received radiation. The 5- and 10-year survival rates for patients with sarcomatous tumors were both 90%; for patients with carcinomas, the 5-year survival rate was 63% and the 10-year survival rate was 54%.

A National Cancer Database report described 181 cases of breast malignancy in patients aged 21 years and younger; 65% of patients had invasive carcinoma and the remaining patients had sarcoma or malignant phyllodes. In this study, the authors compared the pediatric patients with the adult patients and found that pediatric patients were more likely to have an undifferentiated malignancy, more advanced disease at presentation, and more variable management. Outcomes between children and adults were similar.[ 9 ]

A subsequent report from the SEER database (1973–2009) discovered 91 girls aged 10 to 20 years with breast cancer, predominantly carcinomas (57% invasive, 5.5% in situ) and sarcomas (37%, mostly phyllodes tumors). The mortality rate was 46.6% for patients with regional disease and 18.7% for patients with localized disease. The mortality rates for the patients in this study were higher than the rates for premenopausal and postmenopausal women, although the sample size was small.[ 10 ][Level of evidence: 3iiA]

While rare, breast cancer has also been described in males. In a review of the National Cancer Database, 677 male adolescents and young adults were diagnosed with breast cancer during the period of 1998 to 2010; most patients (82%) had invasive disease. Age younger than 25 years and absence of nodal evaluation at the time of surgery were associated with worse outcomes.[ 7 ]

Breast tumors may also occur as metastatic deposits from leukemia, rhabdomyosarcoma, other sarcomas, or lymphoma (particularly in patients who are infected with HIV).

Risk Factors

Risk factors for breast cancer in adolescents and young adults (AYA) include the following:

  1. Previous malignancy. A retrospective review of the American College of Surgeons National Cancer Database from 1998 to 2010 identified 106,771 patients aged 15 to 39 years with breast cancer.[ 11 ] Of these patients, 6,241 (5.8%) had experienced a previous histologically distinct malignancy. Patients with breast cancer as a subsequent neoplasm had a significantly decreased 3-year overall survival rate (79% vs. 88.5%, P < .001), with subsequent neoplasm status identified as an independent risk factor for increased mortality (hazard ratio, 1.58; 95% confidence interval, 1.41–1.77).
  2. Chest irradiation. There is an increased lifetime risk of breast cancer in female survivors of Hodgkin lymphoma who were treated with radiation to the chest area; however, breast cancer is also seen in patients who were treated for any cancer that was treated with chest irradiation.[ 5 ][ 12 ][ 13 ][ 14 ][ 15 ][Level of evidence: 1A] Carcinomas are more frequent than sarcomas.

    Mammograms with adjunctive breast magnetic resonance imaging (MRI) start at age 25 years or 10 years postexposure to radiation therapy (whichever came last). (Refer to the PDQ summary on the Late Effects of Treatment for Childhood Cancer for more information about secondary breast cancers.)

Treatment of Breast Cancer in Adolescents and Young Adults (AYA)

Breast cancer is the most frequently diagnosed cancer among AYA women aged 15 to 39 years, accounting for about 14% of all AYA cancer diagnoses.[ 16 ] Breast cancer in this age group has a more aggressive course and worse outcome than in older women. Expression of hormone receptors for estrogen, progesterone, and human epidermal growth factor receptor 2 (HER2) on breast cancer in the AYA group is also different from that in older women and correlates with a worse prognosis.[ 11 ][ 17 ] In a review of data from the National Cancer Database, AYA patients (aged 15–39 years) had more triple-negative breast cancer (TNBC) or HER2-positive (HER2+) cancer than did adult patients (TNBC: 21.2% vs. 13.8%, respectively; HER2+: 26.0% vs. 18.6%, respectively; both P < .001). In addition, AYA patients aged 15 to 29 years had more advanced disease and TNBC or HER2+ disease than did AYA patients aged 30 to 39 years.[ 18 ][Level of evidence: 3iA]

Treatment of the AYA group is similar to that of older women. However, unique aspects of management must include attention to genetic implications (i.e., familial breast cancer syndromes) and fertility.[ 19 ][ 20 ]

(Refer to the PDQ summary on Breast Cancer Treatment [Adult] or the PDQ summary on Genetics of Breast and Gynecologic Cancers for more information.)

Treatment Options Under Clinical Evaluation for Childhood and AYA Breast Cancer

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:

参考文献
  1. Serour F, Gilad A, Kopolovic J, et al.: Secretory breast cancer in childhood and adolescence: report of a case and review of the literature. Med Pediatr Oncol 20 (4): 341-4, 1992.[PUBMED Abstract]
  2. Drukker BH: Breast disease: a primer on diagnosis and management. Int J Fertil Womens Med 42 (5): 278-87, 1997 Sep-Oct.[PUBMED Abstract]
  3. Rogers DA, Lobe TE, Rao BN, et al.: Breast malignancy in children. J Pediatr Surg 29 (1): 48-51, 1994.[PUBMED Abstract]
  4. Rivera-Hueto F, Hevia-Vázquez A, Utrilla-Alcolea JC, et al.: Long-term prognosis of teenagers with breast cancer. Int J Surg Pathol 10 (4): 273-9, 2002.[PUBMED Abstract]
  5. Kaste SC, Hudson MM, Jones DJ, et al.: Breast masses in women treated for childhood cancer: incidence and screening guidelines. Cancer 82 (4): 784-92, 1998.[PUBMED Abstract]
  6. Costa NM, Rodrigues H, Pereira H, et al.: Secretory breast carcinoma--case report and review of the medical literature. Breast 13 (4): 353-5, 2004.[PUBMED Abstract]
  7. Flaherty DC, Bawa R, Burton C, et al.: Breast Cancer in Male Adolescents and Young Adults. Ann Surg Oncol 24 (1): 84-90, 2017.[PUBMED Abstract]
  8. Gutierrez JC, Housri N, Koniaris LG, et al.: Malignant breast cancer in children: a review of 75 patients. J Surg Res 147 (2): 182-8, 2008.[PUBMED Abstract]
  9. Richards MK, Goldin AB, Beierle EA, et al.: Breast Malignancies in Children: Presentation, Management, and Survival. Ann Surg Oncol 24 (6): 1482-1491, 2017.[PUBMED Abstract]
  10. Murthy V, Pawar S, Chamberlain RS: Disease Severity, Presentation, and Clinical Outcomes Among Adolescents With Malignant Breast Neoplasms: A 20-Year Population-Based Outcomes Study From the SEER Database (1973-2009). Clin Breast Cancer 17 (5): 392-398, 2017.[PUBMED Abstract]
  11. Sadler C, Goldfarb M: Comparison of primary and secondary breast cancers in adolescents and young adults. Cancer 121 (8): 1295-302, 2015.[PUBMED Abstract]
  12. Metayer C, Lynch CF, Clarke EA, et al.: Second cancers among long-term survivors of Hodgkin's disease diagnosed in childhood and adolescence. J Clin Oncol 18 (12): 2435-43, 2000.[PUBMED Abstract]
  13. Swerdlow AJ, Barber JA, Hudson GV, et al.: Risk of second malignancy after Hodgkin's disease in a collaborative British cohort: the relation to age at treatment. J Clin Oncol 18 (3): 498-509, 2000.[PUBMED Abstract]
  14. van Leeuwen FE, Klokman WJ, Veer MB, et al.: Long-term risk of second malignancy in survivors of Hodgkin's disease treated during adolescence or young adulthood. J Clin Oncol 18 (3): 487-97, 2000.[PUBMED Abstract]
  15. Henderson TO, Amsterdam A, Bhatia S, et al.: Systematic review: surveillance for breast cancer in women treated with chest radiation for childhood, adolescent, or young adult cancer. Ann Intern Med 152 (7): 444-55; W144-54, 2010.[PUBMED Abstract]
  16. Keegan TH, DeRouen MC, Press DJ, et al.: Occurrence of breast cancer subtypes in adolescent and young adult women. Breast Cancer Res 14 (2): R55, 2012.[PUBMED Abstract]
  17. Anders CK, Hsu DS, Broadwater G, et al.: Young age at diagnosis correlates with worse prognosis and defines a subset of breast cancers with shared patterns of gene expression. J Clin Oncol 26 (20): 3324-30, 2008.[PUBMED Abstract]
  18. Murphy BL, Day CN, Hoskin TL, et al.: Adolescents and Young Adults with Breast Cancer have More Aggressive Disease and Treatment Than Patients in Their Forties. Ann Surg Oncol 26 (12): 3920-3930, 2019.[PUBMED Abstract]
  19. Gabriel CA, Domchek SM: Breast cancer in young women. Breast Cancer Res 12 (5): 212, 2010.[PUBMED Abstract]
  20. Tichy JR, Lim E, Anders CK: Breast cancer in adolescents and young adults: a review with a focus on biology. J Natl Compr Canc Netw 11 (9): 1060-9, 2013.[PUBMED Abstract]
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.

Information about these tumors may also be found in sources relevant to adults with cancer such as the PDQ summary on Breast Cancer Treatment (Adult).

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 (06/08/2020)

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.

Childhood Breast Cancer

Added text to state that in a review of data from the National Cancer Database, adolescents and young adult (AYA) patients had more triple-negative breast cancer (TNBC) or HER2-positive (HER2+) cancer than did adult patients. In addition, AYA patients aged 15 to 29 years had more advanced disease and TNBC or HER2+ disease than did AYA patients aged 30 to 39 years (cited Murphy et al. as reference 18 and level of evidence 3iA).

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 childhood breast cancer. 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.

Permission to Use This Summary

PDQ is a registered trademark. Although the content of PDQ documents can be used freely as text, it cannot be identified as an NCI PDQ cancer information summary unless it is presented in its entirety and is regularly updated. However, an author would be permitted to write a sentence such as “NCI’s PDQ cancer information summary about breast cancer prevention states the risks succinctly: [include excerpt from the summary].”

The preferred citation for this PDQ summary is:

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

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