Brain metastases after breast-conserving therapy and systemic therapy: incidence and characteristics by biologic subtype

The characteristics of brain metastases (BM) that develop after breast-conserving therapy (BCT) for early-stage breast cancer (BC) remain incompletely defined. We examined 1,434 consecutive patients with stage I/II invasive BC who received BCT from 1997 to 2006, 91 % of whom received adjuvant system...

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Veröffentlicht in:Breast cancer research and treatment 2012-11, Vol.136 (1), p.153-160
Hauptverfasser: Arvold, Nils D., Oh, Kevin S., Niemierko, Andrzej, Taghian, Alphonse G., Lin, Nancy U., Abi-Raad, Rita F., Sreedhara, Meera, Harris, Jay R., Alexander, Brian M.
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container_issue 1
container_start_page 153
container_title Breast cancer research and treatment
container_volume 136
creator Arvold, Nils D.
Oh, Kevin S.
Niemierko, Andrzej
Taghian, Alphonse G.
Lin, Nancy U.
Abi-Raad, Rita F.
Sreedhara, Meera
Harris, Jay R.
Alexander, Brian M.
description The characteristics of brain metastases (BM) that develop after breast-conserving therapy (BCT) for early-stage breast cancer (BC) remain incompletely defined. We examined 1,434 consecutive patients with stage I/II invasive BC who received BCT from 1997 to 2006, 91 % of whom received adjuvant systemic therapy, according to BC subtype. Median follow-up was 85 months. Overall 5-year cumulative incidence of BM was 1.7 %; 0.1 % for luminal A, 3.3 % for luminal B, 3.2 % for luminal-HER2, 3.7 % for HER2, and 7.4 % for triple negative (TN). Women who developed BM were more likely at BC diagnosis to be younger ( P  
doi_str_mv 10.1007/s10549-012-2243-x
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We examined 1,434 consecutive patients with stage I/II invasive BC who received BCT from 1997 to 2006, 91 % of whom received adjuvant systemic therapy, according to BC subtype. Median follow-up was 85 months. Overall 5-year cumulative incidence of BM was 1.7 %; 0.1 % for luminal A, 3.3 % for luminal B, 3.2 % for luminal-HER2, 3.7 % for HER2, and 7.4 % for triple negative (TN). Women who developed BM were more likely at BC diagnosis to be younger ( P  &lt; .0001) and have node-positive ( P  &lt; .0001), grade 3 ( P  &lt; .0001), hormone receptor-negative ( P  = .006), and HER2-positive ( P  = .01) tumors. Median time from BC diagnosis to BM was 51.4 months (range, 7.6–108 months), which was longer among luminal versus non-luminal subtypes ( P  = .0002; median, 61.4 vs. 34.5 months). Thirty-four percent of patients who developed distant metastases (DM) eventually developed BM. Median time from DM to BM was 12.8 months but varied by subtype, including 7.4 months for TN, 9.6 months for luminal B, and 27.1 months for HER2. Eighty-one percent of all BM patients presented with neurologic symptoms. Median number of BM at diagnosis was two, and median BM size was 15 mm, with TN (27 mm) and luminal B (16 mm) exhibiting the largest median sizes. In conclusion, the risk of BM after BCT varies significantly by subtype. Given the large size and symptomatic presentation among luminal B and TN subtypes, earlier BM detection might improve quality of life or increase eligibility for non-invasive treatments including stereotactic radiosurgery. Women with DM from these two BC subtypes have a high incidence of BM with a short latency, suggesting an ideal target population for trials evaluating the utility of MRI screening.</description><identifier>ISSN: 0167-6806</identifier><identifier>EISSN: 1573-7217</identifier><identifier>DOI: 10.1007/s10549-012-2243-x</identifier><identifier>PMID: 22968656</identifier><identifier>CODEN: BCTRD6</identifier><language>eng</language><publisher>Boston: Springer US</publisher><subject>Adult ; Aged ; Biological and medical sciences ; Brain ; Brain Neoplasms - epidemiology ; Brain Neoplasms - secondary ; Brain Neoplasms - therapy ; Breast cancer ; Breast Neoplasms - epidemiology ; Breast Neoplasms - pathology ; Breast Neoplasms - therapy ; Cancer research ; Cancer therapies ; Clinical Trial ; Female ; Follow-Up Studies ; Gynecology. Andrology. Obstetrics ; Humans ; Incidence ; Kaplan-Meier Estimate ; Lumpectomy ; Mammary gland diseases ; Medical sciences ; Medicine ; Medicine &amp; Public Health ; Metastasis ; Middle Aged ; Neoplasm Staging ; Neurology ; Oncology ; Radiosurgery ; Radiotherapy, Adjuvant ; Receptor, ErbB-2 - metabolism ; Receptors, Estrogen - metabolism ; Receptors, Progesterone - metabolism ; Risk factors ; Tumors ; Tumors of the nervous system. 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We examined 1,434 consecutive patients with stage I/II invasive BC who received BCT from 1997 to 2006, 91 % of whom received adjuvant systemic therapy, according to BC subtype. Median follow-up was 85 months. Overall 5-year cumulative incidence of BM was 1.7 %; 0.1 % for luminal A, 3.3 % for luminal B, 3.2 % for luminal-HER2, 3.7 % for HER2, and 7.4 % for triple negative (TN). Women who developed BM were more likely at BC diagnosis to be younger ( P  &lt; .0001) and have node-positive ( P  &lt; .0001), grade 3 ( P  &lt; .0001), hormone receptor-negative ( P  = .006), and HER2-positive ( P  = .01) tumors. Median time from BC diagnosis to BM was 51.4 months (range, 7.6–108 months), which was longer among luminal versus non-luminal subtypes ( P  = .0002; median, 61.4 vs. 34.5 months). Thirty-four percent of patients who developed distant metastases (DM) eventually developed BM. Median time from DM to BM was 12.8 months but varied by subtype, including 7.4 months for TN, 9.6 months for luminal B, and 27.1 months for HER2. Eighty-one percent of all BM patients presented with neurologic symptoms. Median number of BM at diagnosis was two, and median BM size was 15 mm, with TN (27 mm) and luminal B (16 mm) exhibiting the largest median sizes. In conclusion, the risk of BM after BCT varies significantly by subtype. Given the large size and symptomatic presentation among luminal B and TN subtypes, earlier BM detection might improve quality of life or increase eligibility for non-invasive treatments including stereotactic radiosurgery. Women with DM from these two BC subtypes have a high incidence of BM with a short latency, suggesting an ideal target population for trials evaluating the utility of MRI screening.</description><subject>Adult</subject><subject>Aged</subject><subject>Biological and medical sciences</subject><subject>Brain</subject><subject>Brain Neoplasms - epidemiology</subject><subject>Brain Neoplasms - secondary</subject><subject>Brain Neoplasms - therapy</subject><subject>Breast cancer</subject><subject>Breast Neoplasms - epidemiology</subject><subject>Breast Neoplasms - pathology</subject><subject>Breast Neoplasms - therapy</subject><subject>Cancer research</subject><subject>Cancer therapies</subject><subject>Clinical Trial</subject><subject>Female</subject><subject>Follow-Up Studies</subject><subject>Gynecology. Andrology. Obstetrics</subject><subject>Humans</subject><subject>Incidence</subject><subject>Kaplan-Meier Estimate</subject><subject>Lumpectomy</subject><subject>Mammary gland diseases</subject><subject>Medical sciences</subject><subject>Medicine</subject><subject>Medicine &amp; Public Health</subject><subject>Metastasis</subject><subject>Middle Aged</subject><subject>Neoplasm Staging</subject><subject>Neurology</subject><subject>Oncology</subject><subject>Radiosurgery</subject><subject>Radiotherapy, Adjuvant</subject><subject>Receptor, ErbB-2 - metabolism</subject><subject>Receptors, Estrogen - metabolism</subject><subject>Receptors, Progesterone - metabolism</subject><subject>Risk factors</subject><subject>Tumors</subject><subject>Tumors of the nervous system. 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We examined 1,434 consecutive patients with stage I/II invasive BC who received BCT from 1997 to 2006, 91 % of whom received adjuvant systemic therapy, according to BC subtype. Median follow-up was 85 months. Overall 5-year cumulative incidence of BM was 1.7 %; 0.1 % for luminal A, 3.3 % for luminal B, 3.2 % for luminal-HER2, 3.7 % for HER2, and 7.4 % for triple negative (TN). Women who developed BM were more likely at BC diagnosis to be younger ( P  &lt; .0001) and have node-positive ( P  &lt; .0001), grade 3 ( P  &lt; .0001), hormone receptor-negative ( P  = .006), and HER2-positive ( P  = .01) tumors. Median time from BC diagnosis to BM was 51.4 months (range, 7.6–108 months), which was longer among luminal versus non-luminal subtypes ( P  = .0002; median, 61.4 vs. 34.5 months). Thirty-four percent of patients who developed distant metastases (DM) eventually developed BM. Median time from DM to BM was 12.8 months but varied by subtype, including 7.4 months for TN, 9.6 months for luminal B, and 27.1 months for HER2. Eighty-one percent of all BM patients presented with neurologic symptoms. Median number of BM at diagnosis was two, and median BM size was 15 mm, with TN (27 mm) and luminal B (16 mm) exhibiting the largest median sizes. In conclusion, the risk of BM after BCT varies significantly by subtype. Given the large size and symptomatic presentation among luminal B and TN subtypes, earlier BM detection might improve quality of life or increase eligibility for non-invasive treatments including stereotactic radiosurgery. Women with DM from these two BC subtypes have a high incidence of BM with a short latency, suggesting an ideal target population for trials evaluating the utility of MRI screening.</abstract><cop>Boston</cop><pub>Springer US</pub><pmid>22968656</pmid><doi>10.1007/s10549-012-2243-x</doi><tpages>8</tpages></addata></record>
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identifier ISSN: 0167-6806
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source MEDLINE; SpringerLink Journals - AutoHoldings
subjects Adult
Aged
Biological and medical sciences
Brain
Brain Neoplasms - epidemiology
Brain Neoplasms - secondary
Brain Neoplasms - therapy
Breast cancer
Breast Neoplasms - epidemiology
Breast Neoplasms - pathology
Breast Neoplasms - therapy
Cancer research
Cancer therapies
Clinical Trial
Female
Follow-Up Studies
Gynecology. Andrology. Obstetrics
Humans
Incidence
Kaplan-Meier Estimate
Lumpectomy
Mammary gland diseases
Medical sciences
Medicine
Medicine & Public Health
Metastasis
Middle Aged
Neoplasm Staging
Neurology
Oncology
Radiosurgery
Radiotherapy, Adjuvant
Receptor, ErbB-2 - metabolism
Receptors, Estrogen - metabolism
Receptors, Progesterone - metabolism
Risk factors
Tumors
Tumors of the nervous system. Phacomatoses
title Brain metastases after breast-conserving therapy and systemic therapy: incidence and characteristics by biologic subtype
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