Background. Breast cancer (BC) is the leading cause of malignancy-related deaths among women aged Յ45 years. There are unexplored and uncertain issues for BC in this particular group in Latin America. The aim of this study is to evaluate BC incidence and mortality among young women and related clinicopathological and survivorship aspects in this region. Materials and Methods. Data were obtained from Globocan 2008 and the International Agency for Research on Cancer's Cancer Incidence in Five Continents series plus databases. We requested collaborationfromthe12differentnationalcancerin-stitutes in Latin America through SLACOM, the Latin American andCaribbeanSocietyofMedicalOncology,andconductedasystematic literature review to obtain local data regarding the prevalence of BC among young women and their characteristics, outcomes, and survivorship-related issues. Results. BC incidence and mortality proportions for Latin American women aged Ͻ44 years were higher when compared with those of developed countries (20% vs. 12% and 14% vs. 7%, respectively). We found only a few Latin American series addressing this topic, and prevalence varied between 8% and 14%. Stage II and III disease, high histological grade, and triple-negative and HER2 BC were features frequently observed among young Latin American BC patients. Conclusion. The rising incidence and mortality of BC in young Latin American women is a call to action in the region. It is necessary to monitor the epidemiological and clinical data through reliable cancer registries and to consider the implementation of protocols for education of patients and health professionals. This unmet, growing burden must be considered as a top priority of the national programs in the fight against BC, and models of specialized units should be implemented for this particular group of patients to provide better care for this emergent challenge. The Oncologist 2013;18: 1298 -1306 Implications for Practice: This review illustrates that breast cancer (BC) among Latin American women is a growing burden throughout the region. The increased proportion of BC cases in young women is important because their diagnoses and tumor behavior are usually more aggressive than in their older counterparts. The findings of this study reveal that there is scarce information regarding this matter in Latin American countries, especially concerning the particular effects and complications that this group of women face during and after treatment. Also, there are no specific clinical or educational programs that focus on this population. A call to action from health policy planners, medical providers, researchers, BC patients, families, and the community in general is deserved for better care of this emergent challenge.

Purpose. We examined the impact of diabetes and hyperglycemia on cancer-specific survival of patients with metastatic or recurrent breast cancer (BC). Methods. We performed a retrospective analysis of 265 patients with advanced BC receiving palliative chemotherapy. BC-specific mortality was compared for diabetic and nondiabetic patients as well as for patients that presented hyperglycemia during treatment. Results. No difference was observed between the diabetic and nondiabetic patients in terms of overall survival (OS). A difference in OS was observed between nondiabetic patients and diabetic patients who had hyperglycemia. The OS was greater in diabetic patients with proper metabolic control than diabetic patients with hyperglycemia. The risk of death was higher in patients with mean glucose levels >130 mg/dL during treatment. Several factors were associated with poor OS: tumor stage, hormone-receptor-negative tumors, HER2 negative disease, multiple metastatic sites, presence of visceral metastases, and mean glucose >130 mg/dL. Conclusion. Elevated glucose levels are associated with a poor outcome in diabetic and nondiabetic patients in contrast to patients with normoglycemic levels, conferring an elevated risk of death. According to these results, clinicians should monitor glucose levels during treatment for advanced breast cancer disease and take action to maintain normal glucose levels.

Background. Breast cancer (BC) is the leading cause of malignancy-related deaths among women aged Յ45 years. There are unexplored and uncertain issues for BC in this particular group in Latin America. The aim of this study is to evaluate BC incidence and mortality among young women and related clinicopathological and survivorship aspects in this region. Materials and Methods. Data were obtained from Globocan 2008 and the International Agency for Research on Cancer's Cancer Incidence in Five Continents series plus databases. We requested collaborationfromthe12differentnationalcancerin-stitutes in Latin America through SLACOM, the Latin American andCaribbeanSocietyofMedicalOncology,andconductedasystematic literature review to obtain local data regarding the prevalence of BC among young women and their characteristics, outcomes, and survivorship-related issues. Results. BC incidence and mortality proportions for Latin American women aged Ͻ44 years were higher when compared with those of developed countries (20% vs. 12% and 14% vs. 7%, respectively). We found only a few Latin American series addressing this topic, and prevalence varied between 8% and 14%. Stage II and III disease, high histological grade, and triple-negative and HER2 BC were features frequently observed among young Latin American BC patients. Conclusion. The rising incidence and mortality of BC in young Latin American women is a call to action in the region. It is necessary to monitor the epidemiological and clinical data through reliable cancer registries and to consider the implementation of protocols for education of patients and health professionals. This unmet, growing burden must be considered as a top priority of the national programs in the fight against BC, and models of specialized units should be implemented for this particular group of patients to provide better care for this emergent challenge. The Oncologist 2013;18: 1285-1297 Implications for Practice: This review illustrates that breast cancer (BC) among Latin American women is a growing burden throughout the region. The increased proportion of BC cases in young women is important because their diagnoses and tumor behavior are usually more aggressive than in their older counterparts. The findings of this study reveal that there is scarce information regarding this matter in Latin American countries, especially concerning the particular effects and complications that this group of women face during and after treatment. Also, there are no specific clinical or educational programs that focus on this population. A call to action from health policy planners, medical providers, researchers, BC patients, families, and the community in general is deserved for better care of this emergent challenge.

Objective To describe clinical and information needs, identify unmet support services and guide interventions for young breast cancer (BC) patients in Mexico. Methods Cross‐sectional, qualitative study, using interpretive description methodology. Patients with initial BC diagnosis within 6–12 months prior to enrolment, ≤40 years old and literate were included in focus groups. Results Twenty‐nine patients were included. Expressed needs were classified into the following categories: (a) understanding diagnosis and treatment; (b) treatment side effects; and (c) time, source and communication means. Patients felt their medical team did not provide enough information regarding diagnosis, treatment and relevant side effects related to fertility, menopause and sexuality. Lack of information fuelled uncertainty, distress, anxiety and fear, and could negatively influence treatment decisions. Patients wished that news be communicated considering their own attitude regarding the disease and providing psychological support when necessary, including partners, relatives and friends. They recommended that information should be delivered with an empathic and personalised approach, with take‐home educational material to help them recall, comprehend and/or expand verbal information received during medical appointments. Conclusions This study provides valuable insight to increase attention on unmet needs of young BC patients and to improve doctor–patient communication to ensure better care.

510 Background: Trastuzumab (T) increases the incidence of cardiac events (CEs) in patients (pts) with early breast cancer (BC). Dual blockade with P+T improves BC outcomes and is the standard of care for high-risk HER2-positive BC pts following the phase 3 APHINITY trial that evaluated the addition of P or placebo (Pla) to T and chemotherapy (CT). We analyzed the cardiac safety of P+T in APHINITY. Methods: APHINITY eligibility required a left ventricular ejection fraction (LVEF) ≥55% at study entry. LVEF assessment was performed every 3 months (mos) during treatment, every 6 mos up to month 36, and yearly thereafter. Primary CE was defined as heart failure (HF) class III/IV and a significant decrease in LVEF of at least 10 percentage points from baseline and to <50%, or cardiac death. Secondary CE was defined as a confirmed significant decrease in LVEF or CEs confirmed by the cardiac advisory board. Results: The safety analysis population consists of 4,769 pts. With 74 mos median follow-up (FU), CEs were observed in 159 pts (3.3%): 83 (3.5%) in the P+T and 76 (3.2%) in Pla+T arms, respectively. Most CEs occurred during anti-HER2 therapy: 123/159 (77.4%) and were asymptomatic or mildly symptomatic LVEF decrease (133/159; 83.6%) (Table 1). There were 2 cardiac deaths in each arm (0.1%). More CEs occurred in pts receiving an anthracycline-based CT compared to those receiving non-anthracycline CT (139 vs. 20 CEs, respectively). Acute recovery from a CE based on subsequent LVEF values was observed in 127/155 pts (81.9%). Conclusions: Dual blockade with P+T does not increase the risk of CE compared to Pla+T alone. The use of anthracycline-based CT increases the risk of a CE; hence non-anthracycline CT may be considered particularly in pts with other cardiovascular risk factors. Clinical trial information: NCT01358877. [Table: see text]

Background: In Mexico, it is recognized that breast cancer (BC) is diagnosed at younger ages than that reported in the US and other populations. Although national data is not available regarding BC age of diagnosis distribution, data from the INCAN, the main referral center in Mexico, showed that 17% of the total 893 newly diagnosed BC patients seen in 2012 were younger than 40 years old (which is more than twice that -7%- reported for US BC patients). We conducted a retrospective study in order to describe the frequency of BC among young Mexican BC patients, as well as their pathological characteristics at diagnosis and patters of recurrence. Methods: Clinical and pathologic data from young pts (≤42 years old) who were newly diagnosed with invasive BC between January 2007 and December 2010 at the INCAN in Mexico and were followed for at least 2 years were identified. Clinical stage at diagnosis was recorded and estrogen receptor, progesterone receptor and HER2 expression were determined by immunohistochemistry and/or FISH. Proportion differences were tested using the Chi-square test. Results: 445 young patients were identified from a total of 2919 BC patients (15%). A total of 320 patients met the inclusion criteria for analysis. Median age of diagnosis was 36 years (19-42). 49% of patients were very young patients (≤ 35 years). 19% were diagnosed as early disease, 67.5% as locally advanced BC and 13.5% as metastatic. 32% of patients had triple negative BC disease, while 27% were HER2 positive. From the non-metastatic patients at diagnosis, 31% developed recurrence (65% systemic, 21% loco regional and 14% both). After a median follow-up of 26 months, 18% of the 320 patients died secondary to BC disease progression. Conclusions: Although this series corresponds to patients treated at a reference national center, the data reported in this study suggests that BC among young women is very prevalent in Mexico compared to other populations. The causes underlying the striking difference in age at diagnosis in Mexican BC patients are unknown and have not been investigated, including the genetic contributing factors. As reported in non-Hispanic population studies, BC among young women is diagnosed in more advanced stages, and triple-negative and HER2 positive diseases are more frequent. It is associated with a high proportion of systemic and loco regional recurrence, with a dismal prognosis. Due to the substantial number of BC cases among young women in Mexico, its prospective study is more than justified. In order to meet with this goal, our group is preparing the establishment of the Mexican Young Women's Breast Cancer Cohort Program at the INCAN in Mexico and to launch the related scientific projects related to this plan. Citation Information: Cancer Res 2013;73(24 Suppl): Abstract nr P5-12-10.

134 Background: Breast cancer in older women has a tendency to increase its incidence; the prevalence and their clinical course are not reported. This group of patients is usually considered to be fragile; they receive dose levels of chemotherapy below standards. Objective: To compare the association of dose intensity with complete pathological response (cPR) in older women. Methods: This is a retrospective analysis of patients treated with neoadjuvant anthracyclines, taxanes, or combination regimen from 2005 to 2008. Pathologic response was evaluated in the surgical specimen. Results: We analyzed 801 cases, 694 (86.6%) patients were younger than 65 years-old and 107 (13.3%) were older than 65 years-old. Clinical stage, histological type and HER2 status were similar in both groups. High-grade lesions were more common in the younger group (61% vs. 41% p>0.05). ER+/PR+ were more frequent for the group >65 years-old (57.5/47% vs. 79.5/50%) p=NS. Triple-negative were 154 cases (22%) for younger patients and 14 cases (13%) for elderly women (p=0.02). Optimal dose intensity was above 80% of planned dose. For anthracycline-based regimen, older patients had more dose reduction (27.8%) in comparison to the younger group 2.1% (p= 0.00001), for the taxane regimen dose intensity was less than the standard in 8.8% of young population vs. 17.6% for older women (p = 0.03). The rate of cPR in younger patients was 20.3% vs. 11.1% in the older group (p<0.001). Toxicity profile was statistically similar in both groups. Conclusions: Breast cancer has the same presentation in younger and in older patients. Older patients receive less dose intense chemotherapy. This is associated with a lesser rate of cPR. Therefore, older patient should be treated with full doses taking into account the toxicity profile of the chemotherapeutic regimens as well as the physical and medical conditions of the patient.

e12027 Background: Clinical experience and previous studies suggest that women with diabetes and breast cancer (BrCa) have worse outcomes than their non-diabetic counterparts. However, analysis of the contribution of diabetes to BrCa specific mortality is difficult because of the substantial mortality attributed to diabetes alone and because diabetes is commonly associated with adverse prognostic factors specific to BrCa. The purpose of this study was to examine the impact of diabetes and hyperglycemia on cancer-specific survival of patients with metastatic or recurrent BrCa. Methods: We performed a retrospective analysis of patients with advanced BrCa receiving palliative chemotherapy from 2006 to 2011 at the National Cancer Institute in Mexico, and compared breast cancer-specific mortality in diabetic and non-diabetic patients, as well as in patients that presented hyperglycemia during palliative treatment. Results: A total of 265 patients receiving palliative therapy were eligible for inclusion. Previous diagnosis or detection of diabetes at recurrence was recorded in 40 patients (15%). No difference was observed between diabetic and non-diabetic patients in terms of overall survival (OS). A statistically significant difference in OS was observed between patients without diabetes and diabetics who had hyperglycemia (p=0.003). OS in diabetic patients with proper metabolic control was shown to be superior compared to diabetics with hyperglycemia (p=0.01). Hyperglycemia was identified in 14% of non-diabetics at some point while receiving palliative treatment. For patients that experienced hyperglycemia during treatment or who had a mean glucose level > 130, either in the diabetic or non-diabetic subgroups, a worse outcome was noted compared to normoglycemic patients, with a HR of 1.5 (p=0.029) and HR of 2.04 (p=0.006) for death, respectively. Conclusions: Elevated glucose levels confer a poor outcome in diabetic and non-diabetic patients in contrast with patients with normoglycemic levels, conferring an elevated risk of death. According to these results, clinicians must monitor glucose levels during treatment for advanced BrCa disease, and should take action in order to maintain normal glucose levels.