Color or money?: The impact of socioeconomic status and race/ethnicity on breast cancer mortality.

BACKGROUND: Although the incidence of breast cancer is highest in White women, Black women die at a higher rate. Our aim was to compare the relative association between race/ethnicity and socioeconomic status on breast cancer mortality. METHODS: We identified female breast cancer patients diagnosed between 2007 - 2011 and followed through 2016 in the SEER database. Patients were grouped into socioeconomic quartiles by a prosperity index. The primary outcome of interest was 5-year cancer-specific survival. RESULTS: A total of 286,520 patients were included. Five-year survival was worst for Black women compared to other races/ethnicities in each socioeconomic quartile. When compared to White women in the lowest quartile, Black women in the lowest quartile, 2nd quartile, and 3rd quartile experienced the lowest 5-year survival rates (Hazard ratio 1.33, 1.23, 1.20; P < 0.01). CONCLUSION: Regarding cancer mortality, only in the most prosperous quartile do Black women achieve a similar outcome to the poorest quartile White women.

Persistence of Disparity in Thyroid Cancer Survival After Adjustments for Socioeconomic Status and Access.

INTRODUCTION: Thyroid cancer incidence has increased substantially in the past 4 decades, estimated at 3.5% annually. Incidence is highest in white patients, yet black patients have the worst survival. Racial/ethnic differences in presentation and outcomes are hypothesized to be a result of differences in access to care. Analyses delineating the relative contribution of access to racial/ethnic survival disparities are scarce. We aimed to explore the association of delay in access to care and early/increased detection with racial/ethnic disparities in thyroid cancer survival. METHODS: The Surveillance, Epidemiology, and End Results (SEER) database was queried from 2007 to 2011 for patients with a first primary thyroid cancer diagnosis and up to 5 years of follow-up. Composite scores were generated from county-level variables to capture socioeconomic status and screening habits. Kaplan-Meier analysis and Cox proportional hazards models were utilized for survival analysis. RESULTS: We identified 46,970 patients (67% white, 7% black, 15% Hispanic, 10% Asian or Pacific Islander, and 1% unknown/other). Compared to white patients, black, Hispanic, and Asian or Pacific Islander patients were more likely to present with distant disease (3% vs 5%, 5%, and 6%, respectively; P < .001). After adjusting for sex, age, stage, subtype, tumor size, surgery, radiation, socioeconomics, and screening habits, black patients were the only race/ethnicity found to have increased odds of 5-year mortality compared to white patients (24%, P < .001). CONCLUSION: Thyroid cancer survival is worst for black patients regardless of socioeconomic status or screening habits. Racial/ethnic disparities in survival are not attributable to early detection alone.

Metastatic Acral lentiginous melanoma: A case report and review.

Of the four subtypes of cutaneous melanoma, acral lentiginous melanoma (ALM) is atypical in its presentation. ALM is a rare melanoma subtype that presents on the volar surfaces of the hand and foot. The difficulty of making an early diagnosis of ALM is highlighted by the case seen in our institution. The dire prognosis associated with ALM is postulated to be not only related to its destructive nature, but also due to a lack of patient awareness and vigilance, inadequate physician awareness, and disparity in healthcare access. We present this as a unique account of an ALM lesion in a 76 year old African-American male presenting originally in the left foot that went misdiagnosed for several years. The original lesion was considered to be an ulcerating left great toe lesion with signs typical of osteomyelitis. These clinical findings were corroborated by radiological x-ray evidence. Upon amputation and biopsy for suspected worsening osteomyelitis five years later, the pathological diagnosis of melanoma was finally made.

Strong association of fascin expression with triple negative breast cancer and basal-like phenotype in African-American women.

BACKGROUND: Fascin, an actin bundling protein, plays a critical role in cell motility due to formation of actin rich protrusions called filopodia, important in cell migration, invasion and metastatic spread. Fascin overexpression has been associated with epithelial to mesenchymal transition and correlates with progression and unfavourable prognosis in breast carcinoma. OBJECTIVE: To evaluate fascin expression by immunohistochemistry and correlate the expression pattern with clinicopathological parameters in breast cancer in African-American (AA) women, in whom triple negative breast cancer (TNBC), an aggressive subtype, is more prevalent. METHODS: Tissue microarrays were constructed from formalin-fixed, paraffin-embedded blocks of tumour tissue from primary breast carcinomas in 202 AA women. Immunohistochemical detection of fascin was correlated with four major subtypes of breast carcinoma (luminal A, luminal B, human epidermal growth factor receptor 2 and triple negative (TN)) and other clinicopathological factors, including age, grade, tumour size, stage, regional lymph node status and survival. RESULTS: We observed a significant association between fascin expression and TN subtype, oestrogen receptor (ER) negativity, progesterone receptor (PR) negativity, Elston-Nottingham (EN) grade 3 and decreased overall survival. There was also a significant association between expression of CK 5/6, a marker of basal-like phenotype, and fascin expression. CONCLUSION: These results suggest that fascin is a marker for TN subtype having a basal-like phenotype and decreased overall survival. Fascin may represent a target for therapy in TNBC in AA women.

T4b breast masses: a retrospective review of 12 cases presenting to a metropolitan tertiary care center.

INTRODUCTION: Due to increased awareness of breast cancer resulting in early detection, there is a decreased incidence nationwide of late-stage breast cancer, including that which presents with skin involvement (T4b). METHODS: A retrospective analysis of a 10-month period from August 2007 to May 2008 at Howard University Hospital (HUH), Washington, DC, revealed 12 patients diagnosed with T4b breast cancer and compared to similarly staged patients in the Surveillance, Epidemiology, and End Results (SEER) database. Finally, a logistic regression for the likelihood of T4b diagnosis was performed patients in the SEER database. RESULTS: HUH patients with T4b tumors were more likely than SEER patients to present with predictors of poor clinical outcome, including high-grade histology (100% vs 59.4%, p = .04) and estrogen receptor- (75% vs 30.3%, p = .001) and progesterone receptor- negative (91.7% vs 43.9%, p = .001) status. Conversely, HUH patients were younger (57.8 y vs 66.3 y, p = .03) and had smaller tumors (11.1 cm vs 28.2 cm, p = .02) than SEER patients with similarly staged tumors. Older patients (OR, 2.36; 95% CI, 1.50-2.00; p < .001; 60-80 y), African American patients (OR, 1.63; 95% CI, 1.26-2.11; p < .001), and patients with high-grade (OR, 5.51; 95% CI, 3.88-6.52; p < .001) tumors were more likely to be diagnosed with T4b tumors, whereas patients who lived in an area with increased median household income (OR, 0.99; 95% CI, 0.99-0.99; p = .001) were less likely to be diagnosed with a T4b lesion. CONCLUSION: While much research has focused on the socioeconomic causes for the development of T4b tumors, both patient and tumor biologic conditions cannot be eliminated as causative agents.

Early-stage gallbladder cancer in the Surveillance, Epidemiology, and End Results database: effect of extended surgical resection.

HYPOTHESIS: Extended surgical resection (ESR) may improve survival in patients with early-stage primary gallbladder cancer. DESIGN: Retrospective analysis of findings in the Surveillance, Epidemiology, and End Results (SEER) database. SETTING: Academic research. PATIENTS: Individuals with potentially surgically curable gallbladder cancer (Tis, T1, or T2) who underwent a surgical procedure. MAIN OUTCOME MEASURES: Overall survival, number of lymph nodes (LNs) excised, and results of simple cholecystectomy vs ESR. RESULTS: We identified 3209 patients with early-stage gallbladder cancer (11.7% Tis, 30.1% T1, and 58.2% T2). On multivariate analysis, decreased survival was noted among patients older than 60 years (hazard ratio, 1.57; 95% confidence interval, 1.30-1.90), among patients with more advanced cancer (1.99; 1.46-2.70 for T1; 3.29; 2.45-4.43 for T2), and among patients with disease-positive LNs (1.65; 1.39-1.95 for regional; 2.58; 1.54-4.34 for distant) (P < .001 for all), while increased survival was observed among female patients (0.82; 0.70-0.96; P = .02) and among patients undergoing ESR (0.59; 0.45-0.78; P < .001). The survival advantage of ESR was seen only in patients with T2 lesions (0.49; 0.35-0.68; P < .001). Lymph node excision data were available for a subset of 2507 patients, of whom 68.2% had no LN excised, 28.2% had 1 to 4 LNs excised, and 3.6% had 5 or more LNs excised. On multivariate analysis, patients with 1 to 4 LNs excised had a survival benefit over those with no LN excised (HR, 0.55; 95% CI, 0.46-0.66; P < .001), and patients with 5 or more LNs excised had a survival benefit over patients with 1 to 4 LNs removed (0.63; 0.40-0.96; P = .03). Lymph node excision improved survival in patients with T2 lesions (0.42; 0.33-0.53; P < .001 for patients with 1-4 LNs excised). CONCLUSION: Extended surgical resection, LN excision, or both may improve survival in certain patients with incidentally discovered gallbladder cancer.

Features associated with successful recruitment of diverse patients onto cancer clinical trials: report from the American College of Surgeons Oncology Group.

BACKGROUND: The clinical trials mechanism of standardized treatment and follow-up for cancer patients with similar stages and patterns of disease is the most powerful approach available for evaluating the efficacy of novel therapies, and clinical trial participation should protect against delivery of care variations associated with racial/ethnic identity and/or socioeconomic status. Unfortunately, disparities in clinical trial accrual persist, with African Americans (AA) and Hispanic/Latino Americans (HA) underrepresented in most studies. STUDY DESIGN: We evaluated the accrual patterns for 10 clinical trials conducted by the American College of Surgeons Oncology Group (ACOSOG) 1999-2009, and analyzed results by race/ethnicity as well as by study design. RESULTS: Eight of 10 protocols were successful in recruiting AA and/or HA participants; three of four randomized trials were successful. Features that were present among all of the successfully recruiting protocols were: (1) studies designed to recruit patients with regional or advanced-stage disease (2 of 2 protocols); and (2) studies that involved some investigational systemic therapy (3 of 3 protocols). DISCUSSION: AA and HA cancer patients can be successfully accrued onto randomized clinical trials, but study design affects recruitment patterns. Increased socioeconomic disadvantages observed within minority-ethnicity communities results in barriers to screening and more advanced cancer stage distribution. Improving cancer early detection is critical in the effort to eliminate outcome disparities but existing differences in disease burden results in diminished eligibility for early-stage cancer clinical trials among minority-ethnicity patients.

Pediatric trauma at an adult trauma center.

BACKGROUND: Accidental traumatic injury is the number 1 cause of morbidity and mortality in the pediatric population. In this study, we aim to prove that certain pediatric patients can be treated with good outcomes at an adult level 1 trauma center. METHODS: Retrospective analysis using the Howard University Hospital trauma registry identified 71 patients treated at Howard University Hospital between the ages of 1 and 17 years old. Specific variables were identified and collected for each patient. RESULTS: The majority of pediatric traumas treated at Howard University Hospital between June 2004 and May 2005 had high survival rates (93%). The patients who did not survive (7%) included 3 patients who were dead on arrival and 2 who died shortly after arrival to the hospital. CONCLUSIONS: Certain pediatric populations who present with minor and/or isolated injuries can be treated in an adult level 1 trauma center with similar outcomes to treatment in a pediatric level 1 trauma center.

The number of lymph nodes examined debate in colon cancer: how much is enough?

BACKGROUND: Much debate exists over the significance of the number of lymph nodes (LN) examined after colon resection. MATERIALS AND METHODS: The Surveillance, Epidemiology and End Results (SEER) database was queried for patients who presented with colonic adenocarcinoma. Multiple Cox proportional hazard regressions were run using successive LN cut-offs (6-26), first controlling for and then stratifying by T-stage. This was repeated in subsets of patients delineated by LN status. Additional variables controlled for in every regression were age, gender, ethnicity, marital status, number of positive LN, grade, metastases, and extent of surgery. After each regression, a Harrell's C statistic and an Akaike's information criterion (AIC) were performed to test the predictive capacity and fit of the model, respectively. RESULTS: 128,071 patients met selection criteria. The highest Harrell's C statistics among all patients were the cutoffs at 14 LN and 15 LN. Between those, the AIC shows that the cutoff at 15 LN fit the data more closely than the 14 LN cutoff. The models with the best predictive ability and best fit by T-stage were T1, 14 LN; T2, 10 LN; T3, 10 LN; T4, 12 LN. CONCLUSIONS: Using a population-based dataset, we show the optimal number of LN examined is dependent upon the patient's tumor stage. Across all T-stages, the highest optimal number of LN resected was 15. Since it is possible to estimate but not perfectly predict the stage of a patient's tumor preoperatively, we believe the recommendation should be based on the most conservative measure.

Surgical treatment for women with breast cancer: do randomized clinical trials represent current medical practices?

Randomized clinical trials have not shown survival differences between breast cancer patients who undergo breast-conserving surgery and those who undergo modified radical mastectomy (MRM). Recent studies however, have suggested that these randomized clinical trials findings may not be representative of the entire population or the nature of current patient care. A retrospective analysis of female invasive breast cancer patients who underwent surgery in the Surveillance, Epidemiology, and End Results database (1990-2003) was performed. Survival was compared amongst women who underwent partial mastectomy, partial mastectomy plus radiation (PMR), or MRM. Cox proportional hazards regressions were used to investigate the impact of method of treatment upon survival, after adjusting for patient and tumor characteristics. A total of 218,043 patients, mean age 62 years, were identified. MRM accounted for 51.5 per cent of the study population whereas PMR accounted for 34.9 per cent. On multivariate analyses, significant improvement was observed in patient survival associated with PMR when compared with MRM patients (hazard ratio = 0.71, 95% confidence interval = 0.67-0.74, P < 0.001). This population-based study suggests that there is a survival benefit for women undergoing PMR in the treatment of breast cancer.

Disparity in limb-salvage surgery among sarcoma patients.

BACKGROUND: Recent studies have shown that aggressive preoperative radiation increases the likelihood of limb salvage in sarcoma patients. METHOD: The Surveillance, Epidemiology and End Results database was used to run an adjusted logistic regression for the receipt of cancer-directed treatment modalities. RESULTS: Of patients with specific surgical procedures recorded (n = 2,104), 86.0% had undergone a limb-sparing procedure. On bivariate analysis, African American patients were less likely to receive a limb-sparing procedure than white patients (80.4% vs 86.9%; P = .02). On multivariate analysis, African Americans were significantly more likely to receive preoperative radiation (odds ratio [OR], 2.31; 95% confidence interval [CI], 1.22-4.40; P = .011), yet this did not translate into an increase in limb salvage (OR, .67; 95% CI, .42-1.08; P = .10). Limb salvage significantly increased for all groups in 2001 and after (OR, 2.75; 95% CI, 1.55-4.88; P = .001) without a decrease in survival. For those with tumors greater than 4 cm, there was a trend away from limb salvage for African Americans (OR, .59; 95% CI, .32-1.07; P = .08). CONCLUSIONS: Our results of an increase in limb-salvage surgeries after 2001 without a decrease in survival support previous studies. The trend away from limb salvage for African Americans cannot be answered by this study.

Predictors for survival of penetrating trauma using emergency department thoracotomy in an urban trauma center: the Cardiac Instability Score.

BACKGROUND: Emergency department thoracotomy (EDT) is a procedure used in an attempt to save lives of patients in extremis. This study aims to determine predictors of survival and futility by proposing a scoring scale that measures cardiac instability and its use in predicting survival of victims of penetrating trauma undergoing EDT. METHODS: This retrospective study analyzes patients who underwent EDT during a 45-month period at Howard University Hospital, Washington, DC. Vital signs and Glasgow Coma scale (GCS) scores were analyzed at the scene and in the emergency department. A cardiac instability score (CIS) was devised to assign values to vital signs, and the GCS was based on scores from the emergency department. RESULTS: Emergency department vital signs, female gender, absence of cardiopulmonary resuscitation (CPR), and high CIS were found to be statistically significant predictors of survival. CONCLUSIONS: The CIS correlated with survival of patients who underwent EDT and was found to be statistically significant in determining the outcome of an EDT.

Academic needs in developing countries: a survey of the West African College of Surgeons.

BACKGROUND: The inaugural Fundamentals of Surgical Research Course was held in Sierra Leone in conjunction with the West African College of Surgeons (WACS). We subsequently performed a formal assessment of the academic needs of West African surgeons to plan for future courses, and hypothesized that they would differ from the goals of the U.S. course. METHODS: A survey was distributed via email to members of the WACS and returned by the same mechanism. It consisted of 6 questions addressing specific elements of the inaugural course, and potential new topics for future courses. RESULTS: Over half (53%, 25/47) of the respondents had not attended the inaugural course, while 85% (40/47) planned on attending the next course. Respondents identified least useful topics from the initial course as "Molecular Biology: Tools of the Trade" (45%, 21/47) and "Getting Promoted" (23%, 11/47). The least popular potential new topics were "Use and Abuse of Administrative Databases" (9%, 4/47), "Animal Models" (21%, 10/47), and "Genomics and Proteomics" (21%, 10/47). CONCLUSIONS: The self-reported academic needs of West African surgeons are oriented toward clinical research. Basic and translational research topics are of secondary interest to the majority of respondents. Future courses in this region must address specific local needs.

Clinical significance of p53 and bcl-2 protein coexpression phenotypes in molecular breast cancer subtypes of pre-menopausal and post-menopausal African-American women.

With the current classification of breast carcinoma into molecular subtypes with distinct prognosis and response to therapy, we sort to assess the clinical significance of p53 and bcl-2 coexpression phenotypes in invasive breast tumors and correlate this to the different molecular breast cancer subtypes in African-American women. We performed a retrospective analysis of data on p53 and bcl-2 expression. Results were correlated to molecular breast cancer subtypes, and clinicopathologic variables of prognostic significance. Our study sample included all African-American women diagnosed with breast cancer from 1998 to 2005. Twenty-seven (27.6%) per cent of cases in our study sample over-expressed p53, whereas 69.3 per cent over-expressed bcl-2 protein. A significant inverse correlation was observed between expression of p53 and bcl-2. Combined analysis of p53 and bcl-2 showed that 53.2 per cent of the tumors displayed p53(-)bcl-2(+) phenotype which was significantly associated with the luminal A subtype, whereas 11.6 per cent displayed the p53(+)bcl-2(-) phenotype which was significantly associated with the basal cell-like and Her-2/neu. Neither p53 expression nor bcl-2 expression individually or in combination were of independent prognostic significance. p53(+)bcl-2(-) phenotype is significantly correlated with the basal cell-like subtype and may be associated with the biologic aggressiveness of this cohort of molecular breast cancer.

Breast cancer risk assessments comparing Gail and CARE models in African-American women.

The Gail model has been used to predict invasive breast cancer risk in women using risk factors of age, age at menarche, age at first live birth, number of first-degree relatives with breast cancer, and number of previous benign breast biopsies. However, this model underestimates breast cancer risk in African-American women. The Contraceptive and Reproductive Experience (CARE) model has been developed to replace the Gail model in predicting breast cancer risk in African-American women. In a sample of 883 women who participated in the breast cancer screening program at Howard University Cancer Center, we compared the breast cancer risk estimates from the Gail model and the CARE model. The mean 5-year breast cancer risk was 0.88% (Range: 0.18-6.60%) for the Gail model and 1.29% (Range: 0.20-4.50%) for the CARE model. Using the usual cutoff-point of 1.67% or above for elevated risk, there is a significant difference in the proportion of women with elevated breast cancer risk between the Gail and the CARE models (McNemar's test, p < 0.0001). For both models, there was a significant mean risk difference between those with and without a family history of breast cancer (Wilcoxon rank-sum test, p < 0.0001). Our results confirm the need for validation of the Gail model in African-Americans and diversity in research. Although these findings are not perfect and perhaps not definitive, they are additive in the discussions during counseling and risk assessment in African-Americans. Furthermore, these findings will be complemented by new technologies such as genomics in refining our ability to assess risk.

Trends in clinicopathologic characteristics and prognostic predictors of survival outcome in black patients with gastric carcinoma: a single institution's experience.

BACKGROUND: Age, gender, and ethnic group-related differences influence the outcome of gastric cancer. Our aim was to analyze the trends and association of clinicopathologic characteristics and prognostic factors of gastric cancer in black patients over a period of 28 y. METHODS: A retrospective analysis of all black patients treated for gastric cancer from 1979 to 2007 at Howard University Teaching Hospital. This period was divided into two time frames, 1979-1993 and 1994-2007. RESULTS: Of 286 patients in our study, there were 160 (55.9%) males versus 126 (44.1%) females. For the period 1979-1993, there were a total of 169 (59.1%) patients versus 117 (40.9%) for 1994-2007. A significant increase in the incidence of cardia/fundus tumors and stage IV tumors was noted between the two periods (P<0.02, P<0.004), 8.9% versus 12% and 71.4% versus 50.8%. The median survival time for the period 1979-1993 was 30.5 mo versus 39.2 mo for 1994-2007. The median survival time for males was 35.7 mo versus 34.9 mo for females. Significant independent predictors of a shorter gastric cancer-specific survival include tumor stage IV (HR 8.4 95% CI 2.0-35.0, P<0.003), female gender (HR 2.3 95% CI 1.0-4.9, P<0.02). CONCLUSION: Increased incidence of cardia/fundus tumors and stage IV disease may contribute to the sustained higher gastric cancer-specific mortality observed amongst black patients. Female gender emerged as an independent predictor of a shorter survival time.

Treatment and survival outcome for molecular breast cancer subtypes in black women.

OBJECTIVE: To analyze whether the local-regional surgical treatments (breast-conserving therapy, mastectomy) resulted in different overall survival, distant metastasis-free survival, and locoregional recurrence-free survival rates for the various molecular breast cancer subtypes. SUMMARY BACKGROUND DATA: Molecular gene expression profiling has been proposed as a new classification and prognostication system for breast cancer. Current recommendation for local-regional treatment of breast cancer is based on traditional clinicopathologic variables. METHODS: Retrospective analysis of 372 breast cancer cases with assessable immunohistochemical data for ER, PR, and Her-2/neu receptor status, diagnosed from 1998 to 2005. Molecular subtypes analyzed were luminal A, luminal B, basal like, and Her-2/neu. RESULTS: No substantial difference was noted in overall survival, and locoregional recurrence rate between the local-regional treatment modalities as a function of the molecular breast cancer subtypes. The basal cell-like subtype was an independent predictor of a poorer overall survival (hazard ratio [HR] = 2.52, 95% confidence interval [CI] 1.28-4.97, P < 0.01) and a shorter distant metastasis-free survival time (HR = 3.61, 95% CI 1.27-10.2, P < 0.01), and showed a tendency toward statistical significance as an independent predictor of locoregional recurrence (HR = 3.57, 95% CI 0.93-13.6, P = 0.06). CONCLUSIONS: The basal cell-like subtype is associated with a worse prognosis, a higher incidence of distant metastasis, and may be more prone to local recurrence when managed with breast-conserving therapy.

Basal cell-like (triple-negative) breast cancer, a predictor of distant metastasis in African American women.

BACKGROUND: The aim of this study was to evaluate the prognostic significance of the basal cell-like molecular breast cancer subtype with respect to locoregional recurrence and distant metastasis in African American women treated for breast cancer. METHODS: A retrospective analysis was performed of the tumor registry database for all African American women diagnosed and treated for breast cancer from 1998 to 2005 who had assessable data for all 3 markers: estrogen, progesterone, and Her-2/neu. RESULTS: A total of 372 patients were included in our study sample. Of these, 22 (6.1%) had locoregional recurrence, 35 (9.8%) had distant metastasis, and 301 (84.1%) had no evidence of breast tumor recurrence. The median follow-up time was 36 months. Compared with the other molecular subtypes the basal cell-like subtype showed a statistically significant association to distant metastasis: 15 (42.9%) vs 13 (37.1%), 4 (11.4%), and 3 (8.6%) (P < .001), respectively, for luminal A, Her-2/neu, and luminal B subtypes. The basal cell-like subtype was an independent predictor of distant metastasis (odds ratio, 5.8; 95% confidence interval, 1.5-22.0, P = .009). The molecular subtypes showed no statistically significant difference with respect to locoregional treatment administered and tumor stage at time of diagnosis. CONCLUSIONS: The basal cell-like molecular breast cancer subtype is an independent predictor of distant metastasis in African American women.

Molecular breast cancer subtypes in premenopausal and postmenopausal African-American women: age-specific prevalence and survival.

BACKGROUND: Breast cancer is currently regarded as a heterogeneous disease classified into various molecular subtypes using gene expression analysis. These molecular subtypes include: basal cell-like, Her-2/neu, luminal A, and luminal B. OBJECTIVES: To analyze the prevalence and clinicopathologic associations for molecular breast cancer subtypes in premenopausal and postmenopausal African-American women. DESIGN: A retrospective analysis of all African-American women diagnosed with breast cancer from 1998 to 2005, who had assessable data for ER, PR, and Her-2/neu status. Molecular subtype classification was done based on immunohistochemical surrogates for ER, PR, and Her-2/neu status obtained from Howard University tumor registry for each patient. The molecular subtypes were defined as: luminal A (ER+ and/or PR+, HER2-), luminal B (ER+ and/or PR+, HER2+), basal-like (ER-, PR-, HER2-), and Her-2/neu (ER-, PR-, and HER2+). OUTCOME MEASURES: We analyzed the prevalence of molecular breast cancer subtypes in a population of African-American women and determined their associations with patient demographics and clinicopathologic variables: node status, tumor size, histological grade, p53 mutation status, and breast cancer-specific survival. RESULTS: The luminal A subtype was the most prevalent in our study sample (55.4%) compared with (11.8%) luminal B, (21.2%) basal cell-like, and (11.6%) Her-2/neu subtypes. The molecular subtypes did not differ by menopausal status. However, when stratified into age-specific groups, the basal cell-like subtype (57.1%) was the most prevalent in the age group <35 y compared with luminal A, luminal B, and Her-2/neu subtypes at 25.0%, 14.3%, and 3.6%, respectively. The basal cell-like subtype also showed an age-specific bimodal distribution with a peak in the <35 y and 51 to 65 y age groups. The basal cell-like and the Her-2/neu subtypes showed an increased association with clinicopathologic variables portending a more aggressive clinical course when compared with luminal A subtype. A paradoxical inverse relationship between the expression of p53 and Bcl-2 protooncoprotein was noted in the molecular subtypes. Breast cancer-specific survival differed significantly among the molecular subtypes (P < 0.04), with the basal cell-like and Her-2/neu subtypes having the poorest outcome. CONCLUSIONS: The high prevalence of the basal cell-like subtype in the young premenopausal African-American women aged <35 y could be a contributory factor to the poorer prognosis of breast cancer observed in this cohort of patients.