Connecting Through Dance: Understanding Conscious Clubbing Event Experiences.

Individuals abstaining from alcohol consumption frequently find themselves in contexts encouraging consumption, with limited alternative social interaction opportunities. Conscious clubbing events exclude alcohol and drugs, possibly providing valuable social connections, but little is known about event benefits. Twelve conscious clubbing event attendees and facilitators aged 25-55 from across Europe participated in semi-structured photo-elicitation interviews, which were analysed using thematic analysis. Findings suggested that conscious clubbing appears to enhance health, healing and growth, aiding recovery from substance dependency and trauma. Positioned as a modern ritual, symbolic and ritualistic preparations and experiences promoted storytelling and self-discovery. Connecting through synchronised but unchoreographed movement, participants engaged in powerful journeys and transformative experiences detached from life constraints. Inclusive digital and face-to-face conscious clubbing communities provided a sense of meaning and belonging away from substance use pressures and harms, particularly for those marginalised within society. Findings provide important and in-depth insights, including novel harm prevention implications. Future work should consider participatory barriers, event sustainability and misconceptions to increase event availability and participation.

Delapré Walk project: Are signposted walking routes an effective intervention to increase engagement in urban parks? -Natural experimental study.

Spatial education interventions in the built environment may increase engagement with urban greenspace. This research was a natural experimental study with mixed-method evaluation and repeated cross-sectional design. Twenty-four directional wayfinding signs were installed within an urban park to create a 3 km signposted walking route through the park's amenities in a clockwise direction. Manual counts on one path and bi-directional automated active infrared counts on six paths along the intervention route were conducted at baseline and 12-month follow-up. A QR code accessed intercept survey was open throughout the follow-up phase to capture user experiences, views, and attitudes toward the intervention. There was no consistent difference in manual counts at baseline or 12-month follow-up between intervention and control parks. Automated counts showed no consistent significant change in clockwise footfall between baseline (median automated count range across six counters: 10-130 clockwise counts per day) and follow-up (Autumn to Winter follow-up median automated count range across six counters: 13-103 clockwise counts per day; Spring to Summer follow-up median automated count range across six counters: 13-124 clockwise counts per day). However, 23% (11 out of 48 people) of clockwise travelling route users reported they were following the signs at 12-month follow-up. Intercept survey respondents (n = 27) appeared to be infrequent park users (number of respondents for 'my first visit': 7, and 'one to two times per month: 9), with the new signs making them feel less anxious about exploring unfamiliar areas, while motivating them to walk further than originally planned and helping them to 'take notice' of the landscape. Directional wayfinding for recreational walking appears to help infrequent users engage with urban greenspace.

Attitudes toward veganism in eating disorder professionals.

AIMS AND METHOD: Veganism has increased in popularity in the past decade and, despite being a characteristic protected by law, is often viewed negatively by the general population. Little is known about the attitudes of healthcare professionals despite the potential influence on practice and eating disorder patient care. This is one of the first studies to investigate attitudes toward veganism within specialist eating disorder, general mental health and other professionals. RESULTS: A one-way ANOVA indicated all professionals held positive views toward veganism. General mental health professionals held statistically more positive veganism attitudes than specialist eating disorder and other professionals. CLINICAL IMPLICATIONS: As one of the first studies to suggest eating disorder professionals are not biased against veganism, it has important clinical practice implications, particularly when exploring motivations for adopting a vegan diet (health, weight loss, environmental or animal welfare concerns) in patients with eating disorders. Implications for further research are provided.

Improvement in DCIS detection rates by MRI over time in a high-risk breast screening study.

Although magnetic resonance imaging (MRI) is much more sensitive than mammography for detecting early invasive breast cancer, in many high-risk screening studies MRI was less sensitive than mammography for detecting ductal carcinoma in situ (DCIS). We reviewed our experience detecting DCIS in our single center study of annual MRI, mammography, ultrasound and clinical breast examination (CBE) for screening very high-risk women. All cases of DCIS±microinvasion and invasive cancer were compared in two time frames: before (period A) and after (period B) July 2001-when we acquired expertise in the detection of DCIS with MRI-with respect to patient demographics, method of detection, and rates of detection of invasive cancer and DCIS. In period A there were 15 cases (3.1% of 486 screens) in 223 women, of which 2 (13%) were DCIS-one with microinvasion-neither detected by MRI. In period B there were 29 cases (3.3% of 877 screens) in 391 women, of which 10 (34%) were DCIS±microinvasion (p=0.04), all 10 detected by MRI but only one by mammography. No DCIS cases were detected by ultrasound or CBE. Specificity was lower in period B than in period A but acceptable. The ability to detect DCIS with screening MRI improves significantly with experience. MRI-guided biopsy capability is essential for a high-risk screening program. In experienced centers the increased sensitivity of MRI relative to mammography is at least as high for DCIS as it is for invasive breast cancer.

Breast Cancer Mortality among Women with a BRCA1 or BRCA2 Mutation in a Magnetic Resonance Imaging Plus Mammography Screening Program.

Annual breast magnetic resonance imaging (MRI) plus mammography is the standard of care for screening women with inherited BRCA1/2 mutations. However, long-term breast cancer-related mortality with screening is unknown. Between 1997 and June 2011, 489 previously unaffected BRCA1/2 mutation carriers aged 25 to 65 years were screened with annual MRI plus mammography on our study. Thereafter, participants were eligible to continue MRI screening through the high-risk Ontario Breast Screening Program. In 2019, our data were linked to the Ontario Cancer Registry of Cancer Care Ontario to identify all incident cancers, vital status and causes of death. Observed breast cancer mortality was compared to expected mortality for age-matched women in the general population. There were 91 women diagnosed with breast cancer (72 invasive and 19 ductal carcinoma in situ (DCIS)) with median follow-up 7.4 (range: 0.1 to 19.2) years. Four deaths from breast cancer were observed, compared to 2.0 deaths expected (standardized mortality ratio (SMR) 2.0, p = 0.14). For the 489 women in the study, the probability of not dying of breast cancer at 20 years from the date of the first MRI was 98.2%. Annual screening with MRI plus mammography is a reasonable option for women who decline or defer risk-reducing mastectomy.

Is mammography adequate for screening women with inherited BRCA mutations and low breast density?

BACKGROUND: Several observational studies have shown that magnetic resonance imaging (MRI) is significantly more sensitive than mammography for screening women over age 25 at high risk for hereditary breast cancer; however, MRI is more costly and less specific than mammography. We sought to determine the extent to which the low sensitivity of mammography is due to greater breast density. METHODS: Breast density was evaluated for all patients on a high-risk screening study who were diagnosed with breast cancer between November 1997 and July 2006. Density was measured in two ways: qualitatively using the four categories characterized by the Breast Imaging Reporting and Data System and quantitatively using a computer-aided technique and classified as (a) 50% density. Comparison of sensitivity of mammography (and MRI) for each individual density category and after combining the highest two and lowest two density categories was done using Fisher's exact test. RESULTS: A total of 46 breast cancers [15 ductal carcinoma in situ (DCIS) and 31 invasive] were diagnosed in 45 women (42 with BRCA mutations). Mean age was 48.3 (range, 32-68) years. Overall, sensitivity of mammography versus MRI was 20% versus 87% for DCIS and 26% versus 90% for invasive cancer. There was a trend towards greater mammographic sensitivity for invasive cancer in women with fattier breasts compared with those with greater breast density (37-43% versus 8-12%; P = 0.1), but this trend was not seen for DCIS. CONCLUSION: It is necessary to add MRI to mammography for screening women with BRCA mutations even if their breast density is low.

BRCA1 mutation and young age predict fast breast cancer growth in the Dutch, United Kingdom, and Canadian magnetic resonance imaging screening trials.

PURPOSE: Magnetic resonance imaging (MRI) screening enables early detection of breast cancers in women with an inherited predisposition. Interval cancers occurred in women with a BRCA1 mutation, possibly due to fast tumor growth. We investigated the effect of a BRCA1 or BRCA2 mutation and age on the growth rate of breast cancers, as this may influence the optimal screening frequency. EXPERIMENTAL DESIGN: We reviewed the invasive cancers from the United Kingdom, Dutch, and Canadian MRI screening trials for women at hereditary risk, measuring tumor size at diagnosis and on preceding MRI and/or mammography. We could assess tumor volume doubling time (DT) in 100 cancers. RESULTS: Tumor DT was estimated for 43 women with a BRCA1 mutation, 16 women with a BRCA2 mutation, and 41 women at high risk without an identified mutation. Growth rate slowed continuously with increasing age (P = 0.004). Growth was twice as fast in BRCA1 (P = 0.003) or BRCA2 (P = 0.03) patients as in high-risk patients of the same age. The mean DT for women with BRCA1/2 mutations diagnosed at ages < or =40, 41 to 50, and >50 years was 28, 68, and 81 days, respectively, and 83, 121, and 173 days, respectively, in the high-risk group. Pathologic tumor size decreased with increasing age (P = 0.001). Median size was 15 mm for patients ages < or =40 years compared with 9 mm in older patients (P = 0.003); tumors were largest in young women with BRCA1 mutations. CONCLUSION: Tumors grow quickly in women with BRCA1 mutations and in young women. Age and risk group should be taken into account in screening protocols.

Injuries to the head and face in women's collegiate field hockey.

OBJECTIVE: To investigate the incidence and severity of head and facial injuries in female collegiate field hockey players. DESIGN: Prospective, survey-based study. SETTING AND PARTICIPANTS: Certified athletic trainers and athletes at 6 Division I institutions. INTERVENTIONS/ASSESSMENT OF RISK FACTORS: Head and facial injuries were documented during practices and games during 2 women's field hockey seasons. MAIN OUTCOME MEASUREMENTS: The total number of incidents that resulted in a head or facial injury, the total number of head and facial injuries, the injury type, location, and source, and the amount of time the injured athlete lost from play. When the injury occurred, either in a game or practice, was documented in year 2. RESULTS: A total of 253 student-athlete seasons (each season that a player competed was considered 1 student-athlete season) were completed. A total of 57 incidents occurred with 62 head and facial injuries reported (5 incidents yielded 2 injuries each). Most injuries were due to contact with the ball (56%); the majority of injuries were lacerations (32%). A relatively high number of facial fractures were reported (13%). Sixty-five percent of the injuries resulted in less than 1-day time loss and would not have been reportable in many traditional injury surveillance systems. CONCLUSIONS: The high number and rate of serious or potentially serious injuries occurring to the head and face in female collegiate field hockey players is a concern. Prevention measures, including better protective equipment for the head and face, may help reduce future head and facial injuries in these athletes.

Breast cancers detected with imaging screening in the BRCA population: emphasis on MR imaging with histopathologic correlation.

The benefit of screening with breast magnetic resonance (MR) imaging for certain patient populations at high risk for breast cancer, most notably patients with a genetic mutation in the BRCA1 or BRCA2 gene, has been established in numerous studies and is now becoming part of routine clinical practice. Despite the lower sensitivity of mammography compared with that of MR imaging, the former remains the standard of care for screening any patient population. In the BRCA1 and BRCA2 populations, the inferior sensitivity and specificity of ultrasonography (US) limit its role as a screening tool, but US remains a vital diagnostic tool because of its ability to provide guidance for biopsy of many suspicious lesions detected with MR imaging. Important features of a screening program with breast MR imaging include the following: optimization of the MR imaging technique, an awareness of the imaging features of invasive and noninvasive breast cancers detected with MR imaging, an understanding of the limitations of the various imaging modalities in both the initial screening and subsequent diagnostic work-up evaluations, and the requirement for MR imaging-guided biopsy.

Surveillance of BRCA1 and BRCA2 mutation carriers with magnetic resonance imaging, ultrasound, mammography, and clinical breast examination.

CONTEXT: Current recommendations for women who have a BRCA1 or BRCA2 mutation are to undergo breast surveillance from age 25 years onward with mammography annually and clinical breast examination (CBE) every 6 months; however, many tumors are detected at a relatively advanced stage. Magnetic resonance imaging (MRI) and ultrasound may improve the ability to detect breast cancer at an early stage. OBJECTIVE: To compare the sensitivity and specificity of 4 methods of breast cancer surveillance (mammography, ultrasound, MRI, and CBE) in women with hereditary susceptibility to breast cancer due to a BRCA1 or BRCA2 mutation. DESIGN, SETTING, AND PARTICIPANTS: A surveillance study of 236 Canadian women aged 25 to 65 years with BRCA1 or BRCA2 mutations who underwent 1 to 3 annual screening examinations, consisting of MRI, mammography, and ultrasound at a single tertiary care teaching hospital between November 3, 1997, and March 31, 2003. On the day of imaging and at 6-month intervals, CBE was performed. MAIN OUTCOME MEASURES: Sensitivity and specificity of each of the 4 surveillance modalities, and sensitivity of all 4 screening modalities vs mammography and CBE. RESULTS: Each imaging modality was read independently by a radiologist and scored on a 5-point Breast Imaging Reporting and Data System scale. All lesions with a score of 4 or 5 (suspicious or highly suspicious for malignancy) were biopsied. There were 22 cancers detected (16 invasive and 6 ductal carcinoma in situ). Of these, 17 (77%) were detected by MRI vs 8 (36%) by mammography, 7 (33%) by ultrasound, and 2 (9.1%) by CBE. The sensitivity and specificity (based on biopsy rates) were 77% and 95.4% for MRI, 36% and 99.8% for mammography, 33% and 96% for ultrasound, and 9.1% and 99.3% for CBE, respectively. There was 1 interval cancer. All 4 screening modalities combined had a sensitivity of 95% vs 45% for mammography and CBE combined. CONCLUSIONS: In BRCA1 and BRCA2 mutation carriers, MRI is more sensitive for detecting breast cancers than mammography, ultrasound, or CBE alone. Whether surveillance regimens that include MRI will reduce mortality from breast cancer in high-risk women requires further investigation.

The relationship between internalized stigma, negative symptoms and social functioning in schizophrenia: the mediating role of self-efficacy.

The broad aim of the present study was to gain a greater understanding of the processes that contribute to negative symptoms and social functioning in schizophrenia. More specifically, a theoretical model was proposed predicting that self-efficacy would mediate the relationship between internalized stigma and both negative symptoms and social functioning in schizophrenia. Initial analyses revealed that all variables were correlated. Specifically, internalized stigma was strongly correlated with negative symptoms, social functioning and self-efficacy. Furthermore, self-efficacy was strongly related to negative symptoms and moderately associated with social functioning. Further analyses however did not support the mediational role of self-efficacy. The theoretical and clinical implications of the findings, together with recommendations for future research, are outlined.

Experience of young women diagnosed with breast cancer who undergo fertility preservation consultation.

BACKGROUND: Fertility preservation (FP) is of increasing concern to young patients with breast cancer. The American Society of Clinical Oncology has recommended referral to a reproductive specialist as early as possible before beginning systemic adjuvant therapy. AIM: To gather information from young patients with breast cancer about their experiences with FP referral, consultation, and decision making. METHODS: An anonymous questionnaire was mailed to consecutive patients with breast cancer who were referred, from January 2005 to January 2010, from our center to the CReATe fertility clinic. Topics included demographics; cancer stage and treatment; previous fertility problems; referral source and timing; options presented and chosen; and satisfaction with the referral, consultation, and decision-making processes. RESULTS: Of the 53 women identified, 27 (51%) participated. The mean age was 31 years (range, 24-41 years). Fifteen (56%) women opted for embryo or oocyte cryopreservation, 2 for ovarian suppression, and 10 for no FP. The choice was not affected by disease stage or by already having a child. Of the 22 women who responded, 14 (64%) were satisfied or very satisfied overall. Eighteen out of 23 (78%) respondents felt that the right amount of information was given. Thirty-nine percent had difficulty with decision making, but only 1 (4%) woman indicated that cost was a deciding factor. A common theme among respondents was inadequate time for decision making. A common complaint was the lack of written material before and/or after their consultation. Sixty-three percent expressed an interest in meeting with a psychosocial counselor. CONCLUSIONS: (1) FP referral should be initiated by the surgeon as soon as a diagnosis of invasive cancer is made, (2) women need written materials before and after FP consultation is needed, and (3) a FP counselor who is able to spend additional time after the consultation could help with decision making.

Reasons for risk-reducing mastectomy versus MRI-screening in a cohort of women at high hereditary risk of breast cancer.

OBJECTIVE: To determine the reasons that motivate women in a cohort of women under intensive surveillance for breast cancer to undergo risk-reducing mastectomy (RRM). PATIENTS AND METHODS: Women with a BRCA1 or BRCA2 mutation who were enrolled in an MRI-based breast screening study were eligible to participate in this survey. A self-administered questionnaire was given to women who did, and who did not terminate annual MRI-based surveillance in order to undergo RRM. The questionnaire included information on family history, risk perception and satisfaction with screening. In addition, women were asked to provide the principal reason for their choice of having preventive surgery or not, and were asked about their satisfaction with this choice. RESULTS: 246 women without breast cancer participated in the study. Of these, 39 women (16%) elected to have RRM at some point after initiating screening. Although women who had a mother or sister with breast cancer were more likely to opt for RRM than were women with no affected first-degree relative (21% versus 10%) this did not reach statistical significance. Women who perceived their breast cancer risk to be greater than 50% were more likely to opt for RRM than were women who estimated their risk to be less than 50% (19% versus 6%). Fear of cancer was the most common reason cited for choosing to have RRM (38% of respondents) followed by having had a previous cancer, (25%), then concern over their children (16%). CONCLUSION: Among women with a BRCA mutation who are enrolled in an MRI-based screening program, a high perception of personal breast cancer risk and a history of breast cancer in a first-degree relative are predictors of the decision to have RRM.

Psychological impact of recall on women with BRCA mutations undergoing MRI surveillance.

OBJECTIVE: The addition of magnetic resonance imaging (MRI) to mammography for surveillance of women with BRCA mutations significantly increases sensitivity but lowers specificity. This study aimed to examine whether MRI surveillance, and particularly recall, is associated with increased anxiety, depression, or breast cancer worry/distress. METHODS: Women with BRCA mutations in an MRI surveillance study were invited to complete: Hospital Anxiety and Depression Scale (HADS), Lerman's Breast Cancer Worry Scale, Breast Cancer Worry Interference Scale, and a quality of life rating at 3 time points: 1-2 weeks before (T1), 4-6 weeks after (T2) and 6 months after their annual surveillance (T3). Repeated measures analyses were performed over the 3 time points for recalled and non-recalled women. RESULTS: 55 women (30 BRCA1, 25 BRCA2) completed study instruments at T1 and T2, and 48 at T3. Eighteen women (32%) were recalled for additional imaging. At T1, 27 women (49%) were above HADS threshold for "possible cases" for anxiety (score≥8). Recalled (but not non-recalled) women had a significant increase of HADS anxiety at T2 which dropped to below baseline by T3. No group differences were observed in terms of change over time in other quantitative psychological measures. CONCLUSIONS: While breast MRI surveillance did not have a detrimental psychological impact on women with a BRCA1 or BRCA2 mutation, recalling these very high-risk women for further imaging after a false positive MRI scan temporarily increased their global anxiety.

Prospective study of breast cancer incidence in women with a BRCA1 or BRCA2 mutation under surveillance with and without magnetic resonance imaging.

PURPOSE: The sensitivity of magnetic resonance imaging (MRI) for breast cancer screening exceeds that of mammography. If MRI screening reduces mortality in women with a BRCA1 or BRCA2 mutation, it is expected that the incidence of advanced-stage breast cancers should be reduced in women undergoing MRI screening compared with those undergoing conventional screening. PATIENTS AND METHODS: We followed 1,275 women with a BRCA1 or BRCA2 mutation for a mean of 3.2 years. In total, 445 women were enrolled in an MRI screening trial in Toronto, Ontario, Canada, and 830 were in the comparison group. The cumulative incidences of ductal carcinoma in situ (DCIS), early-stage, and late-stage breast cancers were estimated at 6 years in the cohorts. RESULTS: There were 41 cases of breast cancer in the MRI-screened cohort (9.2%) and 76 cases in the comparison group (9.2%). The cumulative incidence of DCIS or stage I breast cancer at 6 years was 13.8% (95% CI, 9.1% to 18.5%) in the MRI-screened cohort and 7.2% (95% CI, 4.5% to 9.9%) in the comparison group (P = .01). The cumulative incidence of stages II to IV breast cancers was 1.9% (95% CI, 0.2% to 3.7%) in the MRI-screened cohort and 6.6% (95% CI, 3.8% to 9.3%) in the comparison group (P = .02). The adjusted hazard ratio for the development of stages II to IV breast cancer associated with MRI screening was 0.30 (95% CI, 0.12 to 0.72; P = .008). CONCLUSION: Annual surveillance with MRI is associated with a significant reduction in the incidence of advanced-stage breast cancer in BRCA1 and BRCA2 carriers.

Is mammographic breast density a breast cancer risk factor in women with BRCA mutations?

PURPOSE: Increased mammographic breast density is well recognized as a breast cancer risk factor in the general population. However, it is unclear whether it is a risk factor in women with BRCA mutations. We present the results of a nested case-control screening study investigating the relationship between breast density and breast cancer incidence in this population. PATIENTS AND METHODS: Women ages 25 to 65 years with known BRCA mutations were enrolled onto a single-center, high-risk breast cancer screening program. Using a computer-aided technique (Cumulus), quantitative percentage density (PD) was measured for each participant on her baseline mammogram by a single, blinded observer. RESULTS: Between November 1997 and March 2008, 462 women (mean age, 44 years; 245 BRCA1 and 217 BRCA2) were screened and 50 breast cancers were diagnosed (38 invasive, 12 ductal carcinoma in situ [DCIS]). Density was not measured in 40 women of whom four developed cancer (three invasive, one DCIS). Mean PD (+/- standard deviation [SD]) for 376 women who did not develop breast cancer was 34% (23) compared with 31% (21) for 46 women with cancer (P = .51). Logistic regression model of breast cancer incidence and PD revealed an odds ratio of 0.99 (+/- 0.01 SD) for a one-unit increase in PD (P = .44). Results remained nonsignificant in multivariate analysis, as well as when women with pure DCIS were excluded. CONCLUSION: Increased mammographic breast density is not associated with higher breast cancer incidence in women with BRCA mutations. On the basis of these findings, density should not be considered a factor for these women in decision making regarding prophylactic surgery or chemoprevention.

The attitudes of women with BRCA1 and BRCA2 mutations toward clinical breast examinations and breast self-examinations.

AIMS: In screening studies of women with BRCA mutations, magnetic resonance imaging (MRI) plus mammography has >90% sensitivity for detecting breast cancer, with negligible benefit from the addition of breast self-examination (BSE) or clinical breast examination (CBE). Yet CBE is still frequently recommended, and BSE is encouraged for these women. We sought to determine the attitudes of high-risk women toward CBE and BSE. METHODS: Between November 2005 and May 2006, 137 women with BRCA mutations participating in a screening study consisting of annual MRI and mammography plus semiannual CBE were asked to complete a mailed Likert-type questionnaire. RESULTS: Of the 94 (67%) respondents, mean age 47 (range 28-67), 94% strongly agreed or agreed that CBE was an important way to detect breast cancer, and almost all believed it provided an important connection to the healthcare team. Only 10% said it increased anxiety. Of the 71 (77%) who performed BSE at least occasionally, 53 thought that regular BSE gave them a sense of control over their own health. Of the 21(23%) who did not practice BSE at all, only 3 did not believe that BSE was helpful, and it made 9 more worried about breast cancer CONCLUSIONS: Although CBE adds little to cancer detection rates in women with BRCA mutations screened with MRI, the majority of these women considered CBE to be reassuring and an important means of connecting with the healthcare team. Compliance with BSE was only moderate, but it gave a significant proportion of women a greater sense of control.

Incidental MRI detection of BRCA1-related solitary peritoneal carcinoma during breast screening--A case report.

BACKGROUND: The reported cumulative risk of developing primary peritoneal carcinoma (PPC) one to 20 years after prophylactic bilateral oophorectomy is 3.5% to 4.3%. Virtually all reported cases have been stage III or IV. CASE: During MRI screening of the breasts, an incidental mass on the surface of the liver was identified in a 56-year-old BRCA1 mutation carrier who had undergone prophylactic bilateral salpingo-oophorectomy several years previously with no evidence of malignancy. After four cycles of chemotherapy a localized, grade 3 serous papillary adenocarcinoma was resected followed by further chemotherapy and radiation. She remains disease-free 3 years post-treatment. CONCLUSION: The literature on PPC after prophylactic oophorectomy is reviewed. To the best of our knowledge, this is the first description of an apparently localized case of BRCA related PPC outside the pelvis.

MR imaging-guided breast localization system with medial or lateral access.

PURPOSE: To evaluate the degree of error of the authors' magnetic resonance (MR) imaging-guided needle localization system for biopsy of suspicious lesions visualized only with MR imaging, by using both prospectively recorded and retrospectively reviewed data, including MR imaging lesion coordinates as the reference standard, and to determine whether any lesion or breast characteristics affect this error. MATERIALS AND METHODS: Institutional review board approval, along with informed consent, was obtained as directed by the board. In 31 patients (age range, 34-64 years; mean age, 54.5 years), 38 wires were placed for 35 lesions by means of an MR-guided needle localization system with medial or lateral access and computer software assistance for needle placement calculation. Needle and wire placement error measurements were calculated before and after necessary placement correction, accounting for tissue shift in the z plane. The error was statistically correlated with MR imaging lesion variables, breast density, and histopathologic findings by means of univariate and multivariate linear regression analyses or two-tailed paired t test. Procedure times and the frequency of medial or lateral approaches were recorded. RESULTS: Eleven of 35 localizations (31%) were medial, and 24 of 35 (69%) were lateral. The mean total magnet time was 61.6 minutes, and the mean needle deployment time was 9 minutes (range, 4-17 minutes). Sixteen of 35 lesions (46%) were malignant (seven ductal carcinoma in situ, six invasive ductal, two invasive lobular, and one lymphoma). The mean uncorrected needle placement error was 1.3 mm (range, 0-6 mm) for the x plane, 2.4 mm (range, 0-6.5 mm) for the y plane, and 5.6 mm (range, 0-15.6 mm) for the z plane. Fourteen of 38 needles (37%) required repositioning for z-plane error. The corrected z-plane error improved to 3.2 mm (range, 0-10.0 mm). Factors that significantly increased the uncorrected error included tissue shift in the z plane (R = 0.7), small lesion size (R = -0.59), and fatty breast density (P = .029). CONCLUSION: The authors' system is accurate for performing MR-guided needle localizations for both medial and lateral approaches. Factors that increased the uncorrected needle placement error included small lesion size, fatty breast density, and tissue shift in the z plane.