Longitudinal Trends in Patient-Reported Outcomes in the First Year After Lumpectomy Versus Mastectomy.

BACKGROUND: It is unclear how patient-reported outcomes (PROs) change longitudinally after breast cancer surgery. We sought to compare trends in PROs among patients who underwent lumpectomy versus mastectomy over the first year after surgery. PATIENTS AND METHODS: Newly diagnosed stage 0-III female patients with breast cancer who underwent lumpectomy or mastectomy at an academic breast center between June 2019 and March 2023 were invited to participate in a longitudinal PRO study. Enrolled patients received the BREAST-Q™ module, a validated tool measuring domains, such as satisfaction with breasts, psychosocial well-being, physical well-being, and sexual well-being. Scores for each domain were compared between the lumpectomy and mastectomy groups over the first year after surgery. Linear mixed models were used to estimate the change in PRO scores over time. RESULTS: The cohort included 203 who underwent lumpectomy and 144 who underwent mastectomy. Patients who underwent lumpectomy were older, more likely to receive adjuvant radiation and endocrine therapy, and less likely to receive adjuvant chemotherapy. Patients who underwent lumpectomy demonstrated greater increases in scores over time for satisfaction with breasts, psychosocial well-being, and sexual well-being compared with patients who underwent mastectomy, after adjusting for the abovementioned covariates and receipt of reconstruction. The lumpectomy group had a larger decline in physical well-being over time compared with the mastectomy group. CONCLUSIONS: Patients who underwent lumpectomy demonstrated greater satisfaction with their breasts, psychosocial well-being, and sexual well-being but worse physical well-being over the first year after surgery compared with patients who underwent mastectomy. These results may help inform early-stage breast cancer patients making decisions about their surgical care.

Clinical implications of receptor conversions in breast cancer patients who have undergone neoadjuvant chemotherapy.

PURPOSE: In this study, we aimed to determine the incidence of receptor conversions after neoadjuvant chemotherapy (NAC) for breast cancer and assess the rate at which receptor conversion leads to changes in adjuvant therapy regimens. METHODS: We performed a retrospective review of female breast cancer patients treated with NAC at an academic breast center between January 2017 and October 2021. Patients with residual disease on surgical pathology and complete receptor status information for both pre-NAC and post-NAC specimens were included. Incidence of receptor conversions, defined as a change in at least one hormone receptor (HR) or HER2 status compared to preoperative specimens, was tabulated, and adjuvant therapy modalities were reviewed. Factors associated with receptor conversion were analyzed using chi-square tests and a binary logistic regression. RESULTS: Of the 240 patients with residual disease after NAC, 126 (52.5%) had receptor testing repeated. After NAC, 37 specimens (29%) had a receptor conversion. Receptor conversion resulted in the addition or removal of an adjuvant therapy in 8 patients (6%), indicating a number needed to screen of 16. Prior history of cancer, receipt of initial biopsy at an outside site, HR-positive tumors, and a pathologic stage of II or lower were factors associated with receptor conversions. CONCLUSION: HR and HER2 expression profiles frequently change after NAC and drive adjustments in adjuvant therapy regimens. Repeat testing of HR and HER2 expression should be considered in patients who receive NAC, especially in patients with early stage, HR-positive tumors whose initial biopsies were performed externally.

De-implementation of Axillary Dissection in Women Undergoing Mastectomy for Breast Cancer.

BACKGROUND: Completion axillary lymph node dissection (cALND) was standard treatment for breast cancer with positive sentinel lymph nodes (SLNs) until 2011, when data from the Z11 and AMAROS trials challenged its survival benefit in early stage breast cancer. We assessed the contribution of patient, tumor, and facility factors on cALND use in patients undergoing mastectomy and SLN biopsy. PATIENTS AND METHODS: Using the National Cancer Database, patients diagnosed from 2012 to 2017 who underwent upfront mastectomy and SLN biopsy with at least one positive SLN were included. A multivariable mixed effects logistic regression model was used to determine the effect of patient, tumor, and facility variables on cALND use. Reference effect measures (REM) were used to compare the contribution of general contextual effects (GCE) to variation in cALND use. RESULTS: From 2012 to 2017, the overall use of cALND decreased from 81.3% to 68.0%. Overall, younger patients, larger tumors, higher grade tumors, and tumors with lymphovascular invasion were more likely to undergo cALND. Facility variables, including higher surgical volume and facility location in the Midwest, were associated with increased use of cALND. However, REM results showed that the contribution of GCE to the variation in cALND use exceeded that of the measured patient, tumor, facility, and time variables. CONCLUSIONS: There was a decrease in cALND use during the study period. However, cALND was frequently performed in women after mastectomy found to have a positive SLN. There is high variability in cALND use, mainly driven by interfacility practice variation rather than specific high-risk patient and/or tumor characteristics.

De-implementation of Axillary Dissection in Women With Breast Cancer is Largely Driven By Site-level Contextual Effects.

OBJECTIVE: To assess the contribution of unknown institutional factors (contextual effects) in the de-implementation of cALND in women with breast cancer. SUMMARY OF BACKGROUND DATA: Women included in the National Cancer Database with invasive breast carcinoma from 2012 to 2016 that underwent upfront lumpectomy and were found to have a positive sentinel node. METHODS: A multivariable mixed effects logistic regression model with a random intercept for site was used to determine the effect of patient, tumor, and institutional variables on the risk of cALND. Reference effect measureswere used to describe and compare the contribution of contextual effects to the variation in cALND use to that of measured variables. RESULTS: By 2016, cALND was still performed in at least 50% of the patients in a quarter of the institutions. Black race, younger women and those with larger or hormone negative tumors were more likely to undergo cALND. However, the width of the 90% reference effect measures range for the contextual effects exceeded that of the measured site, tumor, time, and patient demographics, suggesting institutional contextual effects were the major drivers of cALND de-implementation. For instance, a woman at an institution with low-risk of performing cALND would have 74% reduced odds of havinga cALND than if she was treated at a median-risk institution, while a patient at a high-risk institution had 3.91 times the odds. CONCLUSION: Compared to known patient, tumor, and institutional factors, contextual effects had a higher contribution to the variation in cALND use.

Patient Perceptions of Changes in Breast Cancer Care and Well-Being During COVID-19: A Mixed Methods Study.

BACKGROUND: Widespread healthcare restructuring due to the COVID-19 pandemic led to modifications in the timing and delivery of care for breast cancer patients. Our study explores patient concerns relating to COVID-19, breast cancer, and changes to breast cancer care. PATIENTS AND METHODS: Breast cancer patients who presented for surgical consultation at an academic, multidisciplinary clinic completed the electronically distributed validated COVID-19 Impact and Healthcare Related Quality of Life questionnaire between August 2020 and February 2021. This questionnaire uses Likert score responses to assess COVID-specific concerns within domains, including distress and financial hardship. Scale scores were determined by averaging items within each domain, and scores > 2 indicated greater disruption. Semistructured interviews were conducted with patients who indicated interest in participating in the questionnaire. RESULTS: Of 381 patients recruited, 133 patients completed the questionnaire and 20 patients completed interviews. Sixty-three percent of survey participants reported attending a telemedicine appointment for their cancer care, and the majority (67%) were satisfied with their experience. Half of the participants (50%) reported fear about how the COVID-19 pandemic will impact their cancer care or recovery, and 66% reported anxiety about contracting COVID-19. Twenty-two percent of participants reported decreased income due to COVID-19. Patient interviews revealed tangible changes to care and provided in-depth information on the advantages and disadvantages of telehealth. CONCLUSIONS: Breast cancer patients report anxiety about COVID-19 infection and potential care modifications. Our study identifies impacts on patients' care and quality of life. Further investigation will inform interventions to improve psychosocial outcomes for patients and the telehealth experience.

Early Trajectories of Patient Reported Outcomes in Breast Cancer Patients Undergoing Lumpectomy Versus Mastectomy.

PURPOSE: This study was designed to: (1) characterize longitudinal patient-reported outcomes (PROs) between breast cancer patients undergoing lumpectomy and mastectomy and (2) compare return to baseline scores at 3 months and 6 months postoperatively. METHODS: Newly diagnosed breast cancer patients seen at an academic breast center between June 2019 and February 2021 were invited to participate in longitudinal PRO surveys at their initial clinic visit. If willing to participate, patients were emailed the validated BREAST-Q™ questionnaire at the initial clinic visit (baseline), 2 weeks after surgery, and then every 3 months for the first year. We used linear mixed models to estimate the differences in slopes over time between lumpectomy and mastectomy for each PRO measure. Pearson's Chi-square tests with Yates' continuity correction were used to compare proportions of patients who return to baseline PRO scores. P < 0.05 was considered significant. RESULTS: Of 164 patients invited to participate, 100 (61%) completed a baseline survey and were included in analyses. Mastectomy patients had significantly greater decreases in breast satisfaction (P = 0.002), psychosocial well-being (P < 0.0001), and sexual well-being (P < 0.0001) over time compared with lumpectomy patients. Both surgical groups reported a decrease in physical well-being, although the decline was more significant in lumpectomy patients (P = 0.005). At 3 months and 6 months after surgery, significantly larger proportions of lumpectomy patients returned to their baseline breast satisfaction, psychosocial well-being, and physical well-being compared with mastectomy patients. CONCLUSIONS: Understanding how outcomes important to patients change over the care continuum can provide opportunities for early intervention and may prevent debilitating long-term morbidities of treatment.

Atypical ductal hyperplasia bordering on DCIS on core biopsy is associated with higher risk of upgrade than conventional atypical ductal hyperplasia.

PURPOSE: Upgrade rates of conventional ADH are reported at 10-30%; however, rates for ADH bordering on DCIS (ADH-BD) are largely unknown. We examined the upgrade rate of ADH-BD and core needle biopsy (CNB) features associated with upgrade. Surgical management in patients with concurrent ipsilateral breast cancer (BC) was also examined. METHODS: From 2000 to 2018, women with CNB diagnosis of ADH-BD were prospectively identified. Women with pure ADH-BD and concurrent ipsilateral ADH-BD/BC were analyzed separately, and upgrade rates were calculated. CNB features associated with upgrade and type of surgery were examined in women with pure ADH-BD; CNB features and concurrent pathology associated with upgrade were examined in women with ipsilateral BC. RESULTS: 108/236 (46%) patients with pure ADH-BD on CNB had DCIS (40%) or invasive carcinoma (6%) on surgical excision. DCIS or invasive carcinoma was more frequently found on excision of a mass that yielded ADH-BD on biopsy than excision of calcifications (65% vs 38%; p < 0.001). The breast conservation success rate was high (80%) in patients who upgraded, despite a high re-excision rate of 46%. The upgrade rate of ADH-BD in women with concurrent ipsilateral BC was 41%. Most women (94%) with ADH-BD in the same quadrant as the BC were candidates for breast conserving surgery, with a success rate of 89%. CONCLUSION: The upgrade rate for pure ADH-BD is significantly higher than that reported for women with conventional ADH, especially in women with a mass on imaging. The upgrade rate of concurrent ipsilateral ADH-BD and BC is similarly high. Excision with a margin of normal tissue and specimen inking should be routine to minimize the need for re-excision.

Contralateral Prophylactic Mastectomy Use After Neoadjuvant Chemotherapy.

BACKGROUND: Neoadjuvant chemotherapy (NAC) for breast cancer increases breast-conserving surgery (BCS) rates, but many women opt for mastectomy with contralateral prophylactic mastectomy (CPM). Here we evaluate factors associated with CPM use in women undergoing mastectomy post-NAC. METHODS: A retrospective institutional NAC database review identified women with clinical stage I-III, unilateral invasive breast cancer undergoing unilateral mastectomy (UM) or CPM mastectomy from 9/2013 to 12/2017. Clinical/pathologic characteristics, imaging, and presence of contraindications to BCS post-NAC were compared, with subset analysis of BCS candidates. The multivariable analysis was adjusted for potential confounders. RESULTS: Five hundred sixty-nine women underwent mastectomy after NAC, 297 (52%) UM and 272 (48%) CPM. On univariable analysis, younger age, BRCA+, lower pre-NAC clinical stage, pathologic complete response, and axillary surgery extent were associated with CPM (all p < 0.01). Favorable post-NAC clinical factors of no residual palpable disease, clinically negative nodes, complete response on breast imaging, and no post-NAC contraindication to BCS were also associated with CPM (all p < 0.01). On multivariable analysis, young age (odds ratio [OR] 0.93, 95% confidence interval [CI] 0.91-0.95), lower pre-NAC stage (OR 0.51, 95% CI 0.34-0.77), and no contraindication to BCS (OR 3.12, 95% CI 2.02-4.82) were significantly associated with CPM. Among the 203 (35%) women who had no contraindications to BCS post-NAC, 145 (71%) underwent CPM. BRCA+ and family history were reasons more frequently cited for mastectomy among CPM than UM (p < 0.001). CONCLUSIONS: CPM was performed in 48% of women undergoing mastectomy after NAC; younger women with earlier-stage cancers were more likely to undergo CPM. While increased use of CPM in women with more favorable disease is medically appropriate, our findings indicate a lost opportunity for use of BCS.

Reassessing Opioid Use in Breast Surgery.

BACKGROUND: This study aims to assess multimodal pain management and opioid prescribing practices in patients undergoing breast surgery. METHODS: A retrospective review of patients undergoing breast surgery at an academic medical center between April 1, 2018 and September 30, 2019, was performed. Patients with a history of recent opioid use or conditions precluding use of nonsteroidal anti-inflammatory drugs (NSAIDs) or acetaminophen (APAP) were excluded. Opioid-sparing pain regimens were assessed. Opioids prescribed on discharge were recorded as oral morphine equivalents (OMEs) and concordance with the Opioid Prescribing Engagement Network (OPEN) determined. RESULTS: The total study population consisted of 518 patients. 358 patients underwent minor outpatient procedures (sentinel lymph node biopsy, lumpectomy, and excisional biopsy), 10-40% of whom were appropriately prescribed as per the OPEN. Perioperatively, 53.9% of patients received APAP, 24.6% NSAIDs, 20.4% gabapentin, and 0.3% blocks; intraoperatively, 95.8% received local anesthetic and 25.7% ketorolac. For mastectomy without reconstruction, 63-88% of prescriptions were concordant with the OPEN. For mastectomy with reconstruction, discharge opioids ranged from 25 to 400 OMEs with a mean of 134.4 OMEs; 25% of patients received a refill. Of all patients undergoing mastectomy ± reconstruction, 62.5% received APAP, 18.8% NSAIDs, 38.8% pregabalin, and 20.6% locoregional block perioperatively; 37.5% received local anesthetic and 15.6% ketorolac intraoperatively. Of 143 inpatient stays, 89% received APAP, 38% NSAID, and 29% benzodiazepines; 29 patients received no opioids inpatient but were still prescribed 25-200 OMEs on discharge. CONCLUSIONS: There is need for a multidisciplinary approach to pain management with the use of enhanced recovery after surgery protocols as potential means to standardize perioperative regimens and mitigate opioid overprescription.

Increasing omission of radiation therapy and sentinel node biopsy in elderly patients with early stage, hormone-positive breast cancer.

Prospective evidence demonstrates that there is limited benefit of axillary staging with sentinel lymph node biopsy (SLNB) or radiation therapy (RT) in patients over age 70 with clinical stage I, hormone-positive breast cancer. The clinical impact of this literature is unknown. Our hypothesis is that omission of SLNB and RT has increased over time in these patients, and patient and tumor characteristics can predict when omission strategies are used. A single-center tumor registry was queried for all patients over age 70 with ER+, Her2/neu-negative, clinical T1N0 invasive breast cancer from 2009 to 2017, who underwent breast conservation (n = 141). Date of treatment, age, tumor characteristics, use of SLNB, and use of RT were evaluated. The trend of treatment strategy over time was evaluated. Multivariable analysis was performed on the subgroup of patients after publication of the long-term follow-up CALGB 9343 data1 . Patients undergoing treatment with omission of RT and SLNB increased over the study period (P = .0006). Patients who did not receive RT were older (78.76 years ± 5.48 vs 73.37 ± 3.63, P < .01). There was no difference between tumor grade and size between uses of RT. Of patients who received SLNB (n = 84), only 3 (3.5%) had a positive LN. On multivariable analysis of patients who were treated after publication of the CALGB 9343 data (2014-2017), only age was predictive of being treated with RT (OR, 0.77; 95% CI, 0.67-0.88). Omission of both RT and SLNB are increasing in clinical practice in appropriately selected patients. The likelihood that patients are offered omission of these interventions increases with age. Low nodal positivity rates suggest that this strategy may be underutilized. Tumor grade and size were not predictive of omission of RT in this group of low-risk patients. Long-term data are needed as these approaches are increasingly adopted.

Issues with Fertility in Young Women with Breast Cancer.

PURPOSE OF REVIEW: There are competing risks and benefits of cancer therapies and fertility preservation in young women with breast cancer. Here we discuss the impact of therapy on fertility, fertility preservation options, and emerging information in fertility issues for the breast cancer patient. RECENT FINDINGS: All systemic forms of breast cancer treatment can impact future fertility. Pre-therapy fertility preservation may offer the best opportunity for future fertility. Shared decision making with the individual patient and clinical scenario is important. Early referral to a fertility specialist should be offered to young patients. We find that fertility preservation options for young women diagnosed with breast cancer are currently available, but potentially under-utilized. We conclude that a multidisciplinary approach is necessary, with discussion of potential risks and benefits of fertility preservation options in the context of the patient's clinical disease.

Gestating Healthy Policies for Young Parents.

This Viewpoint discusses the need for modernized national and program-level policies that foster a culture to support early-career physicians balancing their professional growth and personal family desires.

Transforming Perceptions: The Impact of a Formal Parental Leave Policy on Surgical Trainees.

OBJECTIVE: Surgical trainees who welcome a new child during residency often face challenges related to appropriate parental leave. To address this, we instituted a comprehensive family medical leave policy within our training program and assessed resident perceptions before and after the policy's introduction. We hypothesized that this new formal policy would enhance feelings of support amongst all (not just childbearing) trainees. DESIGN: A web-based survey to gauge resident perceptions on parental leave was distributed to all residents at a single academic general surgery residency at 2 intervals: prior to policy implementation and 1 year after policy implementation. SETTING: The study was conducted at a single institution, academic general surgery residency program. PARTICIPANTS: All general surgery residents at the institution were included (n = 95). RESULTS: About 40 out of 95 (42%) residents participated in the initial survey and 25 of 95 (26%) completed the subsequent survey. There was a significant improvement in resident reported satisfaction with the policy from pre to post: 15% pre to 68% post, p < 0.001, report the policy frequently supported trainees' needs, 20% pre to 88% post, p < 0.001, perceived the policy as fair. Most residents (90.0% pre and 80.0% post) perceived pregnancy as a risk during surgical training. There were no differences in perception of the new policy between residents who were parents and residents who were not parents. CONCLUSIONS: The introduction of a comprehensive family medical leave policy improved all surgical trainees' (including nonparents) perception of policy effectiveness and policy fairness. This is counter to the published perception that parental leave creates a burden on fellow trainees. However, pregnancy remains a stressor for the individual new parent. Surgical programs can develop supportive formal family medical leave policies; it is important to address the inherent systemic and cultural barriers surrounding childrearing during surgical training.

Preliminary Development of a Program ABSITE Dashboard (PAD) to Guide Curriculum Innovation.

PURPOSE: Medical Knowledge for general surgery residents' is assessed by the American Board of Surgery In- Training Examination (ABSITE). ASBITE score reports contain many metrics residency directors can utilize to assess resident progress and perform program evaluation. The purpose of this study was to develop a framework to evaluate program effectiveness in teaching specific subtest and subtopic areas of the ABSITE, using ABSITE score reports as an indicator. The aim is to demonstrate the identification of topic areas of weakness in program-wide performance on the ABSITE to guide proposed modification of the general surgery residency program curriculum, and to initiate development of a data visualizing dashboard to communicate these metrics. METHODS: A single institution retrospective study was performed utilizing ABSITE score reports from general surgery residents at a large academic training program from 2017 to 2020. ABSITE performance metrics from 320 unique records were entered into a database; statistical analysis for linear trends and variance were conducted for standard scores, subtest standard scores, and incorrect subtest topics. Deviation from national average scores were calculated by subtracting the national average score from each subtest score for each trainee. Data were displayed as medians or proportions and are displayed to optimize visualization as a proof-of-concept for the development of a program dashboard. RESULTS: Trends and variance in general surgery program and cohort performance on various elements of the ABSITE were visualized using figures and tables that represent a prototype for a program dashboard. Figure A1 demonstrates one example, in which a heatmap displays the median deviation from national average scores for each subtest by program year. Boxplots show the distribution of the deviation from national average, range for national average scores, and the recorded scores for each subtest by program year. Trends in median deviation from the national average scores are displayed for each program year paneled by subtest or for each exam year paneled by cohort. Median change in overall test scores from one program year to another in a cohort is visualized as a table. Bar graphs show the most often missed topics across all program years and heatmaps were generated showing the proportion of times each topic was missed for each subtest and exam year. CONCLUSIONS: We demonstrate use of ABSITE reports to identify specific thematic areas of opportunities for curriculum modification and innovation as an element of program evaluation. In this study we demonstrate, through data analysis and visualization, feasibility for the creation of a Program ABSITE Dashboard (PAD) that enhances the use of ABSITE reports for formative program evaluation and can guide modifications to surgery program curriculum and educational practices.

Effects of E-Liquids and Their Aerosols on Biofilm Formation and Growth of Oral Commensal Streptococcal Communities: Effect of Cinnamon and Menthol Flavors.

(1) Background: The rise in electronic cigarette (E-cigarette) popularity, especially among adolescents, has prompted research to investigate potential effects on health. Although much research has been carried out on the effect on lung health, the first site exposed to vaping-the oral cavity-has received relatively little attention. The aims of this study were twofold: to examine the effects of E-liquids on the viability and hydrophobicity of oral commensal streptococci, and the effects of E-cigarette-generated aerosols on the biomass and viability of oral commensal streptococci. (2) Methods: Quantitative and confocal biofilm analysis, live-dead staining, and hydrophobicity assays were used to determine the effect on oral commensal streptococci after exposure to E-liquids and/or E-cigarette-generated aerosols. (3) Results: E-liquids and flavors have a bactericidal effect on multispecies oral commensal biofilms and increase the hydrophobicity of oral commensal streptococci. Flavorless and some flavored E-liquid aerosols have a bactericidal effect on oral commensal biofilms while having no effect on overall biomass. (4) Conclusions: These results indicate that E-liquids/E-cigarette-generated aerosols alter the chemical interactions and viability of oral commensal streptococci. Consequently, the use of E-cigarettes has the potential to alter the status of disease and health in the oral cavity and, by extension, affect systemic health.

Attitudes of Surgical Trainees and Faculty Towards Parental Leave During Surgical Training.

OBJECTIVE: Our aim was to better understand attitudes towards parental leave from the perspective of both surgeon faculty and current surgical trainees. We hypothesized that support for trainees to take parental leave would vary by year of residency graduation and by parental status. DESIGN: We conducted a web-based survey regarding opinions on trainee parental leave. Quantitative and conventional content qualitative analyses were performed. PARTICIPANTS: Surveys were sent to surgeon faculty and current trainees from 5 large academic surgical residency programs. RESULTS: Survey response rates were 11.5% for surgeon faculty (68/589), and 17.7% for trainees (50/281). There were 80/118 (67.8%) respondents who reported they had or were currently expecting children, 40/80 (50%) of whom were the gestational carrier. Most thought that 6-12 weeks of parental leave should be given to child-bearing trainees (62/118, 52.5%); another 32.2% (38/118) thought >12 weeks should be given. Responses were similar amongst surgeon faculty and trainees, parents and nonparents, and respondents who identified as men and women. Qualitative analysis revealed that most respondents felt parental leave did not put unreasonable strain on other trainees and felt support could be shown both informally and with formal written policies facilitating patient care coverage. Current surgeon faculty were less likely to feel moderately/extremely supported by their faculty compared to trainees (39% vs 77%, p = 0.004). Less than a third (37/117, 31.6%) of respondents knew the current leave policies. CONCLUSIONS: Amongst survey respondents, there was broad support for parental leave for surgical trainees of at least 6 weeks amongst trainees and faculty, and those with and without children. Current trainees felt more supported than current surgical faculty, suggesting that parental leave is increasingly more accepted. Support can be shown both informally and through easily accessible written policies and procedures that facilitate patient care coverage.

Formal Parental Leave Policies and Trainee Well-Being in US Graduate Medical Education: A Systematic Review.

Background Variability in parental leave policies across graduate medical education (GME) programs in the United States complicates efforts to support resident wellness and identify best practices for resident well-being. Objective This review aims to assess how formal parental leave policies affect trainees' well-being, professional satisfaction, and performance during training. Methods A systematic review following the Preferred Reporting Items for Systematic Reviews and Meta Analyses (PRISMA) 2020 guidelines was conducted and registered on PROSPERO in May 2023. Databases searched included MEDLINE, Embase, and Cochrane Central. Studies that evaluated parental leave policies of US-based GME programs and their direct impact on residents and/or fellows were included. Studies were screened for inclusion by 2 independent reviewers, and any conflicts were resolved by a third author. Results Of 1068 articles screened, 43 articles met inclusion criteria. These studies highlighted that leave durations of less than 6 weeks were associated with higher rates of burnout and postpartum depression among trainees. There was no evidence that taking parental leave increased program attrition rate; however, 3 studies reported more than one-third of trainees extended training as a result of taking leave. Trainees who had more than 8 weeks of parental leave reported more successful breastfeeding 6 months out from delivery than those with less than 8 weeks of leave. Conclusions Extended parental leave, notably beyond 6 weeks, improved trainee well-being and professional satisfaction. Based on trainees' perspectives, ideal parental leave policies offer a minimum of 6 to 8 weeks of leave, with a formal and clearly written policy available.