a pioneer simulation curriculum of suture technique training for medical students introduction: Simulation has demonstrated utility in suture skills training on surgical residents. Objective: Evaluate validity of a simulated training curriculum of basic suture skills for medical students. methods: Study conducted on 2013. Medical students were selected from the School of Medicine of Pontificia Universidad Católica de Chile (EMPUC). The program included four theoretical sessions and six practical sessions in order to training basic surgical tasks (five in total) on a simulated rubber model: one handed knot-tying, simple suture, vertical mattress suture, subcuticular interrupted suture and subcuticular running suture. A survey was applied to the participants to qualify each element of the program, on a scale of 1 to 7 (face-validity). One task (simple suture) was recorded on video, before and after training, to be evaluated by two experts on a blind fashion (content validity). Experts measure participant skills using an OSATS (Objective Structured Assessment of Technical Skills) and operative time. Statistical analysis for non-parametric variables, median and interquartile range, significant p-value < 0.05. results: Thirty-six medical students participated, with assistance percentage was over 80%. Students qualified the experience favorably: simulated bench-model 6.0 ; p < 0.001) after training in every participant. conclusion: This simulated curriculum delivers an alternative method for the development of technical competencies in medical students and could be incorporated on medical schools curricula.

Survival of patients with metastatic breast cancer according to pathological types of tumors (56.4 and 11.4 months, respectively, p = 0.04). Conclusions: Patients with metastatic BC at diagnosis often had HER2 positive tumors and high HG. As in other studies, ER positive tumors had a better survival. (Rev Med Chile 2014; 142: 428-435)

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Intraoperative frozen section of the sentinel lymph nodes in breast cancerIntroduction: The sentinel lymph node (SN) biopsy has become the standard technique for staging the axillary involvement in breast cancer. The intraoperative diagnosis of lymph node metastatic involvement can immediately decide the need for axillary dissection. The main objective of this study was to determine the accuracy of intraoperative frozen section in the investigation of metastases in the SN, in patients with breast cancer, between 1999 and 2011. Materials and Methods: A retrospective study of patients operated for invasive breast cancer, in which the SN was studied with intraoperative frozen section. Results: 503 patients biopsy was performed with intraoperative frozen section. One hundred fifty-four (30.6%) patients had metastases in the SN, of these 103 (66.9%) were detected on frozen section. No significant difference in the ability to detect metastases for tumors up to 2 cm and tumors more than 2 cm was observed (p = 0.86). The sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) of frozen section for detection of metastases in the SN was 66.9%, 99.7%, 99% and 87%, respectively. Conclusions: The accuracy of intraoperative biopsy for detection of metastases in the SN in our center is comparable to that described in the literature, being effective only for the investigation of macrometastases (MA). Given the low frequency of metastases in the SN in tumors up to 2 cm, associated with a relatively high number of micro (MI) and submicrometastasis (SM) and false negatives, it seems that in these tumors intraoperative biopsy is unnecessary.

Radiotherapy was well tolerated and had excellent local control. Screening mammography detects small tumors. Survival is excellent for early stage breast cancer.