Breast cancer is an oncologic process in which healthy cells of the mammary gland degenerate and transform into tumor cells, proliferating and multiplying until the tumor is formed. It is known that breast cancer is one of the main causes of death in women. Therefore, mastectomy is one of the most used medical interventions to prevent, fight or stop breast cancer totally or partially. Due to this, the aim of this work was to determine the method or methods used for breast reconstruction for patients with a history of breast cancer after a total or partial mastectomy, and also to know a little about possible complications if any, to know which would be the most assertive to apply to the patient, for which information was collected in databases, and using a method similar to PRISMA a necessary number of articles that met the criteria for the preparation of the work were chosen, and search terms were used in pages such as MESH/DECS. Among the main methods found to achieve breast reconstruction was the immediate reconstruction that can even be applied at the time of mastectomy, however, the technique to be used will depend on the patient’s case, as soft tissue flaps can be used, as well as autologous tissues that are cataloged with better results even than radiotherapy.

La hemorragia es una complicación rara en la cirugía bariátrica, donde su prevalencia es de hasta 4% de procedimientos, y esta variará de acuerdo con los distintos procedimientos realizados, además la hemorragia que ocurre posterior a una cirugía bariátrica se clasifica como aguda, temprana, tardía y crónica, también depende del lugar de la hemorragia debido a que puede ser intraabdominal e intraluminal. Paciente masculino de 29 años de edad, con antecedentes de diabetes mellitus tipo 2 y obesidad grado I, a quien se le realizó un bypass gástrico, presenta al post quirúrgico inmediato melenas por varias ocasiones, a esto se le suma astenia generalizada, lo que lleva a plantear el diagnóstico de hemorragia digestiva. El tratamiento adecuado es la cirugía, sin embargo, se decide realizar tratamiento conservador. Este manejo es expectante ya que ayuda a resolver en conjunto la mayoría de los casos, así mismo permite al paciente mejorar su cuadro clínico y reduce la posibilidad de que existan signos de alerta, en esta ocasión presentó una eficacia total con una excelente recuperación