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Background The current methods for calculating the ideal implant volume for breast reconstruction are based on pre- or intraoperative volume measurements of the existing breast volume and do not take into account the individual breast density of the woman. This study aims is to identify objective parameters that can help to improve the optimal implant selection. Materials and methods This retrospective analysis includes 198 breast cancer patients who underwent mastectomy. Breast densities (ACR) measured in mammography and MRI were compared with the removed breast tissue weight and volume of the implants used. In addition, the resected weight was compared directly with the implant volume to calculate a mathematical function. Results There was no significant correlation between the ACR values and the resected weights [correlation coefficient: mammography:− 0.117 ( p  = 0.176), MRI − 0.033 ( p  = 0.756)]. A negative correlation between the implant volumes and both imaging methods could be demonstrated [correlation coefficient: mammography − 0.268;  p  = 0.002; MRI was − 0.200 ( p  = 0.055)]. A highly significant correlation between the resected weights and the implant volumes (correlation coefficient 0.744;  p  &lt; 0.001) was observed. This correlation corresponds to a power function ( y  = 34.71  x  0.39 ), in which any resected weight can be used for the variable  x  to calculate the implant volume. Conclusion We were able to show that there is a significant correlation between the resected breast tissue and the implant volume. With our novel potency function, the appropriate implant volume can be calculated for any resected weight making it easier for the surgeon to choose a fitting implant in a simple and more objective manner.

Correlation analysis of resected breast tissue and implant volume after mastectomy and its association with breast density