Defining female gluteal geometry for preoperative planning in body contouring

Introduction: The increasing prevalence of procedures aimed at modifying the female body silhouette-particularly gluteoplasty, liposuction, and the Brazilian butt lift (BBL)-highlights the need for a sufficient number of reference points and lines to objectively describe these interventions and assess their outcomes. Material and methods: For the lateral profile, we identified five horizontal reference lines, all parallel to one another, drawn through what we consider the principal landmarks of the posterior trunk curvature. For the posterior view, five horizontal lines were similarly drawn, parallel to one another, corresponding to key posterior landmarks. After tracing these lines in both the lateral and posterior views, we assessed whether recognizable geometric shapes and/or relationships could be identified among them. Results: We observed that attractive proportions of the lateral female pelvis can be inscribed within a cone-shaped ovoid oriented at approximately 50° relative to the vertical axis. In the posterior view, rectangles and two ovoids may also be identified. Conclusions: In our view, describing geometric parameters may contribute to a more systematic and standardized framework for characterization and preoperative planning.Combining lateral and posterior reference lines allowed identification of multiple geometric configurations, including rectangles and ovoids, which may facilitate visualization of spatial relationships among gluteal structures.