Morphometric study of post menarcheal nulliparous breasts, their clinical relevance and relationship with body size indicators in a Nigerian population

Background: The female breast is a symbol of femininity and aesthetics having a great psychosocial impact on the woman's sense of wellbeing and self-esteem. To optimize satisfaction of patients in cosmetic and reconstructive breast surgeries, there is a need to define the dominant breast size and shape that connotes feminine attractiveness. This necessitates the knowledge of ideal data for normal nulliparous female breast parameters and volume for various body sizes in the particular population, nationality, and race. Aim: To establish reference data for normal breast parameters and volumes for the various body sizes amongst the Nigerian population and to determine their relationships with other body parameters. Patients and Methods: A total of 528 breasts from 264 Nigerian undergraduate post-menarcheal nulliparous students of the University of Nigeria Enugu Campus aged between 17 and 29 years were measured. Thirty-one (31) anthropomorphic parameters and five body size anthropometric indicators were measured. Data obtained were analyzed using Statistical Package for Social Sciences (SPSS) version 21(IBM) and were summarized using various descriptive statistics tools. Results: The mean nipple-nipple distance is 23.37 +/- 3.10. The mean left Midclavicle-nipple Length (22.17 +/- 3.5 cm) is significantly (P = 0.04) higher than the right (21.79 +/- 3.3 cm) just as the mean left (12.60 +/- 2.5) medial radius is significantly (P = 0.0001) longer than the right (12.45 +/- 2.4 cm). The mean left nipple projection (0.37 +/- 0.2 cm) and left vertical surface dimension (32.27 +/- 5.7 cm) are significantly (P > 0.05) longer than the right (0.33 +/- 0.2) and (31.76 +/- 5.2 cm). Also the mean volume for the left breast (605.26 +/- 280.52 cm) is significantly (0.0001) higher than that of the right breast (592.53 +/- 278.69). Breast volume correlated well with most of the breast parameters, BMI, and other anthropometric variables. Most breasts were ptotic (51%, 55%), especially the left breasts. Breast dimensions were asymmetrical in > 50% of subjects, where the left breasts were seen to have slightly greater breast dimensions than right. Conclusion: Breast values and related body size parameters were noted to be comparatively higher than earlier reported values mostly for the Asian population.