Evaluation of pelvic anthropometry measurements in rectal cancer patients

Colorectal cancer is the third leading cause of cancer worldwide, with rectal cancer accounting for 40% of cases. Rectal and pelvic measurements are an important factor in surgical interventions. In this study, we aimed to increase the success of the surgical process by determining the pelvic distance values according to gender in rectal cancer and healthy individuals. 114 females (57 female patients and 57 control group females) and 114 males (57 male patients and 57 control group males) aged 18-90 years were retrospectively evaluated. Measurements were taken from the computed tomography images of the individuals with Sectra IDS7 application. Statistical analyses were performed using IBM SPSS Statistics 26.0 for Windows (New York; USA). Pelvic inlet, mid pelvis and pelvic outlet were found to be larger in healthy female than in healthy male. Conjugata diagonalis and right diamater obliqua were statistically larger in female and male control groups than in female and male patient groups (p<0.05). In female rectal cancer patients; diamater transversa, right and left diamater obliqua values at pelvic inlet, interspinous diameter in the mid pelvis, and all diameters evaluated at pelvic outlet were found to be larger than male rectal cancer patients. The sagittal diameter of the middle pelvis, the distance between the promontorium-S3/S4 and the distance between the coccygis-S3/S4 were found to be larger in male rectal cancer patients compared to female patients (p<0.05). In conclusion, we suggest that pelvic anthropometry values of patients with rectal cancer of both sexes have a significant effect on factors such as operative time and degree of difficulty in surgical applications and that anatomical differences in the pelvis may affect surgical success.