Static and Dynamic Imbalance in Patients with Breast Cancer-Related Lymphedema.

Background: Breast cancer-related lymphedema (BCRL) was associated with postural imbalance, but the immature knowledge introduced debate about which component of the balance was affected by BCRL in the literature. The aim of this study was to determine the static and dynamic balance of patients with BCRL in comparison with healthy subjects.Methods and Results: This case-control designed study recruited 30 BCRL patients and 30 healthy individuals. The demographic and clinical variables of the subjects were recorded. The static balance stability parameters on four conditions (eyes opened-stable ground, eyes closed-stable ground, eyes opened-unstable ground, eyes closed-unstable ground) and dynamic stability of all participants were evaluated. The values of both stable ground conditions were similar between the groups (p < 0.05). However, values of both eyes opened-unstable ground (p = 0.032) and eyes closed-unstable ground (p = 0.034) conditions were significantly impaired in BCRL in comparison with controls. Besides, comparison of sway area of the opened versus closed eyes conditions on unstable ground (p = 0.036), and movement speed while correcting the center of pressure on unstable ground (with opened and closed eyes, p = 0.014 and p = 0.004 respectively) revealed increased values in the BCRL group. Likewise, the dynamic stability was significantly disrupted in the BCRL group (p = 0.043).Conclusion: Closing eyes did not affect the postural balance in patients with BCRL, whereas the deterioration of ground altered the balance significantly in the BCRL group compared with healthy subjects. We suggest the inclusion of balance exercises and guidance for selection of correct shoes and insoles in routine lymphedema rehabilitation program.