Indocyanine green lymphangiography is superior to clinical staging in breast cancer-related lymphedema

Mads Gustaf Jørgensen, Anne Pernille Hermann, Anette Riis Madsen, Steffanie Christensen, Jens Ahm Sørensen, Mads Gustaf Jørgensen, Anne Pernille Hermann, Anette Riis Madsen, Steffanie Christensen, Jens Ahm Sørensen

Abstract

Precise staging of breast cancer-related lymphedema (BCRL) is important to guide treatment-decision making. Recent studies have suggested staging of BCRL using indocyanine green lymphangiography (ICG-L) based on the extent of lymphatic injury and dermal backflow patterns. Currently, the benefits of ICG-L compared to conventional clinical staging are unknown. For this study, we included 200 patients with unilateral BCRL. All BCRL patients were staged using ICG-L and clinical exam. The amounts of excess arm volume, fat mass and lean mass were compared between stages using Dual Energy X-Ray Absorptiometry. Multivariate regression models were used to adjust for confounders. For each increase in the patient's ICG-L stage, the excess arm volume, fat mass and lean mass was increased by 8, 12 and 6.5 percentage points respectively (P < 0.001). For each increase in the patient's clinical ISL stage, the volume was increased by 3.5 percentage points (P < 0.05), however no statistically significant difference in the lean and fat mass content of the arm was observed for ascending stages. However, the residual plots showed a high degree of variance for both ICG-L and clinical staging. This study found that ICG-L staging of BCRL was superior to clinical staging in forecasting BCRL excess arm volume, fat mass, and lean mass. However, there was a high degree of variance in excess arm volume, fat mass, and lean mass within each staging system, and neither the ICG-L nor clinical staging forecasted perfectly.

Conflict of interest statement

The authors declare no competing interests.

© 2021. The Author(s).

Figures

Figure 1
Figure 1
This figure shows the flowchart of the include patients.
Figure 2
Figure 2
This figure shows the distribution of excess arm volume, fat and lean mass in lymphedema patients stratified by clinical ISL and lymphangiography staging. (A) Excess volume and ISL stage. (B) Excess volume and ICG stages. (C) Excess fat mass and ISL stage (D) Excess fat ass and ICG stages. (E) Excess lean mass and ISL stage (F) Excess lean mass and ICG stages. Black horizontal dotted lines denote 25%, 50%, and 75%. The red striped line denotes the mean excess volume, fat and lean mass for the study. *P-value < 0.05. **P-value < 0.001.
Figure 3
Figure 3
This figure shows the residuals of predicted minus observed excess volume, fat, and lean mass by (A) ISL stage and (B) ICG stage.

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Source: PubMed

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