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Fig. 3 —Graph shows comparison of axillary staging strategies in
cost-effectiveness space. Efficiency frontier (dashed line) within
cost-effectiveness space shows diminishing marginal returns for higher-cost
strategies and shows weakly dominated strategy (sentinel lymph node [SLN]
biopsy) falling below frontier. Triangle indicates no treatment; square, MR
lymphangiography alone; x, SLN biopsy alone; diamond, combined MR
lymphangiography and SLN biopsy.