Table 2

Sentinel lymph node biopsy variables

VariableGlobal cohort (n=84)Tc-99m-MB (n=49)Tc-99m-ICG (n=35)P value
SLN drainage, per patient (n (%))0.092*
 Absence6 (7.1)3 (6.1)3 (8.6)
 Unilateral pelvic26 (31.0)19 (38.8)7 (20.0)
 Unilateral pelvic + aortic6 (7.1)5 (10.2)1 (2.9)
 Bilateral pelvic41 (48.8)18 (36.7)23 (65.7)
 Bilateral pelvic + aortic3 (3.6)2 (4.1)1 (2.9)
 Aortic2 (2.4)2 (4.1)0 (0.0)
Overall detection rate (% (95% CI))92.9 (85.1 to 97.3)93.9 (83.1 to 98.7)91.4 (76.9 to 98.1)0.690*
Bilateral detection rate (% (95% CI))52.4 (41.2 to 63.4)40.8 (27.0 to 55.8)68.6 (50.7 to 83.1)0.012†
Aortic mapping (% (95% CI))13.1 (6.7 to 22.2)18.4 (8.8 to 32.0)5.7 (0.7 to 19.2)0.111*
SLN per patient (median (IQR))2 (1–3)2 (1–3)3 (2–4)0.170‡
SLN status per patient (n (%))0.143*
 Negative73 (86.9)41 (83.7)32 (91.4)
 Positive5 (6.0)5 (10.2)0 (0.0)
 No drainage6 (7.1)3 (6.1)3 (8.6)
Empty node packets (empty packets/total nodes per group) (% (95% CI))4/212 (1.9, 0.5 to 4.7)0/113 (0.0)4/99 (4.0, 1.1 to 10.0)0.032§
  • *Fisher exact test.

  • †Chi-square test.

  • ‡Mann-Withney U test

  • §z-test for proportions

  • ICG, indocyanine green; MB, methylene blue; SLN, sentinel lymph node; Tc, technetium.