Abstract
Objective Lymphedema of the upper limb is the most common complication in patients with breast
cancer, who require axillary lymph node (LN) dissection. Proposition of identifying
upper limb draining LN and preserving it, during axillary dissection can reduce significant
postoperative morbidity, but it has the risk of inadequate oncological resection.
This study was planned to find out metastatic rate in axillary reverse mapping (ARM)
nodes in our population.
Materials and Methods Lymphoscintigraphy (LSG) was performed using intradermal injection of 99mTc Sulfur Colloid into ipsilateral second and third interdigital web spaces of hand
in patients with breast cancer. Planar, single-photon emission computed tomography-computed
tomography images were acquired followed by intraoperative localization of arm draining
LNs using Gamma Probe. All identified ARM nodes were dissected and sent for histopathological
examination to confirm metastatic involvement.
Results Twenty eligible patients were prospectively analyzed. The identification rate of
arm draining LN with LSG was 90% (18/20). Among 14 eligible patients included in the
study, ARM node metastasis was seen in two patients. A total of 64 ARM nodes were
dissected from 14 patients, 4/64 nodes (2 patients) were positive for metastases (6.25%).
Of the six patients excluded from the study, in 1 patient ARM node could not be identified
on Gamma Probe, in two cases, it could not be retrieved surgically, in next two cases
ARM could not be identified on LSG and remaining one case was removed because of previous
surgical intervention.
Conclusion In the current study, LSG showed the identification rate of 90% for ARM nodes in
patients with carcinoma breast and metastatic involvement was seen in 6.25% (4/64)
of these nodes in 2/14 (14.2%) patients, which is in agreement with previously published
data. Oncological safety of preserving ARM nodes needs to be evaluated in the larger
population.
Keywords
axillary lymph node dissection - axillary reverse mapping - breast cancer - lymphedema
- lymphoscintigraphy - sentinel lymph node