Video-assisted breast surgery and sentinel lymph node biopsy guided by three-dimensional computed tomographic lymphography.

BACKGROUND

Video-assisted breast surgery (VABS) is a less invasive and aesthetically better option for benign and malignant breast diseases and for sentinel lymph node biopsy (SLNB). The authors have performed 150 VABS procedures since December 2001. They have examined the usefulness of three-dimensional computed tomographic (3D-CT) lymphography for detecting sentinel lymph nodes (SLNs) precisely, as well as the cosmetic and treatment results of VABS.

METHODS

In this study, VABS was performed with a 2.5-cm skin incision in the axilla or periareola (1 cm in the axilla for SLNB), using a retraction method, for mammary gland resection, SLNB, axillary lymph node dissection, and breast reconstruction under video assistance. On the day before the surgery, 3D-CT lymphography was performed to mark SLN on the skin. Above the tumor and near the areola, 2 ml of Iopamiron 300 was injected subcutaneously. A 16-channnel multidetector-row helical CT scan image was taken after 1 min and reconstructed to produce a 3D image. Sentinel lymph node biopsy was performed by the VABS technique using the Visiport.

RESULTS

The VABS procedure was performed for 19 benign and 131 malignant diseases, and 115 SLNBs (74 with 3D-CT) were performed. The SLNs were shown precisely by 3D-CT lymphography, as proved by a case of lymph node metastasis, in which accurate relationships between lymph ducts and SLNs were shown. These were classified into four patterns: a single duct to single node (40 cases), multiple ducts to a single node (13 cases), a single duct to multiple nodes (1 case), and multiple ducts to multiple nodes (12 cases). The SLNB procedure can be performed safely by 3D-CT lymphography and less invasively by VABS.

CONCLUSIONS

The findings show that 3D-CT lymphography is useful for performing precise SLNB using VABS.