Detection rate of periintestinal lymph nodes

Area of Science:

• Gastroenterology
• Surgical Pathology
• Medical Imaging

Background:

• Standard two-dimensional (2D) endosonography offers limited imaging of the gastrointestinal (G-I) tract and metastatic lymph node detection.
• Three-dimensional (3D) endosonography presents a potential advancement in G-I tract imaging and nodal staging.

Purpose of the Study:

• To assess the effectiveness of 3D endosonography in identifying periintestinal lymph nodes within surgical specimens.
• To compare the diagnostic performance of 3D endosonography against histological analysis for lymph node detection and metastasis.

Main Methods:

• Surgical specimens from 31 patients with G-I malignancies were examined using 3D endosonography and subsequent histology.
• Lymph nodes were identified, and their positions and sizes were documented on specimen photographs by pathologists and examiners.
• Specimens were scanned underwater to optimize imaging quality.

Main Results:

• 3D endosonography detected 80.0% of malignant lymph nodes and 50.2% of benign lymph nodes.
• The positive predictive value for identifying a lymph node via endosonography was 0.97.
• Detection rates for periintestinal lymph nodes were notably high.

Conclusions:

• 3D endosonography demonstrated superior detection rates for periintestinal lymph nodes compared to 2D endosonography.
• While differentiating metastatic from non-metastatic nodes remains challenging, 3D endosonography successfully identified all patients with confirmed lymph node metastasis.
• The technique is considered suitable for pre-operative patient stratification.