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In Vitro High-Resolution Helical CT of Small Axillary Lymph Nodes in Patients with Breast Cancer

Correlation of CT and Histology

Takayoshi Uematsu1, Muneaki Sano2 and Keiichi Homma3

1 Department of Radiology, Niigata Cancer Center Hospital, 2-15-3, Niigatashi, Kawagishicho, Niigata 951-8566, Japan.
2 Department of Surgery, Niigata Cancer Center Hospital, Niigata 951-8566, Japan.
3 Department of Pathology, Niigata Cancer Center Hospital, Niigata 951-8566, Japan.



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  		Fig. 1. —Photograph shows partitioned case filled with saline. Lymph nodes are put into case and numbered.

 


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  		Fig. 2A. —Acrylic beads and small acrylic bead bath. Photograph shows commercially available acrylic beads about 4 mm in diameter.

 


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  		Fig. 2B. —Acrylic beads and small acrylic bead bath. Drawing shows small bath of acrylic beads (white) with lymph nodes (black) inserted.

 


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  		Fig. 3. —Drawing shows cortical rim morphology on high-resolution helical CT. From top to bottom: normal cortex (<2 mm), concentric cortex (>=2 mm), eccentric cortex, and irregular cortex.

 


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  		Fig. 4A. —Normal benign lymph node from breast of 40-year-old woman. In vitro high-resolution helical CT scan shows high-density C-shaped rim around central low-density hilum.

 


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  		Fig. 4B. —Normal benign lymph node from breast of 40-year-old woman. Histologic section shows C-shaped lymphoid tissue and central fatty tissue. (H and E, x 1)

 


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  		Fig. 5. —Malignant lymph node with irregular cortical rim from breast of 46-year-old woman. In vitro high-resolution helical CT scan shows irregular high-density cortex.

 


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  		Fig. 6. —Benign lymph node with wide concentric cortical rim from breast of 78-year-old woman. In vitro high-resolution helical CT scan shows concentric cortical widening.

 


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  		Fig. 7A. —Malignant lymph node with eccentric cortical rim thickening from breast of 48-year-old woman. In vitro high-resolution helical CT scan shows focal cortical widening.

 


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  		Fig. 7B. —Malignant lymph node with eccentric cortical rim thickening from breast of 48-year-old woman. Histologic section shows eccentric peripheral metastatic lesion (arrow). (H and E, x 1)

 

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