Article

Cervical lymph nodes with or without metastases from oral squamous carcinoma: a correlation of MRI findings and histopathologic architecture.

Section of Image Diagnostics, Department of Diagnostics and General Care, Fukuoka Dental College, Fukuoka, Japan.
Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics (impact factor: 1.5). 03/2010; 109(6):890-9. DOI:10.1016/j.tripleo.2009.12.007 pp.890-9
Source: PubMed

ABSTRACT The aim of this study was to describe the magnetic resonance images (MRIs) of the architecture of metastatic lymph nodes as well as healthy lymph nodes and to correlate the images with the histopathologic architecture of the lymph nodes from oral squamous cell carcinoma.
The signal intensities of 98 cervical lymph nodes from 20 patients with oral squamous cell carcinoma were evaluated on T2-weighted and diffusion-weighted whole-body imaging with background body signal suppression (DWIBS). The MRI findings were compared with the histopathologic architecture.
On T2-weighted images, very hyperintense and/or isointense areas were specific findings for lymph nodes containing metastases from oral squamous cell carcinoma. Histopathology indicated that these areas corresponded to cystic degeneration or keratinization. Using DWIBS images with inverted black-and-white image contrast, cystic degeneration, keratinization, fibrous tissue, tumor tissue, and lymphoid tissue were either hypointense or intermediate in intensity.
On T2-weighted images, very hyperintense and/or isointense areas were characteristic findings for lymph nodes containing metastases from oral squamous cell carcinoma. This suggests cystic degeneration or keratinization within the affected lymph nodes. Using DWIBS images, it was difficult to differentiate metastatic from benign lymph nodes.

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Keywords

98 cervical lymph nodes
 
affected lymph nodes
 
areas corresponded
 
background body signal suppression
 
benign lymph nodes
 
cystic degeneration
 
differentiate metastatic
 
DWIBS images
 
fibrous tissue
 
healthy lymph nodes
 
histopathologic architecture
 
inverted black-and-white image contrast
 
isointense areas
 
lymph nodes
 
lymphoid tissue
 
magnetic resonance images
 
metastatic lymph nodes
 
suggests cystic degeneration
 
T2-weighted images
 
tumor tissue