Document Detail

Patterns of contrast enhancement of tuberculous lymph nodes demonstrated by computed tomography.
MedLine Citation:
PMID:  1643775     Owner:  NLM     Status:  MEDLINE    
The purpose of this study was to evaluate the contrast-enhanced CT characteristics of pathologic thoraco-abdominal lymph nodes in 38 patients infected with Mycobacterium tuberculosis (30 without AIDS and eight with AIDS). Unenhanced scans of chest, abdomen and pelvis were also done in all cases. The CT attenuation values and the enhancement characteristics of the largest node or group of lymph nodes were evaluated in a dynamic sequence over a period of 10 min. On unenhanced CT the nodes were of low attenuation (less than 30 HU) in 18 cases and of soft tissue attenuation (greater than 35 HU) in 20 cases. Four post-contrast patterns of enhancement were found: (i) peripheral rim enhancement (n = 22); (ii) inhomogeneous enhancement (n = 8); (iii) homogeneous enhancement (n = 6); and (iv) homogeneous nonenhancing nodes (n = 2). Increase of attenuation and obliteration of perinodal fat was found in 13 cases, most of them with the peripheral rim enhancement pattern. Seven cases had a combination of enhancing patterns in the same nodal group. The central enhancement was usually moderate (mean, 30 HU) but was marked (greater than 60 HU) in three patients with the homogeneous enhancement pattern. Neither the nodal attenuation values nor the patterns of enhancement are characteristic of tuberculosis, however adenopathy showing peripheral rim-enhancement with relative low attenuation centres can suggest a diagnosis of tuberculosis in the appropriate clinical setting.
F Pombo; E Rodríguez; J Mato; J Pérez-Fontán; E Rivera; L Valvuena
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Clinical radiology     Volume:  46     ISSN:  0009-9260     ISO Abbreviation:  Clin Radiol     Publication Date:  1992 Jul 
Date Detail:
Created Date:  1992-09-08     Completed Date:  1992-09-08     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  1306016     Medline TA:  Clin Radiol     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  13-7     Citation Subset:  IM    
Department of Radiology, Hospital Juan Canalejo, La Coruña, Spain.
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MeSH Terms
Lymph Nodes / pathology,  radiography
Mediastinum / radiography
Middle Aged
Mycobacterium tuberculosis / isolation & purification
Pelvis / radiography
Prospective Studies
Radiography, Abdominal
Tomography, X-Ray Computed*
Tuberculosis, Lymph Node / pathology,  radiography*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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