EUS-guided biopsy for the diagnosis and classification of lymphoma - 22/08/11
Reprint requests: Afonso Ribeiro, MD, Associate Professor of Medicine, Division of Gastroenterology, University of Miami School of Medicine, PO Box 016960, Miami, FL 33101Résumé |
Background |
EUS-guided FNA and Tru-cut biopsy (TCB) is highly accurate in the diagnosis of lymphoma. Subclassification, however, may be difficult in low-grade non-Hodgkin lymphoma and Hodgkin lymphoma.
Objective |
To determine the yield of EUS-guided biopsy to classify lymphoma based on the World Health Organization classification of tumors of hematopoietic lymphoid tissues.
Design |
Retrospective study.
Setting |
Tertiary referral center.
Patients |
A total of 24 patients referred for EUS-guided biopsy who had a final diagnosis of lymphoma or “highly suspicious for lymphoma.”
Interventions |
EUS-guided FNA and TCB combined with flow cytometry (FC) analysis.
Main Outcomes Measurement |
Lymphoma subclassification accuracy of EUS guided biopsy.
Results |
Twenty-four patients were included in this study. Twenty-three patients underwent EUS-FNA, and 1 patient had only TCB. Twenty-two underwent EUS-TCB combined with FNA. EUS correctly diagnosed lymphoma in 19 out of 24 patients (79%), and subclassification was determined in 16 patients (66.6%). Flow cytometry correctly identified B-cell monoclonality in 95% (18 out of 19). In 1 patient diagnosed as having marginal-zone lymphoma by EUS-FNA/FC only, the diagnosis was changed to hairy cell leukemia after a bone marrow biopsy was obtained. EUS had a lower yield in nonlarge B-cell lymphoma (only 9 out of 15 cases [60%]) compared with large B-cell lymphoma (78%; P = .3 [Fisher exact test]).
Limitations |
Retrospective, small number of patients.
Conclusion |
EUS-guided biopsy has a lower yield to correctly classify Hodgkin lymphoma and low-grade lymphoma compared with high-grade diffuse large B-cell lymphoma.
Le texte complet de cet article est disponible en PDF.Abbreviations : FC, PET, TCB, WHO
Plan
| DISCLOSURE:All authors disclosed no financial relationships relevant to this publication. |
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| If you would like to chat with an author of this article, you may contact Dr. Ribeiro at aribeiro@med.miami.edu. |
Vol 71 - N° 4
P. 851-855 - avril 2010 Retour au numéro
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