PT  - JOURNAL ARTICLE
AU  - Michal Weiler-Sagie
AU  - Olga Bushelev
AU  - Ron Epelbaum
AU  - Eldad J. Dann
AU  - Nissim Haim
AU  - Irit Avivi
AU  - Ayelet Ben-Barak
AU  - Yehudit Ben-Arie
AU  - Rachel Bar-Shalom
AU  - Ora Israel
TI  - <sup>18</sup>F-FDG Avidity in Lymphoma Readdressed: A Study of 766 Patients
AID  - 10.2967/jnumed.109.067892
DP  - 2010 Jan 01
TA  - Journal of Nuclear Medicine
PG  - 25--30
VI  - 51
IP  - 1
4099  - http://jnm.snmjournals.org/content/51/1/25.short
4100  - http://jnm.snmjournals.org/content/51/1/25.full
SO  - J Nucl Med2010 Jan 01; 51
AB  - PET/CT with 18F-FDG is an important noninvasive diagnostic tool for management of patients with lymphoma, and its use may surpass current guideline recommendations. The aim of the present study is to enlarge the growing body of evidence concerning 18F-FDG avidity of lymphoma to provide a basis for future guidelines. Methods: The reports from 18F-FDG PET/CT studies performed in a single center for staging of 1,093 patients with newly diagnosed Hodgkin disease and non-Hodgkin lymphoma between 2001 and 2008 were reviewed for the presence of 18F-FDG avidity. Of these patients, 766 patients with a histopathologic diagnosis verified according to the World Health Organization classification were included in the final analysis. 18F-FDG avidity was defined as the presence of at least 1 focus of 18F-FDG uptake reported as a disease site. Nonavidity was defined as disease proven by clinical examination, conventional imaging modalities, and histopathology with no 18F-FDG uptake in any of the involved sites. Results: At least one 18F-FDG–avid lymphoma site was reported for 718 patient studies (94%). Forty-eight patients (6%) had lymphoma not avid for 18F-FDG. 18F-FDG avidity was found in all patients (100%) with Hodgkin disease (n = 233), Burkitt lymphoma (n = 18), mantle cell lymphoma (n = 14), nodal marginal zone lymphoma (n = 8), and lymphoblastic lymphoma (n = 6). An 18F-FDG avidity of 97% was found in patients with diffuse large B-cell lymphoma (216/222), 95% for follicular lymphoma (133/140), 85% for T-cell lymphoma (34/40), 83% for small lymphocytic lymphoma (24/29), and 55% for extranodal marginal zone lymphoma (29/53). Conclusion: The present study indicated that with the exception of extranodal marginal zone lymphoma and small lymphocytic lymphoma, most lymphoma subtypes have high 18F-FDG avidity. The cumulating evidence consistently showing high 18F-FDG avidity in the potentially curable Burkitt, natural killer/T-cell, and anaplastic large T-cell lymphoma subtypes justifies further investigations of the utility of 18F-FDG PET in these diseases at presentation.