title: Functional diagnosis of residual lymphomas after radiochemotherapy with positron emission tomography comparing FDG- and FLT-PET.
abstract: Positron emission tomography (PET) using 2-deoxy-2-[(18)F]fluoro-D-glucose (FDG) is used as a functional imaging technique for the staging and follow-up of lymphomas. However, additional information about the tumor proliferation rate using 3'-deoxy-3'-[(18)F]fluorothymidine (FLT) may be useful for the assessment of prognosis. We enrolled 48 patients with Hodgkin's (n = 15) and non-Hodgkin's lymphoma (n = 33) with residual masses >2 cm examined by tracer studies with FDG and FLT. The results were related to median overall and progression-free survival. In 15 out of 48 patients analysed using FDG, positive results were found. Using FLT, 10 out of 48 patients were positive. 33 patients were FDG negative. Eight patients were positive both using FDG and FLT. Overall survival for patients with a negative PET scan was significantly higher than for patients with positive PET, irrespective of the tracer used. FLT alone was able to discriminate between patients with long or short overall survival. However, there was no statistical significance comparing FDG/FLT negative versus FDG negative alone. Although FDG detected more lesions than did FLT, the additional biological characterization of tumor tissue with respect to proliferation by FLT might be useful by providing complementary information for the identification of recurrence. However, the present data show no advantage of combined FDG/FLT studies over FDG alone with respect to the prediction of survival.
authors: Department of Internal Medicine V, University of Heidelberg, Im Neuenheimer Feld 410, D-69120 Heidelberg, Germany. mail@berndkasper.de
authors: Bernd
authors: B
authors: Kasper
authors: Gerlinde
authors: G
authors: Egerer
authors: Martina
authors: M
authors: Gronkowski
authors: Sabine
authors: S
authors: Haufe
authors: Thomas
authors: T
authors: Lehnert
authors: Michael
authors: M
authors: Eisenhut
authors: Gunhild
authors: G
authors: Mechtersheimer
authors: Anthony D
authors: AD
authors: Ho
authors: Uwe
authors: U
authors: Haberkorn
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D003131:Combined Modality Therapy; D015224:Dideoxynucleosides; D018572:Disease-Free Survival; D005260:Female; D019788:Fluorodeoxyglucose F18; D006801:Humans; D008223:Lymphoma / Q000175:diagnosis* / Q000000981:diagnostic imaging* / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D018365:Neoplasm, Residual / Q000175:diagnosis* / Q000000981:diagnostic imaging* / Q000473:pathology*; D049268:Positron-Emission Tomography / Q000379:methods; D011379:Prognosis; D011446:Prospective Studies; D019275:Radiopharmaceuticals
chemical_list: D015224:Dideoxynucleosides; D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18; C002854:alovudine