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Background 18-F-2-Deoxy-D-Glucose Positron Emission Tomography [FDG-PET], combined with multidetector helical Computed Tomography [PET/CT] has emerged as a one of the most important prognostic tools for lymphoma management. Previous studies have indicated that PET/CT is a convenient method for bone marrow assessment in patients with lymphoma. A blind Bone Marrow Biopsy [BMB] has been traditionally used as the golden standard in marrow evaluation despite its invasiveness. Objective is to compare the results of PET/CT with BMB regarding bone marrow infiltration [BMI] in patients with Hodgkin's Lymphoma [HL] and Non-Hodgkin's Lymphoma [NHL] and to characterize the visual bone marrow FDG uptake pattern by PET-CT Methods A cross sectional study including 27 cases of Lymphoma, conducted at Ain Shams University hospitals, the patients were investigated using PET-CT scan and BMB ,the period was between December 2018 till the end of May 2019. Results Our study included 27 histologically proved Lymphoma patients, 14 (51.9%) were males and 13 (48.1%) were females, with age ranging from 17 to 69 years (mean 45 years). Among the total cases, 17 (63%) patients had NHL, while 10 (37%) patients had HL. All the patients were evaluated at first by BMB (taken from the dorsal portion of the iliac crest) for initial staging, then the patients underwent PET/CT scan. The study revealed 12 patients (44.4%) had BMI detected by PET/CT imaging; however, only 7 patients (25.9%) were detected by BMB. BMB and 18F-FDG PET/CT scans were concordant for BMI detection in 22 patients (81.5%): positive concordance in 7 patients and negative in 15. Of the 5 discordant cases, four had a focal marrow intense FDG uptake detected by PET/CT and were upstaged as their BMB results were false-negative, one patient had intense diffuse marrow uptake by PET/CT while its BMB was negative (revealed only hyper cellularity with mild dysplasia). The sensitivity, specificity, PPV, and NPV of PET for identifying BMI was 100%, 75%, 58.3%, 100% respectively with a diagnostic accuracy 81.5% with a (p value &amp;lt; 0.05). Conclusion 18F-FDG PET-CT imaging is more sensitive than bone marrow biopsy for bone marrow infiltration detection in Hodgkin's Lymphoma and Non-Hodgkin's Lymphoma staging.

Assessment of the role of 18F-FDG PET CT in detection of bone marrow infiltration in comparison to the Bone Marrow Aspirate in Lymphoma patients