ABSTRACT Background: Musculoskeletal inflammatory lesions in chronic Chikungunya virus (CHIKV) infection have not been thoroughly assessed using whole-body magnetic resonance imaging (WBMRI). This study aimed to determine the prevalence of these lesions in such patients. Methods: From September 2018 to February 2019, patients with positive Chikungunya-specific serology (Immunoglobulin M/Immunoglobulin G anti-CHIKV), with a history of polyarthralgia for > 6 months prior to MRI with no pre-existing rheumatic disorders, underwent 3T WBMRI and localized MRI. The evaluation focused on musculoskeletal inflammatory lesions correlated with chronic CHIKV infection. Pain levels were assessed using a visual analogue scale on the same day as WBMRI. Results: The study included 86 patients of whom 26 met the inclusion criteria. All patients reported pain and most (92.3%) categorized it as moderate or severe. The most common finding across joints was effusion, particularly in the tibiotalar joint (57.7%) and bursitis, with the retrocalcaneal bursa most affected (48.0%). Tenosynovitis was prevalent in the flexor compartment of the hands (44.2%), while Kager fat pad and soleus edema were also observed. Bone marrow edema-like signals were frequently seen in the sacroiliac joints (19.2%). Most WBMRI findings were classified as mild. Conclusions: This study represents the first utilization of 3T WBMRI to assess musculoskeletal inflammatory disorders in chronic CHIKV infection. The aim was to identify the most affected joints and prevalent lesions, providing valuable insights for future research and clinical management of this condition regarding understanding disease pathophysiology, developing targeted treatment strategies, and using advanced imaging techniques in the assessment of musculoskeletal manifestations. Background (CHIKV wholebody whole body . (WBMRI) Methods 201 2019 Chikungunyaspecific specific Immunoglobulin MImmunoglobulin M antiCHIKV, antiCHIKV anti , anti-CHIKV) preexisting pre existing T Results 8 2 criteria 92.3% 923 92 3 (92.3% severe effusion 57.7% 577 57 7 (57.7% bursitis 48.0%. 480 48.0% 48 0 (48.0%) 44.2%, 442 44.2% 44 (44.2%) observed edemalike like 19.2%. 192 19.2% 19 (19.2%) mild Conclusions pathophysiology strategies manifestations (WBMRI 20 anti-CHIKV 92.3 9 (92.3 57.7 5 (57.7 48.0 4 (48.0% 44.2 (44.2% 19.2 1 (19.2% 92. (92. 57. (57. 48. (48.0 44. (44.2 19. (19.2 (92 (57 (48. (44. (19. (9 (5 (48 (44 (19 ( (4 (1