Gallium-67 is a group IIIA metal which has proved its usefulness in the search for progressive inflammatory foci. This exam allows you to: - Diagnosis of bone, joint or disc infections. Gallium citrate should be preferred over labeled leukocytes for the diagnosis of spondylodiscitis; - diagnosis, evaluation and follow-up of inflammatory granulomatous pathologies such as sarcoidosis; - diagnosis of renal involvement of certain chronic inflammatory diseases, such as systemic lupus erythematosus; - localization of pulmonary and / or mediastinal, inflammatory and / or infectious pathologies in immunocompromised patients; - long-term fever assessment in adults; - diagnosis of toxo-allergic interstitial nephritis and distinction from acute tubular necrosis