TY - JOUR T1 - An Unusual Cause of Lower Back Pain JF - The Journal of Rheumatology JO - J Rheumatol SP - 2556 LP - 2556 DO - 10.3899/jrheum.090498 VL - 36 IS - 11 AU - OLGA PETRYNA AU - PETROS EFTHIMIOU Y1 - 2009/11/01 UR - http://www.jrheum.org/content/36/11/2556.abstract N2 - Silicone products, in their solid form, have long been used for cosmetic applications within the body and are thought to be well tolerated, the most frequent complications being occasional sensitivity and encapsulation. In contrast, silicone oil injections may cause granulomas, stimulating the formation of an inflammatory nidus and promoting macrophage activation and migration. In the case of injection of so-called industrial silicone not approved for medical uses, complications may … ER -