20.500.12556/RUL-178689 Epidural metalloma 12 years after spinal fusion for adolescent idiopathic scoliosis a case report Introduction The occurrence of metallosis after spine surgery is a rare phenomenon. The accumulation and deposition of metallic nanoparticles, especially cobalt and chromium, elicit a local inflammatory response by modulating the expression of cytokines, ultimately manifesting as a pseudotumor. This process is considered an aseptic lymphocyte-dominated vasculitis-associated lesion or adverse local tissue reaction (ALTR). Methods We present a case of metalloma that developed 12 years after surgery for adolescent idiopathic scoliosis (AIS). Results After a piecemeal decompression of the pseudocyst, additional internal fixation instrumentation, and a pseudarthrosis revision with bone transplantation, the patient regained all prior flexibility and remained pain free. Conclusion We speculate that the proposed mechanism of instrumentation failure in our patient was over-aggressive postoperative exercise with pseudoarthrosis and metal-on-metal corrosion, leading to ALTR in the spinal canal. scoliosis pseudoarthrosis corrosion neoplasms return to sport skolioza psevdoartroza korozija neoplazme true false true Angleški jezik Slovenski jezik Članek v reviji 2026-01-29 12:21:22 2026-01-29 12:21:22 2026-01-31 04:06:03 0000-00-00 00:00:00 2025 0 0 Str. 1585–1588 iss. 9 Vol. 59 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 617.3 0019-5413 10.1007/s43465-025-01425-2 238033411 s43465-025-01425-2.pdf s43465-025-01425-2.pdf 1 10ECBE8565FDDA5879E3916DD2062C05 44f13bdc660bf27f8b595917ec8096c78fa36e4e97ac1b29582d61ff949c6e0f d0f4493f-fd04-11f0-a1ba-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=226634 https://link.springer.com/article/10.1007/s43465-025-01425-2 0 c776aecf-fd04-11f0-a1ba-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=226633 Medicinska fakulteta 0 0 0