A button sequestrum is a small sequestrum of devascularised bone surrounded by lucency. Although classically described in osteomyelitis and eosinophilic granuloma it is also occasionally seen in fibrosarcoma and lymphoma.
- 1. Krasnokutsky Michael V. “The Button Sequestrum Sign1.” Radiology 236, no. 3 (2005): 1026-1027. doi:10.1148/radiol.2363031294.