The MEDUNSA sign.
Copley
I B
IB
D001922:Brain Abscess / Q000000981:diagnostic imaging* / Q000601:surgery; D020197:Head Injuries, Penetrating / Q000000981:diagnostic imaging* / Q000601:surgery; D006801:Humans; D012887:Skull Fractures / Q000000981:diagnostic imaging* / Q000601:surgery; D013019:South Africa; D014057:Tomography, X-Ray Computed; D014948:Wounds, Gunshot / Q000000981:diagnostic imaging* / Q000601:surgery