Benign ossified plaque of the cranial arachnoid.
D001099:Arachnoid; D006801:Humans; D008297:Male; D008578:Meninges / Q000473:pathology* / Q000601:surgery; D008875:Middle Aged; D009999:Ossification, Heterotopic / Q000473:pathology* / Q000601:surgery; D012886:Skull