[Subdural empyema].

Subdural empyema is a rare, but severe complication after skull-brain trauma and/or sinusitis. On the basis of four of our own cases the symptomatology, diagnostic problems and therapeutical management are discussed. Therapy should be an enlarged burr-hole trepanation or--if thick membranes develop--craniotomy and drainage of the empyema cavity. The use of modern CNS-penetrating antibiotics has canaed previously high mortality to decrease impressively.