Classical treatment of compound depressed skull fractures includes debridement and closure of all scalp wounds to minimize the risk of delayed intracranial infection. In selected situations, a nonsurgical approach may prove to be equally safe. Over a 33-month period, we evaluated 1075 patients for head trauma. There were 63 patients with non-missile, compound depressed skull fractures (9 of these 63 patients have been excluded for deaths that occurred within 4 days of admission). Patients with significant intracranial hematomas or dural violations over the convexity of the brain underwent formal surgical therapy. Surgical therapy was performed on 28 patients (52%; age 33 +/- 3 years; ISS 24 +/- 2) and it consisted of craniotomy with debridement, elevation of depressed fragments, repair of dural tears, and evacuation of hematomas. Nonsurgical treatment was used if there was no evidence of violation of the dura mater and of significant intracranial hematoma. If the following criteria were satisfied, then the nonsurgical approach was employed: no evidence of exposed brain or a cerebrospinal fluid leak, no pneumocephalus related to the fracture, no depressed fragments of bone more than 1 cm below the inner table of the skull, and no gross wound contamination. Nonsurgical therapy was used on 26 patients (48%; age 34 +/- 3 years; ISS 19 +/- 2) and it consisted of wound irrigation, debridement, and closure. In all 54 patients of both subsets of patients, intravenous antibiotics were administered for 5 to 7 days. After two additional days of observation, off antibiotics, the patients were discharged. There were no infectious complications related to the central nervous system.(ABSTRACT TRUNCATED AT 250 WORDS)