Base of skull fracture comes up a lot in the CICM Fellowship exam. Usually, the question will show you some racoon eyes or a bruised mastoid, and then ask what other problems might be associated with a base of skull fracture. Usually, it has been Battle's sign (named after Dr William Henry Battle, rather than any association with warfare) which apparently has a 100% positive predictive value for base of skull fracture.
Questions involving BOSF thus far:
A 1998 meta-analysis had concluded that "antibiotic prophylaxis after basilar skull fractures does not appear to decrease the risk of meningitis." This conclusion was supported by a 2011 Cochrane review. Nobody does this any more, and the college probably won't ask about it again.
Pretto, Flores L., C. S. De Almeida, and L. A. Casulari. "Positive predictive values of selected clinical signs associated with skull base fractures." Journal of neurosurgical sciences 44.2 (2000): 77-82.
Tubbs, R. Shane, et al. "William Henry Battle and Battle's sign: mastoid ecchymosis as an indicator of basilar skull fracture: Historical vignette." Journal of neurosurgery 112.1 (2010): 186-188.
Katzen, J. Timothy, et al. "Craniofacial and skull base trauma." Journal of Trauma and Acute Care Surgery 54.5 (2003): 1026-1034.
Samii, Madjid, and Marcos Tatagiba. "Skull base trauma: diagnosis and management." Neurological research 24.2 (2002): 147-156.
Villalobos, Tibisay, et al. "Antibiotic prophylaxis after basilar skull fractures: a meta-analysis." Clinical infectious diseases 27.2 (1998): 364-365.
Ratilal, Bernardo O., et al. "Antibiotic prophylaxis for preventing meningitis in patients with basilar skull fractures." Cochrane Database Syst Rev 8 (2011).
Scholsem, Martin, et al. "Surgical management of anterior cranial base fractures with cerebrospinal fluid fistulae: a single‐institution experience." Neurosurgery 62.2 (2008): 463-471.