Skull base osteomyelitis in patients with head and neck cancer: Diagnosis, management, and outcomes in a case series of 23 patients

BACKGROUND: Skull base osteomyelitis (SBO) is an infection of the central cranial bones, most commonly resulting from contiguous spread of infection from adjacent head and neck structures. SBO is a well‐recognized complication of treatment of head and neck cancer (HNC) that results in significant morbidity. METHODS: We conducted a retrospective chart review of HNC patients diagnosed with SBO. RESULTS: SBO was commonly diagnosed with nasal endoscopy showing mucosal breakdown between the naso/oropharynx and skull base and with characteristic changes on CT/MRI. Culture data were often polymicrobial, inclusive of naso/oropharyngeal flora, but half of the patients additionally had antibiotic‐resistant or atypical pathogens. The mean duration of antimicrobial therapy was 117 +/− 94 days. Recurrent SBO was found in half of the patients, associated with Pseudomonas aeruginosa and with persistent defects in the mucosa abutting the skull base. CONCLUSIONS: Diagnosis and management of SBO in HNC patients are challenging. Recommendations to aid in clinical care are proposed. LEVEL OF EVIDENCE: 4, case series.