HSC Section 8_April 2017

Otolaryngology–Head and Neck Surgery 148(6)

assessment of disease involvement by CT and MRI remains valuable. Although the extent of anatomical involvement does not reliably predict outcome, those with clival involve- ment indicating central skull base osteomyelitis were noted to do much poorer with conventional treatment, and this should be explored in future studies. The choice of antibio- tic therapy is difficult in culture-negative cases in view of increasing reports of antibiotic resistance in P aeruginosa , but our outcomes with empirical combination therapy using intravenous ceftazidime and oral fluoroquinolone suggests that this regime remains effective.

10. Jacobsen LM, Antonelli PJ. Errors in the diagnosis and man- agement of necrotizing otitis externa. Otolaryngol Head Neck Surg . 2010;143:506-509. 11. Amorosa L, Modugno GC, Pirodda A. Malignant external otitis: review and personal experience. Acta Otolaryngol Suppl . 1996; 521:3-16. 12. Mani N, Sudhoff H, Rajagopal S, Moffat D, Axon PR. Cranial nerve involvement in malignant external otitis: implications for clinical outcome. Laryngoscope . 2007;117:907-910. 13. Peleg U, Perez R, Raveh D, Berelowitz D, Cohen D. Stratification for malignant external otitis. Otolaryngol Head Neck Surg . 2007;137:301-305. 14. Sudhoff H, Rajagopal S, Mani N, Moumoulidis I, Aron PR, Moffat D. Usefulness of CT scans in malignant external otitis: effective tool for the diagnosis, but of limited value in predict- ing outcome. Eur Arch Otorhinolaryngol . 2008;265:53-56. 15. Sreepada GS, Kwartler JA. Skull base osteomyelitis secondary to malignant otitis externa. Curr Opin Otolaryngol Head Neck Surg . 2003;11:316-323. 16. Livermore DM. Multiple mechanisms of antimicrobial resis- tance in Pseudomonas aeruginosa : our worst nightmare? Clin Infect Dis . 2002;34(5):634-640. 17. GIamarellou H, Kanellakopoulou L. Current therapies for Pseudomonas aeruginosa . Crit Care Clin . 2008;24(2):261-278. 18. Berenholz L, Katzenell U, Harell M. Evolving resistant Pseudomonas to ciprofloxacin in malignant otitis externa. Laryngoscope . 2002;112:1619-1622. 19. Jones ME, Karlowsky JA, Draghi DC, Thornsberry C, Sahm DF, Nathwani D. Antibiotic susceptibility of bacteria most commonly isolated from bone related infections: the role of cephalosporins in antimicrobial therapy. Int J Antimicrob Agents . 2004;23:240-246. 20. Jang CH, Park SY. Emergence of ciprofloxacin-resistant Pseudomonas in chronic suppurative otitis media. Clin Otolaryngol . 2004;29:321-323. 21. Levenson MJ, Parisier SC, Dolitsky J, Bindra G. Ciprofloxacin: drug of choice in the treatment of malignant external otitis (MEO). Laryngoscope . 1991;101:821-824. 22. Kimmelman CP, Lucente FE. Use of ceftazidime for malignant external otitis. Ann Otol Rhinol Laryngol . 1989;98:721-725. 23. Rubin J, Stoehr G, Yu VL, Muder RR, Matador A, Kamerer DB. Efficacy of oral ciprofloxacin plus rifampin for treatment of malignant external otitis. Arch Otolaryngol Head Neck Surg . 1989;115(9):1063-1069. 24. Korvick JA, Peacock JE, Muder RR, Wheeler RR, Yu VL. Addition of rifampin to combination antibiotic therapy for Pseudomonas aeruginosa bacteremia: prospective trial using the Zelen protocol. Antimicrob Agents Chemother . 1992;36(3): 620-625.

Author Contributions

Shaun Loh , data collection, entry, analysis and writing of manu- script; Woei Shyang Loh , study idea, advice on analysis, review of manuscript.

Disclosures Competing interests: None. Sponsorships: None. Funding source: None.

References

1. Chandler JR. Malignant external otitis. Laryngoscope . 1968; 78:1257-1294. 2. Carfrae MJ, Kesser BW. Malignant otitis externa. Otolaryngol Clin North Am . 2008;41:537-549. 3. Rubin Grandis J, Branstetter BF, Yu VL. The changing face of malignant external otitis: clinical, radiological, and anatomic correlations. Lancet Infect Dis . 2004;4:34-39. 4. Soudry E, Hamzany Y, Preis M, Joshua B, Hadar T, Nageris BI. Malignant external otitis: analysis of severe cases. Otolaryngol Head Neck Surg . 2011;144:758-762. 5. Franco-Vidal V, Blanchet H, Bebear C, Dutrone H, Darrouzet V. Necrotizing external otitis: a report of 46 cases. Otol Neurotol . 2007;28:771-773. 6. Rubin J, Yu VL. Malignant external otitis: insights into patho- genesis, clinical manisfestations, diagnosis and therapy. Am J Med . 1988;85:391-398. 7. Hariga I, Mardassi A, Younes FB, et al. Necrotizing otitis externa: 19 cases’ report. Eur Arch Otorhinolaryngol . 2010; 267:1193-1198. 8. Geerlings SE, Hoepelman AI. Immune dysfunction in patients with diabetes mellitus (DM). FEMS Immunol Med Microbiol . 1999;26:259-265. 9. Chen CN, Chen YS, Yeh TH, Hsu CJ, Tseng FY. Outcomes of malignant external otitis: survival vs mortality. Acta Otolaryngol . 2010;130:89-94.

93

Made with