Ostéomyélite de la base du crâne d'origine otosinusienne. Étude d'une série de cinq cas récents

Complicated actinomycosis of the temporal bone: A historical case report

INTRODUCTION

Actinomycosis is a chronic infection caused by anaerobic Gram-positive bacteria belonging to the Actinomyces family. The zones of predilection of this infection are mainly the head, neck and abdominal regions.

CASE REPORT

We report the case of a 30-year-old man admitted for aggressive right oto-mastoiditis complicated by facial nerve palsy and sensorineural hearing loss. CT scan demonstrated extensive destruction of the temporal bone. The patient underwent radical mastoidectomy followed by long-term antibiotic therapy.

DISCUSSION

Its non-specific symptoms and atypical course, combined with difficult isolation of the causative agent, make actinomycosis a difficult infection to diagnose. Actinomycosis very rarely involves the temporal region, as fewer than 30 cases have been reported in the literature. Treatment of this form of actinomycosis is based on surgery and prolonged antibiotic therapy. Surgical treatment is designed to reduce the bacterial load by mechanical debridement and create aerobic conditions.

CONCLUSION

Compared to other cases reported in the literature, the case of temporal actinomycosis reported here was distinguished by its highly aggressive nature. Temporal actinomycosis should be suspected in the context of chronic otitis media with an atypical course. Treatment is based on a combination of surgery and antibiotics.

Skull base osteomyelitis originating in the middle ear or mastoid: a review of 3 cases

Skull base osteomyelitis is a life-threatening condition that sometimes arises as a sequela of otitis media and mastoiditis. We present a retrospective analysis of the clinical course of 3 patients with skull base osteomyelitis that originated in the middle ear or mastoid. All 3 patients were elderly diabetic men who presented with headache. We review the clinical features, radiologic findings, and culture results in all 3 cases, and we describe the treatment regimens that led to a successful response in all 3 patients.

Necrotizing otitis externa: 19 cases' report

Necrotizing otitis externa is an uncommon but severe infectious disease of the external auditory canal. Patients at risk are those immunodepressed or having diabetes. The causal germ is often Pseudomonas aeruginosa. Over a period of 10 years (1997-2006), we treated 19 patients: 94.7% had diabetes (insulin dependent in 6 cases). The causal germ was P. aeruginosa in 59% of cases. The pretherapeutic work-up included a computed tomography and a scintigraphy practiced in order to confirm diagnosis and assess the extension. Medical treatment was based on a parenteral antibiotic therapy using a third-generation cephalosporin and a fluoroquinolones. Local treatment of the auditory canal including cleaning and application of antimicrobial agents was performed in all the cases. Surgical debridement of soft tissue and infected bone was performed in one patient who did not respond to medical management. Repeated scintigraphies with gallium were used to follow the course under treatment in only three cases. We had a 89.4% cure rate with only three cases of recurrence. We reviewed the data in the literature on necrotizing otitis externa and present the important diagnostic, imaging, and therapeutic aspects of the disease.