First line treatment of Candida osteomyelitis of the sternum: Is there really a need for radical surgical debridement and reconstructive surgery in Candida osteomyelitis of the sternum after cardiac surgery?

Osteoarticular Mycoses

Osteoarticular mycoses are chronic debilitating infections that require extended courses of antifungal therapy and may warrant expert surgical intervention. As there has been no comprehensive review of these diseases, the International Consortium for Osteoarticular Mycoses prepared a definitive treatise for this important class of infections. Among the etiologies of osteoarticular mycoses are Candida spp., Aspergillus spp., Mucorales, dematiaceous fungi, non-Aspergillus hyaline molds, and endemic mycoses, including those caused by Histoplasma capsulatum, Blastomyces dermatitidis, and Coccidioides species. This review analyzes the history, epidemiology, pathogenesis, clinical manifestations, diagnostic approaches, inflammatory biomarkers, diagnostic imaging modalities, treatments, and outcomes of osteomyelitis and septic arthritis caused by these organisms. Candida osteomyelitis and Candida arthritis are associated with greater events of hematogenous dissemination than those of most other osteoarticular mycoses. Traumatic inoculation is more commonly associated with osteoarticular mycoses caused by Aspergillus and non-Aspergillus molds. Synovial fluid cultures are highly sensitive in the detection of Candida and Aspergillus arthritis. Relapsed infection, particularly in Candida arthritis, may develop in relation to an inadequate duration of therapy. Overall mortality reflects survival from disseminated infection and underlying host factors.

Treatment of Candida sternal infection following cardiac surgery - a review of literature

BACKGROUND

Candida sternal wound infections (SWIs) following cardiac surgery are rare but are associated with a high mortality rate. Guidelines on this topic either propose no suggestions for management or offer recommendations based on a small number of reports.

METHODS

This paper presents a case of a Candida SWI and its successful treatment with debridement using a burr, negative pressure vacuum therapy (NPVT) and dermal grafting. To investigate different methods of treating Candida SWIs following cardiac surgery, a review was completed using the MEDLINE database. Reports without English abstracts and without defined outcomes of therapy for individual patients were excluded.

RESULTS

Seventy-seven cases of Candida SWIs following cardiac surgery were identified in 20 articles published since 1999, including our case. Treatment strategies are identified: omentum flap; muscle flap; debridement and secondary wound healing with or without NPVT; debridement and primary closure; incision and drainage; only medical therapy. Patients documented in the articles were classified based on the following outcomes: cured (n = 41 patients [including the present case]), relapse infection (n = 25 patients) and death (n = 11 patients). The various methods used to treat patients were analysed.

CONCLUSIONS

Delayed closure reoperation with surgical debridement and NPVT have favourable outcomes. In the presence of widespread osteomyelitis, the use of omental flaps is advocated. Treatment with muscle flaps has a high rate of relapse. Debridement and secondary healing or conservative management with antifungals alone can be considered in the treatment of relapsing infection.