Cutaneous mucormycosis in a heart transplant patient associated with a peripheral catheter

Area of Science:

• Mycology
• Infectious Diseases
• Transplant Surgery

Background:

• Heart transplant recipients are immunocompromised and susceptible to opportunistic infections.
• Corticosteroid therapy, common post-transplant, can induce hyperglycemia, a risk factor for fungal infections.
• Intravascular catheters are potential portals for microbial entry in vulnerable patients.

Observation:

• A heart transplant patient developed a necrotic lesion at the insertion site of a peripheral venous catheter.
• The patient had a history of corticosteroid-induced hyperglycemia and an acute tissue rejection episode.
• The lesion rapidly spread over 24 hours.

Findings:

• Biopsy confirmed the presence of typical mucorales hyphae, indicative of mucormycosis.
• The causative organism was identified as a Mucor species.
• This represents the first reported case of intravascular catheter-related primary cutaneous mucormycosis in a heart transplant recipient.

Implications:

• Highlights the risk of rare but aggressive fungal infections in heart transplant patients.
• Underscores the importance of vigilant monitoring of catheter insertion sites in immunocompromised individuals.
• Suggests a potential link between hyperglycemia, immunosuppression, and catheter-related mucormycosis, necessitating prompt diagnosis and aggressive management, including amputation in severe cases.