A rare case of subcutaneous fusariosis in an immunocompetent patient

Area of Science:

• Mycology
• Infectious Diseases
• Dermatology

Background:

• Fusarium species are known opportunistic pathogens, primarily affecting immunocompromised individuals.
• Infections in immunocompetent hosts are uncommon, with Fusarium oxysporum and Fusarium solani species complex being the most frequent culprits.
• Primary subcutaneous hyalohyphomycosis is an extremely rare manifestation of Fusarium infection.

Observation:

• A 45-year-old immunocompetent male presented with a seven-year history of a painful nodular lesion on his left ankle.
• The clinical presentation suggested a chronic subcutaneous fungal infection.

Findings:

• The case involved a subcutaneous infection caused by the Fusarium solani species complex.
• This represents one of the few reported instances of deep Fusarium infection in a healthy individual, with only 37 cases documented globally.

Implications:

• This case underscores the potential for Fusarium species to cause disease even in immunocompetent hosts.
• It highlights the diagnostic challenges and rarity of subcutaneous hyalohyphomycosis due to Fusarium.
• Increased clinical awareness is necessary for timely diagnosis and management of such unusual fungal infections.