Cytology of a hyperpigmented cystic tumor on the thigh.
The article in Diagnostic Cytopathology describes a unique case of a phaeohyphomycotic cyst caused by Medicopsis romeroi.
A 27-year-old female patient on long-term corticosteroid therapy presented with a hyperpigmented cystic tumor in the thigh region. Fine-needle aspiration biopsy revealed septate fungal hyphae, confirmed by PAS and GMS staining.
Phaeohyphomycosis is a group of infections caused by dematiaceous or pigmented filamentous fungi, which contain melanin in their cell walls and manifest with several clinical presentations, from solitary cutaneous nodules to deep subcutaneous abscesses.
