sQUIZ your knowledge: Chronic paronychia of the third toe

A 60-year-old female patient was seen for a four-year evolving painless paronychia with purulent discharge on the lateral aspect of the third toe, on the left (figure 1). The culture of pus and mycological examination were negative. Previous treatments with topical and systemic antifungals were ineffective.What is your diagnosis?Subungual squamous cell carcinoma (SSCC)Based on the clinical findings, negative culture of pus, negative mycological examination and histopathology, the diagnosis of SSCC [...]