Background: Sporotrichosis is the most common and least severe of deep mycoses. This disease has varied clinic presentation as well as several differential diagnosis.
Methods: A cross-sectional and retrospective, individually based, observational study, based on records from the dermatopathology service of a university hospital in Brazil. A total of 175 patients were identified with clinical suspicion of sporotrichosis, from 2009 to 2017. Statistical analysis using prevalence ratios was conducted to characterize the clinicopathologic and epidemiological aspects.
Results: The disease was suspected in 175 patients given the clinical presentation. Of these, 86 cases (49.14%) were sporotrichosis, 39 (22.29%) chronic granulomatous inflammatory processes of unidentified etiology, and 5 squamous cell carcinomas (2.86%). The majority of cases (52 or 60.46%) occurred in the upper limbs. A total of 40 samples presented a suppurative chronic granulomatous inflammatory process (46.51%). Only 5 samples (12.50%) showed positive staining (periodic-Schiff acid or GROCOTT).
Conclusions: The sporotrichosis cases underwent both cumulative and linear growth, especially in the group above 60 years. Squamous cell carcinomas appeared several times as a misdiagnosis of sporotrichosis by dermatologists, so it should be considered as an important differential diagnose due to the current context of skin cancers.
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