Diagnosis: Tinea corporis
A 32-year-old male presented with a pruritic, annular, scaly plaque on his trunk that had been persistent for three weeks. Examination revealed a well-demarcated lesion with central clearing and raised borders. This case illustrates a common superficial fungal infection often associated with dermatophytes.
A 32-year-old male presented with a three-week history of a pruritic lesion on his trunk. On examination, a solitary, well-defined, annular plaque with central clearing and raised erythematous borders was noted. The patient reported some scaling at the periphery of the lesion.Location: TrunkLesion characteristics: Annular, scaly plaque with central clearingBorder: Well-demarcated, raisedAssociated symptoms: PruritusDuration: 3 weeks
The lesion began insidiously and was initially mistaken for a dermatitis. The patient reported no recent travel or exposure to animals, but he frequently engaged in sports, often sharing equipment. He had no significant past medical history and no family history of skin disorders. Previous treatments included over-the-counter antifungal creams without improvement.Onset: Insidious, 3 weeks agoTriggers: Sharing sports equipmentPrior treatments: Over-the-counter antifungal creamsPast medical history: UnremarkableFamily history: No skin disordersSocial history: Engages in sports regularly
Acute / First-Line ManagementTopical antifungals such as clotrimazole 1% cream applied twice daily for 2-4 weeks.Alternatives include terbinafine 1% cream or miconazole 2% cream, also applied twice daily.Workup and Diagnostic ConfirmationSkin scraping for KOH preparation to identify hyphae and spores.Fungal culture may be performed if diagnosis is uncertain or lesions do not improve with topical treatment.Long-Term ManagementEducate on the importance of avoiding sharing personal items, such as towels and sports equipment.Consider systemic antifungal therapy (e.g., griseofulvin 20 mg/kg/day) if extensive or refractory cases are present.Monitor for recurrence and consider prophylactic measures for high-risk individuals.
Granuloma annulare: Characterized by annular plaques, often asymptomatic, typically lacking the scaling seen in fungal infections.Psoriasis: May present with annular lesions but usually has silvery scales and associated nail changes.Nummular eczema: Presents as coin-shaped patches, often with intense itch and a history of atopy.Contact dermatitis: Often has a history of exposure to irritants or allergens, with vesicular or weeping lesions.Inverse psoriasis: May mimic tinea but typically lacks scaling and is found in intertriginous areas.Secondary syphilis: Can present with annular lesions but is usually associated with systemic symptoms and mucous membrane involvement.Cutaneous leishmaniasis: Presents with ulcerative lesions and a travel history to endemic areas.Discoid lupus erythematosus: Characterized by scarring and atrophy, typically with a history of photosensitivity.
High-Yield PearlsDiagnosis: Clinical diagnosis is often sufficient, but KOH preparation can confirm the presence of dermatophytes.Topical therapy: First-line treatment typically involves topical antifungals for localized infections.Prevention: Emphasize hygiene and avoidance of sharing personal items to reduce transmission risk.Systemic therapy: Consider systemic antifungals for extensive or recalcitrant cases.Education: Patient education on the condition and its management is crucial for successful outcomes.Remember, the key to managing superficial fungal infections is early diagnosis and appropriate topical treatment.
Tags: tinea corporis, dermatophyte