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Tinea Cruris
Aka: Tinea Cruris, Jock Itch
- See Also
- Intertrigo
- Erythrasma
- Pathophysiology
- Often associated with Tinea Pedis
- Groin inoculated with patient's hands
- Etiology (same as Tinea Pedis)
- Trichophyton rubrum
- Trichophyton mentagrophytes
- Epidermophyton floccosum
- Epidemiology
- More common in teen and young adult males
- Also common in teen females who are Overweight or wear occlusive clothing
- Signs
- Distribution
- Bilateral thighs
- Inguinal folds
- Buttocks
- Spared areas: Scrotum and penis
- Suspect Cutaneous Candidiasis if involved
- Characteristics
- Asymmetric erythematous annular Plaques
- Scaling
- Central clearing
- Occasional Papules or Vesicles
- Differential Diagnosis
- Candidiasis (Intertrigo)
- Seborrheic Dermatitis
- Erythrasma (fluoresces coral red under wood's lamp)
- Psoriasis (Inverse)
- Lichen Simplex Chronicus
- Pemphigus
- Contact Dermatitis
- Extramammary Paget's Disease
- Management
- Treat concurrent Tinea Pedis if present
- Topical Antifungal cream bid for 2-4 weeks
- Technique
- Apply to normal skin 2 cm beyond affected area
- Continue for 7 days after symptom resolution
- First line: Imidazoles (e.g. Clotrimazole)
- Refractory cases: Naftin, Lamisil, Loprox, Mentax
- Loose fitting clothes, boxer shorts
- Powders to reduce moisture
- Antibacterial soap
- References
- Andrews (2008) Am Fam Physician 77(10): 1415-20 [PubMed]
- Schwartz (2004) Lancet 364(9440):1173-82 [PubMed]