Differential Diagnosis for Fungal Infection on Groin
- Single most likely diagnosis
- Tinea cruris (jock itch): This is the most common fungal infection affecting the groin area, caused by dermatophytes such as Trichophyton, Epidermophyton, and Microsporum. It presents with itching, redness, and a ring-shaped rash.
- Other Likely diagnoses
- Candidiasis: A fungal infection caused by Candida species, which can thrive in warm, moist areas like the groin. It presents with redness, itching, and a white discharge.
- Erythrasma: A bacterial infection caused by Corynebacterium minutissimum, which can be mistaken for a fungal infection. It presents with brownish-red patches and a foul odor.
- Intertrigo: A skin condition caused by friction and moisture, which can lead to secondary fungal or bacterial infections. It presents with redness, itching, and a foul odor.
- Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
- Histoplasmosis: A fungal infection caused by Histoplasma capsulatum, which can affect the lungs and disseminate to the skin, including the groin area. It presents with fever, weight loss, and skin lesions.
- Blastomycosis: A fungal infection caused by Blastomyces dermatitidis, which can affect the lungs and disseminate to the skin, including the groin area. It presents with fever, weight loss, and skin lesions.
- Rare diagnoses
- Chromoblastomycosis: A rare fungal infection caused by fungi such as Fonsecaea, Phialophora, and Cladophialophora. It presents with long-standing skin lesions and can affect the groin area.
- Sporotrichosis: A rare fungal infection caused by Sporothrix schenckii, which can affect the skin and subcutaneous tissue, including the groin area. It presents with nodular lesions and can disseminate to other parts of the body.