Differential Diagnosis for Red Bumpy Genital Rash after Trip to Africa in 60-year-old Male
Single Most Likely Diagnosis
- Tinea cruris (Jock itch): A common fungal infection that can cause a red, bumpy rash in the genital area, especially after traveling to warm and humid climates like Africa. The infection thrives in moist environments, making it a likely diagnosis given the patient's recent travel history.
Other Likely Diagnoses
- Contact dermatitis: An allergic reaction or irritation from insect bites, plants, or other substances encountered during travel could cause a red, bumpy rash.
- Scabies: A parasitic infection caused by the scabies mite, which can be acquired through skin-to-skin contact with an infected person, potentially during travel.
- Genital herpes: A viral infection that can cause painful blisters or rashes in the genital area, which could be contracted during travel.
Do Not Miss Diagnoses
- Hansen's disease (Leprosy): Although rare, leprosy can cause skin lesions and rashes, and given the patient's travel to Africa, where leprosy is more common, it is crucial not to miss this diagnosis due to its potential for serious complications if left untreated.
- Syphilis: A bacterial infection that can cause a variety of skin rashes and lesions, including in the genital area. It's essential to consider syphilis due to its serious long-term consequences if not treated promptly.
Rare Diagnoses
- Schistosomiasis (Bilharzia): A parasitic infection that can be acquired through contact with contaminated water in Africa. While it primarily affects the urinary or intestinal system, it can cause skin lesions or rashes in some cases.
- Onchocerciasis (River blindness): Another parasitic infection that can cause skin lesions, although it is more commonly associated with eye and skin symptoms that are not typically confined to the genital area.