Differential Diagnosis for Color Change on Penile Shaft with Itching
- Single most likely diagnosis
- Tinea cruris (Jock itch): A fungal infection that can cause color change, itching, and a tentacle-like or ring-shaped rash on the penile shaft. It's a common condition, especially in warm and humid environments.
- Other Likely diagnoses
- Contact dermatitis: An allergic or irritant reaction to soaps, lotions, or other substances that can cause itching, redness, and color change on the penile shaft.
- Eczema (atopic dermatitis): A chronic skin condition that can cause itching, redness, and color change, and may appear on the penile shaft.
- Psoriasis: An autoimmune condition that can cause red, scaly patches on the skin, including the penile shaft, and may be accompanied by itching.
- Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
- Squamous cell carcinoma: A type of skin cancer that can cause color change and itching on the penile shaft, although it's relatively rare.
- Lymphogranuloma venereum (LGV): A sexually transmitted infection that can cause itching, redness, and color change on the penile shaft, and can lead to serious complications if left untreated.
- Syphilis: A sexually transmitted infection that can cause a variety of skin symptoms, including color change and itching on the penile shaft, and can lead to serious complications if left untreated.
- Rare diagnoses
- Pemphigus: A rare autoimmune condition that can cause blistering and color change on the skin, including the penile shaft.
- Fixed drug eruption: A rare condition that can cause color change and itching on the skin, including the penile shaft, in response to certain medications.
- Mycobacterial infections: Rare infections that can cause color change and itching on the skin, including the penile shaft, such as Leprosy or Mycobacterium avium complex.