Differential Diagnosis for Bilateral Anterior Leg Sores in a Teenager
Single Most Likely Diagnosis
- Eczema (Atopic Dermatitis): This is a common condition in teenagers that can cause itchy, inflamed skin, potentially leading to sores, especially if scratched. The anterior legs are a common site for eczema.
Other Likely Diagnoses
- Contact Dermatitis: This could be due to an allergic reaction or irritation from substances like soap, detergent, or certain fabrics that come into contact with the skin, leading to sores.
- Insect Bites: Repeated bites from insects like mosquitoes or bed bugs can cause itchy sores, especially if the individual scratches them.
- Impetigo: A contagious bacterial skin infection that can cause red sores on the skin, often found on exposed areas like the legs.
Do Not Miss Diagnoses
- Diabetic Ulcers: Although less common in teenagers, undiagnosed diabetes can lead to skin ulcers, especially on the legs. Early detection is crucial.
- Vasculitis: Inflammation of the blood vessels can cause skin lesions and sores. Some forms of vasculitis can be serious and require prompt treatment.
- Infections like Cellulitis or Erysipelas: Bacterial infections of the skin and underlying tissues that can cause redness, swelling, and sores, requiring antibiotic treatment.
Rare Diagnoses
- Pyoderma Gangrenosum: A rare condition that causes tissue to become necrotic, leading to deep ulcers, often on the legs.
- Cutaneous Leishmaniasis: A parasitic infection spread by sandflies, which can cause skin sores, though it's more common in specific geographic areas.
- Cutaneous Lupus: An autoimmune disease that can cause skin lesions and sores, among other symptoms, though it's less common in teenagers without a family history.