Differential Diagnosis for Chronic Unilateral Red Cheek with Darker Center in Toddler
- Single most likely diagnosis
- Slapped cheek syndrome (Erythema infectiosum): This is a common childhood illness caused by parvovirus B19, characterized by a distinctive "slapped cheek" appearance with a red rash and a pale center, although the description of a darker center may vary.
- Other Likely diagnoses
- Contact dermatitis: This is a type of skin inflammation caused by contact with irritants or allergens, which could result in a red, unilateral cheek rash.
- Atopic dermatitis (eczema): Although typically bilateral, atopic dermatitis can sometimes present unilaterally, especially if triggered by an external factor.
- Impetigo: A contagious skin infection that can cause red, crusty patches on the face, potentially with a darker center due to crusting.
- Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
- Cellulitis: A bacterial skin infection that can cause redness, swelling, and warmth, potentially with a darker center due to necrosis or abscess formation.
- Meningococcemia: A severe infection caused by Neisseria meningitidis, which can present with a petechial or purpuric rash, although this is typically more widespread.
- Rare diagnoses
- Lupus miliaris disseminatus faciei: A rare form of cutaneous lupus that can cause reddish-brown papules on the face, potentially with a darker center.
- Sarcoidosis: A systemic disease that can cause skin lesions, including those on the face, although this is rare in toddlers.