Differential Diagnosis for Scattered Annular Macula with Central Clearing
- Single most likely diagnosis
- Erythema migrans (Lyme disease): This is the most common diagnosis for a scattered annular macula with central clearing, particularly if the patient has a history of tick exposure. The rash is often accompanied by other symptoms such as fever, headache, and fatigue.
- Other Likely diagnoses
- Tinea corporis (ringworm): A fungal infection that can cause annular lesions with central clearing, often itchy and can be found on various parts of the body.
- Granuloma annulare: A benign skin condition characterized by a ring of small, bumps or lesions, often with central clearing, typically found on the hands and feet.
- Nummular dermatitis: A type of eczema that can cause coin-shaped patches of dry, itchy skin, sometimes with central clearing.
- Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
- Erythema multiforme: A skin condition that can cause target-shaped lesions, sometimes with central clearing, and can be a sign of a life-threatening condition if not promptly treated.
- Rocky Mountain spotted fever: A bacterial infection that can cause a rash with central clearing, often accompanied by fever, headache, and other severe symptoms.
- Rare diagnoses
- Secondary syphilis: A stage of syphilis that can cause a variety of skin rashes, including annular lesions with central clearing.
- Leprosy: A chronic bacterial infection that can cause skin lesions, including annular ones with central clearing, often accompanied by nerve damage and other symptoms.
- Sarcoidosis: A condition that can cause granulomatous lesions, including annular ones with central clearing, often affecting the lungs, skin, and other organs.