Differential Diagnosis for Dry Scaly Patches on Dorsal Hands
- Single Most Likely Diagnosis
- Eczema (Atopic Dermatitis): This is a common condition characterized by dry, scaly, and itchy skin patches. The dorsal hands are a typical location, and the presentation matches the symptoms described.
- Other Likely Diagnoses
- Psoriasis: A chronic skin condition that can cause dry, scaly patches on various parts of the body, including the hands. The dorsal surface is less common than other areas like the elbows or knees, but it's still a possible location.
- Contact Dermatitis: This is a type of skin inflammation caused by contact with irritants or allergens. The hands, especially the dorsal surface, can be exposed to various substances that might trigger this condition.
- Xerosis (Dry Skin): Simple dry skin can become scaly, especially in dry environments or with excessive hand washing. This is a common and benign condition but can be uncomfortable.
- Do Not Miss Diagnoses
- Squamous Cell Carcinoma: Although less likely, any persistent or changing skin lesion should be evaluated for the possibility of skin cancer. Squamous cell carcinoma can present as a scaly patch and is more common in sun-exposed areas like the dorsal hands.
- Lichen Planus: An inflammatory condition that can affect the skin, mouth, and other areas. It might present with scaly, flat patches, and while less common on the hands, it's a diagnosis that shouldn't be missed due to its potential for mucosal involvement and association with other autoimmune diseases.
- Rare Diagnoses
- Pityriasis Rubra Pilaris: A rare skin disorder characterized by constant scaling, which can involve the hands among other areas. It's much less common than the other conditions listed but should be considered in cases that don't respond to typical treatments.
- Keratoderma: A group of rare skin conditions characterized by thickening of the skin on the palms and soles, but some forms can also affect the dorsal hands, leading to dry, scaly patches.