Differential Diagnosis for Dark Patch-Like Lesions on Fingers
Primary Differential Diagnoses
- Actinic keratoses occur on chronically sun-exposed dorsal hands, presenting as rough, scaly patches that may be pigmented, and can itch occasionally, according to the British Journal of Dermatology 1, 2
- Post-inflammatory hyperpigmentation can be secondary to previous eczema, psoriasis, trauma, or infection, with a history of preceding inflammatory lesion being key, as noted by Praxis Medical Insights: Practical Summaries of Clinical Guidelines 3