Squamous cell carcinoma
Basal cell carcinoma
Common Solitary Skin Lesions
A skin lesion that is single, small, and localized is referred to as a solitary skin lesion. Solitary skin lesions range from common benign (harmless) lesions, such as a wart, to serious, life-threatening lesions, such as melanoma – the most dangerous of the skin cancers. Solitary lesions often have distinctive visual features suggesting a precise diagnosis. The seborrheic keratosis often appears to be “stuck on” to the skin’s surface. Sometimes, however, seborrheic keratoses are flat. Warts have a particular and distinct appearance, with many small projections. In the elderly, though, squamous cell carcinoma can look like a wart, so one must be careful when considering a wart-like lesion. Sometimes it is impossible to know the precise diagnosis without a biopsy. When diagnosing a patient who complains of a pigmented lesion and there is a history of change, then it is almost always prudent to biopsy.
Click a topic below for pictures and information. Students should review VisualDx for multiple images and a summary of each disease or condition.