What type of lesions are considered seborrheic keratosis?

Seborrheic keratosis is classified as a benign epithelial tumor. These growths are non-cancerous and typically appear as raised, scaly, or wart-like lesions on the skin. They are often characterized by their waxy, smooth, or rough texture and can vary in color from light tan to black. The benign nature of seborrheic keratosis means that they do not invade surrounding tissues or metastasize, distinguishing them from malignant growths.

In contrast, the other types mentioned, such as viral infections or malignant growths, involve different processes and implications for treatment and prognosis. Viral infections would generally relate to conditions caused by viruses, while malignant growths are cancerous. Non-contagious warts, while also benign, arise from viral infections and therefore do not fit the definition of seborrheic keratosis. Thus, identifying seborrheic keratosis as benign epithelial tumors accurately reflects their classification and behavior in dermatological contexts.