Physical Examination in Dermatology: Primary Lesions

Abstract

The analysis of certain characteristics such as shape, size, surface, and color of a lesion has enabled the identification of “primary or elementary lesions” which represent the skin’s response to various diseases and aggressions. All skin lesions are the result of the combination of one or several primary lesions, i.e., the most elementary lesions that can represent various skin diseases and may be used to describe them. In order to be classified as primary, a lesion must be easily identified from another without confusion. Primary lesions allow the description of all alterations of the skin. The combination of several of these lesions can produce actual syndromes. The primary lesions consist in an “alphabet” that the physician must learn to recognize in order to be able to describe and to diagnose a skin disease by inspecting, palpating, and folding the skin. Good lighting is essential.