Lesiones básicas

The different types of skin lesions play an essential role in the precise description of skin diseases. One distinguishes between primary and secondary lesions.

Lesiones primarias

Primary lesions are skin lesions at the beginning of the dermatosis, without secondary changes. They have a greater diagnostic impact than secondary lesions.


International nomenclature for the description of cutaneous lesions. The international nomenclature includes 8 basic terms and over hundred descriptive additional terms. The unifying nomenclature serves as a crucial communication skill between dermato-venerologists and all medical disciplines which are confronted with skin problems or take care of the skin.

Skin and skin diseases present with signs and lesions that have distinct characteristics. The original lesions are defined as primary lesions, and the identification of such lesions is the most important aspect of the dermatologic physical examination. They tend to have a greater diagnostic impact compared to secondary lesions. They may be stable or be modified by progession or regression, trauma or other local or systemic factors, producing the secondary lesions. The four most important features in concisely describing dermatological findings are description of the lesions, and then their localisation, distribution and evolution.

Primary Lesion thumbnail 1.1 Mácula

Primary Lesion thumbnail 1.2 Habón

Primary Lesion thumbnail 1.3 Pápula (nódulo y también placas)

Primary Lesion thumbnail 1.4 Nódulo (también quiste)

Primary Lesion thumbnail 1.5 Vesícula

Primary Lesion thumbnail 1.6 Pústula

Lesiones secundarias

Secondary lesions develop from primary lesions over time or by additional artifacts, like scratching. They have less diagnostic impact and often do not allow conclusions to the primary lesions, since various primary lesions may evolve to the same secondary lesion, like for example scaling.


Secondary Lesion thumbnail 2.1 Escama

Secondary Lesion thumbnail 2.2 Costra

Secondary Lesion thumbnail 2.3 Erosión / Excoriación

Secondary Lesion thumbnail 2.4 Úlcera

Secondary Lesion thumbnail 2.5 Atrofia

Secondary Lesion thumbnail 2.6 Cicatriz