Читать книгу Essentials of Diseases of the Skin - Henry Weightman Stelwagon - Страница 12

Table of Contents

What are secondary lesions?

Those lesions resulting from accidental or natural change, modification or termination of the primary lesions.

Enumerate the secondary lesions.

Scales, crusts, excoriations, fissures, ulcers, scars and stains.

What are scales (squamæ)?

Dry, laminated, epidermal exfoliations; as, for example, the scales of psoriasis, ichthyosis, and eczema.

What are crusts (crustæ)?

Dried effete masses of exudation; as, for example, the crusts of impetigo, of eczema, and of the pustular and ulcerating syphilodermata.

What are excoriations (excoriationes)?

Superficial, usually epidermal, linear or punctate loss of tissue; as, for example, ordinary scratch-marks.

What are fissures (rhagades)?

Linear cracks or wounds, involving the epidermis, or epidermis and corium; as, for example, the cracks which often occur in eczema when seated about the joints, the cracks of chapped lips and hands.

What are ulcers (ulcera)?

Rounded or irregularly-shaped and sized loss of skin and subcutaneous tissue resulting from disease; as, for example, the ulcers of syphilis and of cancer.

What are scars (cicatrices)?

Connective-tissue new formations replacing loss of substance.

What are stains?

Discolorations left by cutaneous disease, which stains may be transitory or permanent.