Primary lesions are those lesions that arise de novo and are therefore the most characteristic of the desease process. Secondary lesions such as scales or ulcers may develop from primary lesions or result from external trauma (e.g., infections, scratching). When describing a skin lesion,it is important to note the following features:- 1)size 2)type 3)shape and symmetry 4)colour and pigmentation 5)surface area 6)Distribution over the body surface 3. If you have any suspicions about a mark, mole or lesion, you should ask your doctor to check it. There are several different types, including the macule, papule, vesicle, plaque, bulla, patch, tumor, wheal, nodule, and pustule.These are not specific to one disease, and are not always considered to be a primary lesion. In contrast, secondary skin lesions result from changes over time caused by disease progression, manipulation (scratching, picking, rubbing), or treatment. From this information, diagnostic possibilities are considered. Bulla : a circumscribed, elevated fluid-filled lesion greater than 1 cm in size (e.g. A macule (figure 3-3) is a definite area of skin in which the skin color has changed from the normal skin color. Patch: a flat area of altered colour greater than 1.5cm in diameter. The skin of elderly persons possesses a greater number of benign growths and neoplasms than the skin of younger and middle-aged persons. Primary skin lesions are present at the onset of a disease. A primary lesion is a change in the skin that is caused by a certain disease or infection. Macule: a flat area of altered colour less than 1.5cm in diameter. Papule: a solid raised palpable lesion less than 0.5cm in diameter. Skin lesions can be seen during a general physical examination in a dermatology clinic. Benign lesions can be classified by their cellular origin: melanocytic, keratinocytic, vascular, fibrous, fat, and so on, Which are the common melanocytic lesions? Skin lesions may be primary or secondary. These 2 types of skin lesions can be differentiated as follows: In this article, I discuss seborrheic keratosis, stucco keratosis, benign melanocytic nevus, cutaneous horn, actinic keratosis, blue nevus, lentigo, and porokeratosis. Primary 2. epidermolysis bullosa, bullous impetigo). Primary lesions (e.g., macules or papules) appear as a direct result of a disease process. Black skin lesions may be melanocytic, including nevi and melanoma. Discover the symptoms and see pictures. Primary skin lesion s are basic and simple. c. Primary Skin Lesions. (1) Macule. Types of lesion Basic skin lesions are broadly categorized as : 1. There are two kinds of skin lesions. Common benign skin lesions of melanocytic origin include the ephilis, lentigo simplex, and melanocytic naevus (mole). This findings are recorded as morphology of lesion, the distribution of lesions and the arrangement or grouping of lesions. Secondary skin lesions result from complications of primary skin lesions. 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