Black skin lesions may be melanocytic, including nevi and melanoma. Benign lesions can be classified by their cellular origin: melanocytic, keratinocytic, vascular, fibrous, fat, and so on, Which are the common melanocytic lesions? A macule (figure 3-3) is a definite area of skin in which the skin color has changed from the normal skin color. Skin lesions may be primary or secondary. Secondary lesions such as scales or ulcers may develop from primary lesions or result from external trauma (e.g., infections, scratching). Discover the symptoms and see pictures. Skin lesions can be seen during a general physical examination in a dermatology clinic. Primary 2. In this article, I discuss seborrheic keratosis, stucco keratosis, benign melanocytic nevus, cutaneous horn, actinic keratosis, blue nevus, lentigo, and porokeratosis. In contrast, secondary skin lesions result from changes over time caused by disease progression, manipulation (scratching, picking, rubbing), or treatment. Patch: a flat area of altered colour greater than 1.5cm in diameter. 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. Bulla : a circumscribed, elevated fluid-filled lesion greater than 1 cm in size (e.g. These 2 types of skin lesions can be differentiated as follows: Common benign skin lesions of melanocytic origin include the ephilis, lentigo simplex, and melanocytic naevus (mole). The majority of skin lesions are benign, but when a new lesion or mark appears on our skin, it can be difficult to tell whether it is dangerous. 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. Primary skin lesion s are basic and simple. Macule: a flat area of altered colour less than 1.5cm in diameter. Black eschars are collections of dead skin that can arise from infarction, which may be caused by infection (eg, anthrax , angioinvasive fungi including Rhizopus, meningococcemia ), calciphylaxis , arterial insufficiency, or vasculitis . epidermolysis bullosa, bullous impetigo). Types of lesion Basic skin lesions are broadly categorized as : 1. Nevertheless, it is useful to know how the common skin lesions look like to be able to recognise them. (1) Macule. c. Primary Skin Lesions. If you have any suspicions about a mark, mole or lesion, you should ask your doctor to check it. Primary skin lesions are those which develop as a direct result of a disease process. Primary lesions are those lesions that arise de novo and are therefore the most characteristic of the desease process. Primary lesions (e.g., macules or papules) appear as a direct result of a disease process. Leprosy (or Hansen’s disease) is a chronic, progressive bacterial infection that can cause disfigurement and disability if left untreated. This area is neither higher nor lower than the surrounding skin area. Primary skin lesions are present at the onset of a disease. There are two kinds of skin lesions. A primary lesion is a change in the skin that is caused by a certain disease or infection. The skin of elderly persons possesses a greater number of benign growths and neoplasms than the skin of younger and middle-aged persons. Secondary skin lesions result from complications of primary skin lesions. Papule: a solid raised palpable lesion less than 0.5cm in diameter. From this information, diagnostic possibilities are considered. Secondary 3. special 4. This findings are recorded as morphology of lesion, the distribution of lesions and the arrangement or grouping of lesions. Less than 1.5cm in diameter lesions ( e.g., macules or papules ) appear as a direct result a. 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