Moles - nevus melanocitic Diagnosis

Moles - nevus melanocitic
Diagnosis
By definition melanotici congenital nevi are present at birth or soon after, and earned nevi are present at birth, increased incidence in the third decade of life. Maxum melanocitici incidence of nevi is the fourth or fifth decade of life and incidence increases with each decade, with a low incidence in the elderly.
Melanocitici nevi are common lesions that can be found on the skin of any person. Some patients have few injuries while others hundreds. The number increases to an individual in proportion to the degree of skin pigmentation. Nevi can be divided into congenital and earned. Determining whether a nevus is congenital or gain is generally mild through when you have it, although some congenital nevi may be perceived by the patient as earned.
When evaluating the nature of injuries melanocitice down certain features. It is important if a lesion became symptomatic (itching, painful, irritated or bleeding). Not all melanocitici nevi that change are malignant, especially if the change is noted in a person under 40 years. However the changes that are perceived intro short time are an indicator of malignant potential and requires observation and biopsy of the lesion.
Melanocitici nevi are typically earn less than 1 cm in diameter and evenly colored. The most common nevi are brown, but coloration can be variable from the begru nepigmentati.
Spitz nevi are moles melanocitici a distinct variant. In decades past these lesions were called juvenile melanomas, but today are recognized by specific microscopic tests and are benign. Although Spitz nevi tend to manifest as pink papules on the head in children may be clinically undifferentiated from conventional nevi in some cases. They can also be pigmented. Many Spitz nevi shows ectazii vascular hemangiomas associated with similar appearance.
Blue nevi are a form of highly pigmented nevi melanocitici. Because of this deep pigmentation colloidal medium refraction (skin) brownish-black pigment shows a blue color. Optical effect is known as the Tyndall phenomenon. Not all blue nevi are blue and some are different shades of gray, brown and black. The clinical aspect varies depending on the pigmentation clinic. Some blue nevi may be totally amelanotici. Because the term blue nevus is not always blue reflective clinical appearance of the lesion for some dermatologists have called blue nevi, nevi according to this melanocitici dendritic morphology. Despite the variability of coloration blue nevi are relatively small, symmetric, typical of benign lesions. Appear on the distal extremities or scalp, but can occur anywhere.
Physical examination involves a careful visual inspection of these lesions. In some cases the examination must be made whole surface of the skin. It will assess the size and color of the lesion and its exact position. Many dermatologists use topographical maps to determine the location of multiple lesions from examination to examination. Photographic documentation may be valuable for patients with multiple nevi. When examining the melanocitici nevi should be evaluated and scalp, palms, soles, interdigital space and external genitalia.
Congenital nevi vary considerably in size and are classified as small <1 cm, 1-3 cm and large / giant> 3cm. Are generally relatively uniform bronze to brown pigmented, especially thin ones. In some congenital nevi cells extend across the epidermis to the subcutaneous fat. These lesions have a color palette and sometimes not well differentiated from melanoma clinical assessment alone. Hamartoamelor melanotici congenital nevi are similar, that contain predominantly melanocytes but also on other elements skin accents. Therefore an increase in the number of hair follicles, this increase follicle size increased or other elements can be observed.
Melanocitici conventional or non-living are generally earned less than 1 cm in diameter and evenly colored. Some melanocitici atypical nevi (dysplastic nevus Clark or type) more than 1 cm in size, especially those on the trunk. Melanotici junctional nevi are in the form of patches or papules fine. Junctional lesions typically varies from brown to black. Derives from their black stain that is commonly hyperpigmented skin surface simultaneously.
Intradermal nevi shows elevation surrounding non-involved skin. They are light colored and vary from tan to brown. Some may have black areas, especially those who have recently been irritated or traumatized. The development of new areas of pigmentation in an intradermal nevus that had a uniform color over the years is a concern. Pigmentation changes may be due to irritation and inflammation of accidental or recent trauma. The possibility of developing a melanoma is also an issue to be considered in differential diagnosticuol. Generally a biopsy for microscopic examination is indicated in this context.
Dysplastic or atypical nevi (also known as Clark nevi) are variants gained relatively flat, soft, papular. Often these injuries shows a similar morphology eye-fried egg, with a central area and the surrounding area macular papular with different pigmentation. Clark nevi appear in the model family. Those affected may also tens or hundreds of injuries. People with this type of nevus of European ancestry, gernami, British, Russian, Polish. Most of them have thin skin, light and celtic genes. Some people have only a few atypical nevi, and their risk of melanoma may not be increased compared to those without such nevi. People with a large number of nevi> 100 have a very high risk of melanoma.
Dysplastic nevi usually occur by extension of the lesion side of the intraepidermal component of these lesions that have the appearance of a fried egg and an area surrounding the central macular papular with different pigmentation. Peripheral edge is perceived as removed because of enlargement of the lateral surface of melanocytes.
Spitz nevi vary considerably in size but are generally less than 1 cm in diameter. Many nevi are also associated with epidermal hyperplasia and keratoses due to hyperkeratosis, and some are due for Associations with ectazii Similar vascular hemangiomas. The degree of pigmentation varies also Spitz nevi. A highly pigmented variant, which appears on the lower legs in women refers to Reed Nevus.
Blue nevi are not always blue and can not be at all pigmented. Name of blue nevus is kept for historical reasons. They are higher than in other melanocitici nevi, measuring 2 cm or more. They are tough because stromal sclerosis associated with a nodular a reflection of their position deep in the skin. Can be black, gray or blue.