Lentigo

Lentigo - appearance of pigmented nevus - flat or slightly above the level of the skin stains of dark-brown color 1-2 ml in diameter.
Youth lentigo begins in childhood, the elements are placed on different areas of the skin; meet limited and widespread forms. Senile lentigo develops on the back surface of hands, forearms and face. Malignant degeneration observed very rarely. Special treatment is not required.

Lentigo (from lat. lentigo - lenticular spot; freckles) - limited hyperpigmentation of the skin in the form of brown or black spots, located mostly in open areas of skin.
The spots have round or elongated shape; their size is from 2 to 6 mm in diameter, may be slightly elevated above the level of the skin and become tangible palpation. Rich rash Lentigo often termed "lentigines". Lentigo more likely to occur in older people (senile freckles), but can be and adolescents.
Siemens (N. W. Siemens) distinguishes three forms of L.: normal, spherical one hair in Central and L. on the leg (a value of up to pea). The latter type correctly attributed to the fibroids skin. Pigmented nevus different from L. typically asymmetric location, harsh limitations and the lack of family predilection. L. may in some cases become malignant.
Histological examination there longer epidermal processes, they may deviate perceptible outgrowths. In basalt layer is a significant concentration of pigment (which can be found in the dermis), the number of so-called light cells. When L. in the elderly - basophilic degeneration of collagen in the upper part of the dermis.
Allocate a special form Lentigo - limited precancerous melanosis Dubreuil or lentigo maligna. In this form L. arising in old age, mainly women, there are dark-brown, black or blue-black spots in the magnitude of lentils to a child's hands. The rash may be on the face, chest, mucous membrane of the mouth and other parts of the skin. Spots on the surface appear items, reminiscent of old warts, or occur atrophic changes of the surface. The affected areas increase. Indicators malignant degeneration are: the appearance of the peripheral growth, infiltration and the formation of blue-black knots.
Periorbitalny lentigines with gastrointestinal polyposis [lentiginosis periorificialis et polyposis gastrointestinalis, syndrome Patta - Jeghers - Touraine (Peutz - Jeghers - Touraine)]. This syndrome is manifested multiple pigment spots around the mouth, lips and mucous membranes of the oral cavity. Pigment spots combined with polyposis of the stomach, duodenum, thin or thick guts. Polyposis is clinically manifested by pain in the abdomen, nausea, bloody vomiting and bloody stool. Sometimes you may ileus.
When centripetalism derationsrat lentiginosa Touraine (lentiginosis centrofacialis dysraphica) simultaneously with lentigenes spots, located on the nose, cheeks, and other areas, there are various neuropsychiatric disorders up to idiocy, mental retardation and other Believe that this form of L. refers to the innate neuroectodermal.
Treatment of common forms Lentigo - electrocoagulation, cryotherapy spots (from cosmetic reasons). Avoid exposure to intense sun. For suspected malignancy L. the patient should be referred to the Oncology Institute.