How does mole nucleus fall off oneself?

summary

Nevus can be divided into broad sense and narrow sense, including various congenital and acquired melanocytic nevus, sebaceous nevus, etc. Medical "nevus" is a narrow sense, also known as nevus cell nevus, pigmented nevus, melanocytic nevus or common acquired melanocytic nevus, excluding congenital melanocytic nevus. Nevus is the most common benign skin tumor in human. It is the skin manifestation caused by the increase of melanocytes in epidermis and dermis. According to the location of nevus cells in the skin, they can be divided into junctional nevus, mixed nevus and intradermal nevus. Flat lesions showed borderline nevus, slightly higher lesions were mostly mixed nevus, while papilloma like lesions and almost all hemispherical and pedicled lesions were intradermal nevus.

How does mole nucleus fall off oneself?

It often appears after two years old. It can occur in the skin and mucous membrane of any part of the body. The lesions are flat or slightly raised macular or macular papules, which can also be hemispherical, papillomatous or pedicled. The surface is smooth, with or without hair, and the number can be single, several to dozens. Because of the different types and contents of pigment in nevus cells, the lesions can be brown, blue black or black, while the non pigmented lesions are mostly skin color. According to the location of nevus cells in the skin, they can be divided into junctional nevus, mixed nevus and intradermal nevus. Flat lesions showed borderline nevus, slightly higher lesions were mostly mixed nevus, while papilloma like lesions and almost all hemispherical and pedicled lesions were intradermal nevus. The progress of this disease is slow, and most of them have no conscious symptoms.

The appearance of atypical nevus may become malignant, such as very black nevus, uneven pigment, uneven or irregular edge, unclear boundary, left and right asymmetry, statistically larger than 5mm in diameter. The nevus growing in nail groove, nail, limb, oral mucosa, conjunctiva, vagina and prepuce are more likely to become malignant melanoma than nevus growing in other places.

To differentiate from diseases with pigmented skin lesions, such as senile black spot: it occurs in the exposed parts of the body of middle-aged and elderly people, such as cheek, neck, back of hand and forearm. It is mainly distributed in brown, small round, oval or irregular, smooth or slightly higher than the skin. Histological examination showed that the number of normal melanocytes increased without malignant transformation.

matters needing attention

Generally, no treatment is needed. For the junctional nevus and mixed nevus that occur in the palm and plantar, lumbar, axillary, groin and other easily rubbed parts, surgical resection should be considered when the following conditions occur: 1; ② The color turns black or mottled; ③ Erosion, ulcer, bleeding or swelling appeared on the surface; ④ Conscious pain or itching; ⑤ There were satellite lesions around. It can also be treated by laser.