nevus cells
Introduction
Introduction Nevus ceIl nevi, also known as me1anocytic ne-vus, is the most common benign tumor in humans and can be present at birth, but often occurs after 2 years of age, with slow progression and no symptoms. . The life cycle of sputum cells usually goes through different stages of development, maturation and aging, and gradually moves from the epidermis to the dermis as the age increases. Depending on the location of the sputum cells in the skin, sputum cells are usually divided into three types: junction ridge, mixed sputum and intradermal sputum.
Cause
Cause
Cellular sputum is a benign tumor. This symptom is due to the long development of this tumor.
Examine
an examination
Related inspection
Skin color skin cancer detection skin elasticity check
According to clinical symptoms, combined with histopathological diagnosis is not difficult. The diagnosis of aversion is determined by pathological examination after complete resection of pigmented nevus.
Diagnosis
Differential diagnosis
1. Freckles are found on the nose, cheeks, back of the hand and upper part of the torso. Skin lesions are pale yellow, yellowish brown or brown spots, round, oval or irregular, such as needle tip to grain size. Spots do not fuse. The main pathological change is an increase in melanin in the basal cell layer, while the number of melanocytes does not increase.
2. Seborrheic keratosis is a flat and well-defined patch with a smooth surface or papilloma, which can form a layer of oily thick sputum. The follicular horn plug is one of the important features, and sometimes even a small early rash has been seen clearly.
3. Malignant melanoma is often asymmetrical, the boundary is unclear, the edge is not smooth, the color is uneven, the development is rapid, it is easy to rupture, hemorrhage, irregular scar formation, histology shows sputum cell abnormality. The central dark spot and changes in diopter are an important symptom of choroidal malignant melanoma.
According to clinical symptoms, combined with histopathological diagnosis is not difficult. The diagnosis of aversion is determined by pathological examination after complete resection of pigmented nevus.
