Benign melanocytic nevus are common, some of which remain unchanged for life and do not affect health; A few may turn into melanoma, which is a life-threatening malignant tumor.
Early detection of malignant signals of pigmented nevus and timely surgical treatment can prevent melanoma. Once the malignant signal is found, it should be surgically removed in time, and its cure rate is very high. The following eight changes are malignant signals of pigmented nevus:
First, the color of benign pigmented nevus is uniform, dark brown or black, and there is no other noise. There are many colors of malignant transformation, besides dark brown and black, red, pink, white and blue can also appear, which can spread from the edge of the mole to the surrounding normal skin.
Second, the size of benign pigmented nevus is generally less than 6 mm in diameter. If it suddenly expands or continues to increase, it may be a malignant signal.
Thirdly, the shape of benign nevus is round, with clear boundary with normal skin, regular edge, flat or slightly raised. When malignant, the edge is irregular, which can be serrated or other shapes, and the pigment often spreads to the surrounding normal skin. The shape of malignant transformation is not round, but asymmetrical and irregular.
Fourth, the uplift changes benign cockroaches are generally flat or slightly raised. If the skin suddenly bulges obviously, especially on the originally flat pigmented nevus, it is often a malignant signal.
Verb (abbreviation of verb) changes the surface of benign pigmented nevus. The surface is smooth and smooth, and there are no other pathological phenomena, such as desquamation, erosion, exudation, scabbing, ulceration, bleeding, etc., which are often signs of malignant transformation.
Sixth, the surrounding skin changes When the pigmented nevus is in a benign state, the surrounding skin is completely normal, such as flushing and swelling, especially when there is a small and fast "satellite pigment fast" around the nevus, it should be considered as the beginning of malignant transformation.
Seven, skin sensation changes Benign pigmented nevus feels the same as normal skin. If you have abnormal feelings, such as itching, tenderness and conscious pain, you should pay close attention to the tendency of malignant transformation.
Eight, hardness changes Benign moles have uniform hardness and soft texture. If it suddenly becomes "soft" or "brittle", it is mostly a malignant signal.
Anyone with benign pigmented nevus, especially those over 40 years old, should pay close attention to the changes of nevus. Moles growing on the back, waist, buttocks and other body parts can be observed in the mirror or checked regularly by a doctor. If one or more of the above eight changes occur, we should be vigilant and seek medical advice in time.