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维甲酸类对多潜能上皮细胞正常分化为具有特殊功能的细胞(如:支气管分泌粘液的纤毛细胞,膀胱的移行细胞,皮肤的角朊细胞)是必需的。一些在动物和人的研究提示。维甲酸类缺乏能增加患癌的易感性;合成维甲酸类能加强生理性细胞自身修复机制,使癌变停止。芳香维甲酸已广泛用于治疗角化过度性皮肤病和癌前病及癌症(白斑和基底细胞癌)。作者应用芳香维甲酸治疗4例角化棘皮瘤获得良效。4例患者的损害均发生于颜面部,大小2～3cm,例4同时患有一个基底细胞癌和8个日光性
Retinoids are essential for the normal differentiation of pluripotent epithelial cells into cells with special functions (eg, cilia cells that secrete mucus in the bronchi, transitional cells in the bladder, and keratinocytes in the skin). Some tips on animal and human research. The lack of retinoids can increase the susceptibility to cancer; the synthesis of retinoids can strengthen the physiological cellular self-repair mechanism and stop canceration. Aromatic retinoic acid has been widely used in the treatment of hyperkeratotic skin diseases and precancerous conditions and cancers (leukoplasia and basal cell carcinoma). The authors used aromatic retinoic acid to treat 4 cases of keratoacanthoma. The lesions of 4 patients all occurred on the face and face, with a size of 2 to 3 cm. Case 4 also had one basal cell carcinoma and 8 suns.