问题
单项选择题
患者女，38岁，双颊黏膜白色病变1年。活检标本见上皮萎缩，表面不全角化，上皮钉突呈不规则延长，基底细胞层液化变性，局部可见上皮下疱，固有层内近上皮区域见淋巴细胞浸润带。病理诊断应为
A．慢性盘状红斑狼疮
B．寻常性大疱疮
C．扁平苔藓
D．良性黏膜类天疱疮
E．白念珠菌病
答案
参考答案：C
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患者女，38岁，双颊黏膜白色病变1年。活检标本见上皮萎缩，表面不全角化，上皮钉突呈不规则延长，基底细胞层液化变性，局部可见上皮下疱，固有层内近上皮区域见淋巴细胞浸润带。病理诊断应为
A．慢性盘状红斑狼疮
B．寻常性大疱疮
C．扁平苔藓
D．良性黏膜类天疱疮
E．白念珠菌病
参考答案：C
| The most popular organic gem is the pearl. A pearl is the response of a marine mollusk to the presence of an irritating impurity accidentally introduced into its body; a cultured pearl is the result of the intentional insertion of a mother-of-pearl bead into a live mollusk. Whether introduced accidentally or intentionally, the pearl-making process is the same: the mollusk coats the irritant with a substance called nacre. Nacre is composed chiefly of calcium carbonate. Because very few natural pearls are now on the market, most pearls used in free jewelry are cultured. These include "Biwa" pearls and most other freshwater pearls. Cultured pearls are not easily distinguished from natural pearls except by an expert. |
The difference between a pearl and a cultured pearl is the nature of the ______.
A．color
B．introduction of the irritating impurity
C．coating material
D．irritating impurity