患者女,26岁。主诉:左侧乳房先天性小痣迅速增大1年。现病史:患者出生时左侧乳房内侧即有一芝麻大黑痣,不隆起于皮肤,皮疹随年龄增长而缓慢增大。近1年来皮疹面积迅速扩大,形成表面色素不均匀的黑褐色斑片,遂于2013年7月1日来我科就诊。患者发病以来皮损局部无糜烂、破溃及渗出,无瘙痒、疼痛等自觉症状,无发热、体重减轻等全身症状。 Female patient, 26 years old. Complaint: left breast congenital mole increased rapidly for 1 year. Current history: the patient was born on the inside of the left breast with a sesame mole, does not rise to the skin, the rash increases slowly with age. Rash area rapidly expanded in the past year, the formation of uneven surface dark brown patches, then in July 1, 2013 to our department. Lesions in patients since the onset of local no erosion, ulceration and exudation, no itching, pain and other symptoms, no fever, weight loss and other systemic symptoms.