患者,女,29岁,已婚,因面颈部色素沉着16年、鼻根部肿块2月余,于1986年12月21日入院。患者从13岁开始即在面颈部、两上肢、胸上部出现斑点状色素沉着,伴有瘙痒。日晒后色素加深,皮肤变黑,逐年加重。近2月鼻根部出现一肿物,起始时如绿豆大小,微痒、不痛,生长 The patient, female, 29 years old, was married. He was admitted to the hospital on December 21, 1986 because he had face and neck pigmentation for 16 years and his nose root mass was more than 2 months. From the age of 13, the patient developed macular pigmentation on the face and neck, upper limbs, and upper chest with pruritus. After darkening, the pigment deepens, the skin becomes darker, and it gets heavier year by year. A tumor appeared in the root of the nose in the first 2 months. The size of the mung bean at the beginning was slightly itchy and painless.