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部分无牙症是一种先天性外胚层发育不良病,本症少见,我科自1979年以来遇到5例,皆属同一家族,与遗传有关,现报道如下: 一、家谱调查情况: 调查了本家族四代共61人,近三代中患本症者14例,男性13例,女性1例;另有反(牙合)4例,男性1例,女性3例;有携带基因而无症状者1例。据查第Ⅰ代已故,只知女方胞兄为反(牙合),已无后代。第Ⅱ代患本症者1例,反(牙合)2例。第Ⅲ代患本症者3例,(牙合)反2例,第Ⅲ代(3),女性,无临床症状,生一子患有本症。第Ⅳ代患本症者10例。如第
Part of toothless is a congenital ectodermal dysplasia, rare disease, our department has encountered five cases since 1979, all belong to the same family, and genetic, are reported as follows: First, the genealogy survey: survey The family of four generations of a total of 61 people in the past three generations of the disease in 14 cases, 13 males and 1 females; another anti (occlusion) in 4 cases, 1 males and 3 females; carrying genes without Symptoms in 1 case. According to the investigation of the first generation of the deceased, only to know the female brother of the male anti (occlusal), no offspring. The second generation of patients with this disease in 1 case, anti (occlusion) in 2 cases. The third generation of patients with this disease in 3 cases, (occlusion) anti-2 cases, the third generation (3), women, no clinical symptoms, a child with the disease. The fourth generation of patients with this disease in 10 cases. As the first