Kapetanos G A
Clin Orthop Relat Res. 1984 Jun(186):220-3.
Polydactyly is an entity of great etiologic heterogeneity, and many facts about its genetics remain unknown. Therefore, the relative terminology and classification in the literature are rather obscure. Mixed polydactyly, i.e., polydactyly with both preaxial and postaxial involvement in the same person, is very rare, and crossed polydactyly is even more so. A seven-year-old girl with six fingers on each hand and seven-toed feet, lower-mixed and crossed polydactyly with syndactyly, underwent operation mainly for cosmetic reasons. The report of this rare case confirms the great variability and expressivity of this malformation and suggests that large statistical studies on this subject in the future are warranted.
多指畸形是一种病因高度异质性的病症，关于其遗传学的许多事实仍不为人知。因此，文献中的相关术语和分类相当模糊。混合型多指畸形，即同一个人同时存在轴前和轴后多指畸形的情况非常罕见，而交叉型多指畸形则更为罕见。一名七岁女童双手各有六指、双脚各有七趾，属于低位混合型交叉多指并指畸形，主要出于美容原因接受了手术。这一罕见病例的报告证实了这种畸形具有极大的变异性和表现度，并表明未来有必要针对该主题开展大规模的统计研究。
