Hereditary phalangeal agenesis showing dominant Mendelian characteristics.

A healthy baby, six months old, was brought to the Duchess of York Hospital, Manchester, in July, 1946, suffering from phimosis. It was noticed that his hands were deformed. His mother, formerly a nurse, was herself normal, but stated that the child's father and grandfather and -several other relatives were similarly affected. She was, therefore, asked to collect further information, from which the accompanying genealogical tree was compiled.