Abstract
Three ears in two patients of congenital ossicular anomalies without deformities of the external canal and auricle, which suggested the dominant inheritance, were reported. The lack of long process of incus and adhesion of a small oval bone at the head of stapes instead of the lenticular process were observed in three ears. Stapes and malleus handle showed normal structure, and footplates of stapes were mobile. From these surgical findings, it was suggested that these anomalies were caused by disturbance of conjunction of stapedial lobe and incudal genesis in the sixth or seventh embryonic week. The lenticular process was supposed to be developed from stapedial lobe.
