ANOMALOUS CAPILLARY PLEXUS IN THE SCALA TYMPANI

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Abstract
A case in which there was an anomalous capillary plexus in the scala tympani of the human cochlea is here reported. The plexus was found in the right ear of a Negro man aged 62. It was located in the basal coil 8.9 mm. within the round window. The condition apparently was unilateral. In the scali tympani, about half way between the basilar membrane and the lower border of the scala, there occurred a union of two capillaries. These capillaries were the vessel under the labium spirale (inner spiral vessel) illustrated in figure 1, and the vessel under the tunnel of Corti (outer spiral vessel) seen in figures 2 and 3. The caliber of the vessel formed was not appreciably altered after the union of the two component vessels. At the point of union the vessel made an angular turn and proceeded toward the lower border of the spiral ligament.