Vertebral arch anomaly Narrow vertebral interpedicular distance Narrowing of interpediculate distances Narrow interpedicular space HP:0008450 HP:0008474 A reduction of the distance between vertebral pedicles, which are the two short, thick processes, which project backward, one on either side, from the upper part of the vertebral body, at the junction of its posterior and lateral surfaces. Interpedicular narrowing Narrow interpediculate distances HP:0008448 HP:0008426