Spinal canal stenosis Spinal stenosis with reduced interpedicular distance An abnormal narrowing of the spinal canal related to a reduction in the interpedicular distance (i.e., the distance measured between the pedicles on frontal [coronal] imaging). HP:0005733 Spinal stenosis due to short pedicles HP:0004597 UMLS:C4021625 The pedicles are two short, thick processes that connect the body of the vertebrae to the arch.