What does the following mean? *Mild heterogeneity of bone marrow signal. *Mild loss of disc hydration at L2-3, L4-5, and L5-S levels. *L2 vertebral body hemangiomas. *Mild facet arthroscopic seen bilaterally....T12-L1, L1-2, L2-3, L3-4, L4-5, L5-S1. *Right lateral recess focal disc bulge that partially effaces the ventral the a space by 0.3 cm and mildly posteriorly displaces the right transiting S1 nerve root.