Misplaced Sack of Marbles
The little sack of marbles just right of the center in this side view of a lumbar spine is a gallbladder. It is misplaced by about 8 inches. Due to its being in the wrong place, it could not empty properly. It accumulated cholesterol stones that calcified, so we are left with a sack of marbles--and a gallbladder that has not functioned in years.
The real problem is the badly degenerative disc at the left side of the image. Though a source of pain prior to conservative care, it is virtually pain free now. Flexion distraction and deep ultrasound work wonders in cases like this.