Ivory vertebra sign

Overview
Increase in opacity of a vertebral body that retains its size and contours, with no change in the opacity and size of adjacent intervertebral disks.

Increased opacity may be diffuse and homogeneous and involve most or all of the vertebral body, giving it a white appearance.

Differential diagnosis for an ivory vertebra

 * Osteoblastic metastases
 * Lymphoma
 * Paget's disease
 * Fluorosis
 * Osteopetrosis

Diagnostic Findings
Increase in opacity of a vertebral body that retains its size and contours, with no change in the opacity and size of adjacent intervertebral disks.

Images
Image courtesy of RadsWiki