Paget’s Disease
Tam o’ Shanter sign (skull) | Radiology Reference Article | Radiopaedia.org
Markers
- ↑ serum alkaline phosphatase
- Normal calcium and phosphorus levels
- ↑ urine hydroxyproline
Radiographic features
Skull
→ Osteoporosis circumscripta, Cotton wool appearance, Diploic widening
→ Tam o’ shanter sign: platybasia and basilar invagination
Spine
→ Picture frame sign, Squaring of vertebrae, Vertical trabecular thickening
Pelvis
→ Pelvic brim sign and leads to obliteration of köhler’s teardrop
→ Acetabular protrusion
Long bones
→ Blade of grass or candle flame sign, Lateral curvature of femur
→ Anterior curvature of the tibia
Picture frame vertebral body | Radiology Reference Article | Radiopaedia.orgThe Blade of Grass Sign | RadiologyPelvic Brim Sign & obliteration of Köhler’s teardrop in pagetoid pelvis - cortical thickening and sclerosis of the iliopectineal and ilioisc… | Pelvis, Brim, Signs