Presentation
Illustration purposes from three different cases.

a. Sclerotic expansile scapula
b. Diffuse sclerotic fluffy lesions like cotton wool
c. Diaphyseal lucent lesion like a blade of grass
Case Discussion
Three forms of one disease - Paget disease of the bone.
a. Classical appearances in an unusual location in the scapula
Original case: http://radiopaedia.org/cases/paget-disease-of-the-scapula
b. Cotton wool appearances of the skull
Original case: http://radiopaedia.org/cases/paget-disease-cotton-wool-skull
c. Blade of grass appearance of acute Paget disease
Original case: http://radiopaedia.org/cases/paget-disease-with-blade-of-grass-sign
Cases from Frank Gaillard, Ian Bickle and Andrew Dixon.