Rain drop skull appearance is seen
Ref. Grainger and Allison's Diagnostic Radiology. Page. 409
 
MULTIPLE MYELOMA –RAIN DROP APPERANCE /PUNCHED OUT LESIONS IN THE SKULL
Imp radiological features –

Expansile osteolytic lesions associated with soft tissue masses
Diffuse osteolysis or generalised osteoporosis
Periosteal new bone formation is characteristically absent
Spine –diffuse lytic lesions
Multiple myeloma
Eosinophilic granuloma
Pagets disease
Sickle cell anemia