<unk>  Cranii refers to a highly circumscribed (focal) lytic lesion of the skull bone as seen on X-ray in patients with Paget's disease of bones. This focal lesion can be fairly large. This finding is highly specific for Paget's disease of bones.
Osteoporosis circumscripta
Senile osteoporosis
Juvenile osteoporosis
Osteitis fibrosa cystica
Gerodermia osteodysplastica
Osteopetrosis
Corneodermatoosseous syndrome
Acne mechanica