A 56-year old man presented with bony pain. X-ray skull lateral view shows:
Correct Answer: Hyper osteosis frontalis
Description: Ref. Grainger and Allison's Diagnostic Radiology. Page. 483
Pagets disease of bone affects each person differently . It includes :
1 Bones : Pain in the affected bones is the most common symptom of pagets disease of bone.
Skull in Pagets disease
osteoporosis circumscripta: large, well-defined lytic lesion
cotton wool appearance: mixed lytic and sclerotic lesions of the skull
diploic widening: both inner and outer calvarial tables are involved, with the former usually more extensively affected
Tam o'Shanter sign: frontal bone enlargement, with the appearance of the skull falling over the facial bones, like a Tam o' Shanter hat
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