Imaging & Radiology · Skeletal System · Medium
Expansile
Meaning: Describing a lesion that balloons the outline of a bone, usually thinning the cortex.
In practice: Aneurysmal bone cysts and giant cell tumours are classic; renal and thyroid metastases can cause blow-out lesions.
Quick check
Two questions on related imaging & radiology words.
Which word means: Paramagnetic contrast agent injected intravenously to enhance MRI images.
Answer: Gadolinium
Which word means: Resembling cartilage; describes a lesion matrix showing ring-and-arc or popcorn calcification.
Answer: Chondroid
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