Which density descriptor indicates a mixed (lytic-sclerotic) internal structure for a radiographic abnormality?

• A. Totally hypodense
• B. Mixed (lytic-sclerotic)
• C. Totally hyperdense
• D. Amorphous bone

Answer: (B)

Describing the internal pattern of a lesion on radiographs focuses on whether the area is lucent, dense, or a combination. A mixed (lytic-sclerotic) pattern means the lesion contains both radiolucent zones (dark from bone resorption) and radiodense zones (bright from new bone formation or sclerosis) within the same abnormality. This indicates that the process is producing both destruction and reactive bone, rather than being entirely dark or entirely dense. The other descriptors describe more uniform patterns: totally hypodense is all lucent, totally hyperdense is all radiodense, and amorphous bone refers to irregular, nonuniform bone texture without specifying a mixed lucent–dense interior. So the mixed (lytic-sclerotic) descriptor best captures a lesion that has both lytic and sclerotic components.