Question

what is the named sign defined by fluffy periosteal new bone formation adjacent to erosions?
sausage pattern
mouse ears sign
gull wings sign
bamboo sign

Explanation:

In medical - orthopedic imaging, the mouse ears sign is defined by fluffy periosteal new bone formation adjacent to erosions. The sausage pattern is related to dactylitis, the gull wings sign is associated with hip joint changes, and the bamboo sign is seen in ankylosing spondylitis related to vertebral changes.

Answer:

mouse ears sign