Reactive Bone Formation

Question 1

What is reactive bone formation?

Answer 1

Intramembranous bone formed in response to stress on bone or soft tissue

Question 2

What typical radiologic finding is observed during reactive bone formation?

Answer 2

Sunburst pattern

Question 3

What occurs on when an onion skin pattern is observed?

Answer 3

Progressive layering of the periosteum

Question 4

What type of bone is laid down resulting from a rapid stress? Gradual stress?

Answer 4

Woven bone; Lamellar bone

Question 5

What is Heterotopic Ossification?

Answer 5

Formation of reactive bone in extraskeletal sites

Question 6

WHat is the name of the disorder in which massive deposits of bone is deposited around multiple joints?

Answer 6

Fibrodysplasia ossificans progressiva

Question 7

What is the name of the condition in which calcium salts are deposited in soft tissues?

Answer 7

Heterotopic calcification

Question 8

What are the two types of heterotopic calcification?

Answer 8

1. Metastatic - WHen increazsed levels of calcium-phosphate product
2. Dystrophic - calcification in abnormal or damaged tissue

Question 9

What is the name of the condition in which reactive bone formation forms in the muscle after injury?

Answer 9

Myositis Ossificans

Question 10

How is myositis ossifican s distinguished from a neoplasm?

Answer 10

In MO, bone matures peripherally, whereas it is immature or not formed at all in the center of the lesion; In a neoplasm, the lesion is most mature centrally