Enchondroma

Question 1

What is the most common bone tumor of the hand?

Answer 1

Enchondroma (60%)
distal femur (20%), proximal humerus (10%)

Question 2

What is an enchondroma?

Answer 2

Benging cartilagenous tumor composed of hyaline cartilage; its origin is from the physis

Question 3

What is defined by multiple enchondromas and soft-tissue angioma?

Answer 3

Maffucci’s syndrome
100% malignant transformation
Ollier’s is only the enchondromas and has <30% malignant transformation
Risk of transformation of solitary enchondroma is 1%

Question 4

What is the treatment for an enchondroma that has interval change in apperance?

Answer 4

Intralesional currettage with bone grafting; also tx of choice for fracture

Question 5

What can distinguish low grade chondrosarcoma from an enchondroma?

Answer 5

as opposed to enchondromas, low-grade chondrosarcomas are typically painful, larger (>5cm), and associated with cortical endosteal scalloping and lysis