Kump's hump is the site of first closure of the physis and should not be mistake for a fracture. On MRI, the normal loss of cartilaginous signal intensity of the physis begins at Kump's hump.
Kump's hump can also present a pitfall on MRI. The undulation at this location can simulate physeal closure on T1-weighted images, a phenomenon that is due to partial volume averaging of the physis with the adjacent epiphysis and metaphysis.
- Chung T, Jaramillo D. Normal maturing distal tibia and fibula: changes with age at MR imaging. Radiology. 1995 Jan;194(1):227-32.
- Keats TE and Anderson MW. Atlas of Normal Roentgen Variants That May Simulate Disease. 8th edition, page 812; Mosby (2004).
- Kump WL. Vertical fractures of the distal tibial epiphysis. Am J Roentgenol Radium Ther Nucl Med. 1966 Jul;97(3):676-81.