In recent years considerable attention has been given to injuries of the upper femoral epiphysis, particularly to that type of injury known as "slipped" epiphysis. Orthopedic literature contains a considerable number of articles on injuries and displacement of the upper femoral epiphysis. Likewise, at practically every orthopedic conference or convention, cases of upper epiphysial injuries are demonstrated. At these meetings, however, I have never seen demonstrated nor heard mention of a case of injury to the lower femoral epiphysis.
Injury to the lower femoral epiphysis, especially avulsion with displacement, apparently is so rare that standard textbooks, such as those of Albee,1 Jones and Lovett,2 and Whitman,3 make no mention of this type of injury. Scudder,4 in his book (1926) on fractures, states that separation of the lower femoral epiphysis is extremely rare and occurs in children about 10 years of age. He further states that half
KURLANDER JJ. SLIPPING OF THE LOWER FEMORAL EPIPHYSIS. JAMA. 1931;96(7):513–517. doi:10.1001/jama.1931.02720330033009