To the Editor:
—There is nothing new under the sun. In The Journal, Feb. 7, 1920, p. 388, there appeared under the heading "Hitherto Undescribed Dislocation of the Patella Endwise," a report of a case of horizontal rotation of the patella due to laceration of the quadriceps tendon. Such an injury has not hitherto escaped observation and description, as the author would indicate, but, on the contrary, is described in many textbooks on general surgery and in monographs on fractures and dislocations. Such cases are very rare, but have been known to occur for many years. Reference to this injury will be found in Stewart's "Manual on Surgery," page 316; Wharton and Curtis' "Practice of Surgery," page 598, Keen's "Surgery," Volume II, page 427; Wyeth's "Surgery," page 200; and it is described very fully and reported cases are cited in Stimson's work on "Fractures and Dislocations."