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The Journal of Bone and Joint Surgery 78:278-80 (1996)
© 1996 The Journal of Bone and Joint Surgery, Inc.

Recurrent Horizontal Dislocation of the Patella in the Sagittal Plane. A Case Report*

NOBUYUKI YOSHINO, M.D.{dagger}, SHINRO TAKAI, M.D.{dagger}, SHINICHIRO NAKAMURA, M.D.{dagger}, TAKUHIRO MANABE, M.D.{dagger} and YASUSUKE HIRASAWA, M.D.{dagger}, KYOTO, JAPAN

Investigation performed at the Department of Orthopaedic Surgery, Kyoto Prefectural University of Medicine, Kyoto


   Introduction
 
Dislocation of the patella usually occurs to the lateral side, in the coronal plane. Horizontal dislocation of the patella in the sagittal plane is rare; we are aware of thirty-five previously reported cases, all of which involved dislocation into the intra-articular space between the femur and tibia3-6,10,12. The patient in the present report had a dislocation of the patella in which the patella rotated in the sagittal plane to lie horizontally at the level of the suprapatellar pouch without rupture of the patellar ligament. To our knowledge, there is no previous report of this condition having been treated operatively1,7,8,14.


   Case Report
 
In December 1992, a sixty-five-year-old man tripped and fell while walking, after which he found the right knee to be locked in a slightly flexed position, with a prominence anteriorly at the level of the patella and a concavity distal to the prominence. He was able to manipulate the . . . [Full Text of this Article]


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