Although an intra-articular ganglion of the knee joint is frequently found in meniscal fibrous tissue, a ganalion of the posterio cruciate ligament (PCL) is very rarelyseen, with no cases with recurrent hemarthrosis previously reported.
A 32-year-old man was admitted to our hospital complaining of knee pain, restriction of knee motion and hemarthrosis.
Radiologically there were no findings in the knee joint. An arthrogram and MRI showed a cystic lenion (30mm by 16mm) on the PCL, which was suspected an being an intra-articular ganglion.
At arthroscopy a cystic lesion was found on the PCL and upon pushing it with a probe, clear mucinous fluid came out.
All the patient's sympotoms improved after resection of the cystic lesion under arthroscopy.
However the cause of the hemarthrosis was not determined, microtrauma and a ganglion may induce bleeding of the synovial tissue.
