A 68-year-old athletic @entity1 presented to our institution in January 2002 with a several-month history of progressing complaints of @entity158 , @entity4 , and @entity393 in the right knee. These manifestations had begun the previous July during a game of tennis. She experienced persisting @entity158 and recurring effusions. Because the @entity1 had been residing in another state between July and January, rheumatologic and orthopaedic evaluations of the knee, including a magnetic resonance imaging (MRI), had been performed at a geographically distant (but affiliated) institution. The resulting presumptive diagnosis was a "wear and tear" @entity179 of the knee. A program of anti-inflammatory medication and physical therapy was begun for several months but produced no therapeutic benefit by the time the @entity1 presented at our institution. After examination confirmed marked losses of both flexion and extension of the knee, effusion, and exquisite medial joint tenderness, an MRI was repeated, using intra-articular @entity2287 as a contrast agent. It revealed an intra-articular mass encircling the medial and posterior extents of the medial femoral condyle. An arthroscopic multiportal excisional biopsy was performed. It revealed the existence of a @entity3291 . The @entity1 recovered most of the range of motion during the next several months, and the effusion and severe @entity158 gradually dissipated. The @entity1 was subsequently followed by sequential physical examinations and MRIs, performed at increasing intervals of time, without recurrence of a mass or of her flagrant symptoms in the first year post surgery. Though the @entity1 's diagnosis was established and treatment outcome was satisfactory, many issues were brought up in this case regarding most appropriate selection of diagnostic tests and treatment approaches.

XXXX : a rare cause of painful restricted motion of the knee.

@entity1 :: ('9606', 'Species') :: ['woman', 'patient'] @entity4 :: ('MESH:D004487', 'Disease') :: ['swelling'] @entity3291 :: ('MESH:D009232', 'Disease') :: ['juxta-articular myxoma'] @entity179 :: ('MESH:D019636', 'Disease') :: ['degenerative articular disorder'] @entity158 :: ('MESH:D010146', 'Disease') :: ['pain'] @entity393 :: ('MESH:D034381', 'Disease') :: ['loss of motion'] @entity2287 :: ('MESH:D005682', 'Chemical') :: ['gadolinium']
@entity3291 :: (MESH:D009232,Disease) :: ['Juxta-articular myxoma']
