OBJECTIVE: To evaluate the prevalence and describe the findings of complicated @entity8060 observed in a large series of knee MR studies. MATERIALS AND METHODS: A total of 145 @entity8060 were detected out of a series of 382 (38%) consecutive @entity1 with knee MR studies performed. Cysts were classified as simple (smooth walls, homogeneous content, signal intensity similar to that of the synovial fluid and with no changes in the surrounding tissues) or complicated (changes of wall, changes in the intensity of the content signal, presence of free bodies or changes in the surrounding tissues). Complications were detected in ten (6.9%) cysts, which were confirmed by means of direct observation (arthroscopy or surgery, n = 9 cases) or by means of clinical evidence with follow-up (n = 1 case). RESULTS: No differences were detected in sex distribution between simple and complicated cysts (chi 2, p = 0.09), although a statistically significant relationship was indeed detected between the presence of complications with older age (p = 0.003) and presence of @entity75 (p = 0.019). In five @entity1 a @entity397 of the Baker cyst was found, in four intracystic free bodies, and in one case @entity1362 with intracystic foci. Only two out of the five @entity1 with @entity397 had @entity2268 symptoms, the remaining of ruptures being asymptomatic. In three out of the four @entity1 with free intracystic bodies they were considered secondary to @entity179 , the other case having @entity11665 . CONCLUSIONS: @entity8060 are common and usually are not associated with complications. In our series, a prevalence of 6.8% of complicated cysts was observed, either by their contents or wall changes. The most common complication is @entity397 (50% of complicated cysts) which can be asymptomatic in up to 80% of cases, followed by free intracystic bodies (40% of complications) usually of degenerative origin. The complication is statistically associated with @entity397 and aged @entity1 .

[Prevalence and characteristics of complications of XXXX by MRI].

@entity1 :: ('9606', 'Species') :: ['patients'] @entity75 :: ('MESH:D001927', 'Disease') :: ['meniscal lesions'] @entity1362 :: ('MESH:D013586', 'Disease') :: ['pigmented villonodular synovitis'] @entity2268 :: ('MESH:D013924', 'Disease') :: ['thrombophlebitis'] @entity11665 :: ('MESH:D015838', 'Disease') :: ['synovial chondromatosis'] @entity397 :: ('MESH:D012421', 'Disease') :: ['rupture', 'cyst rupture', 'meniscal ruptures'] @entity179 :: ('MESH:D019636', 'Disease') :: ['degenerative osteochondral lesions'] @entity8060 :: ('MESH:D011151', 'Disease') :: ['Baker cysts']
@entity8060 :: (MESH:D011151,Disease) :: ['Baker cysts']
