MR Imaging of Intra- and Periarticular Cyst-Like Lesions of the Knee Joint in Workers with Occupational Kneeling

Abstract EN

Objective.

To determine the risk of intra- and periarticular cyst-like lesions of the knee joint in occupational kneeling.

Methods.

Magnetic resonance imaging of both knees (n=282) was conducted in 92 male floor layers and 49 male graphic designers (referents), with a mean age of 55.6 years (range 42–70 years).

The prevalence of cyst-like lesions was computed among floor layers and graphic designers, respectively, and associations with occupation summarized by odds ratio (OR) with 95% confidence intervals (CIs).

Using logistic regression, models were adjusted for age, body mass index, knee injuries, and knee-straining sports.

Results.

Floor layers had a significantly higher prevalence of cyst-like lesions in the posterior part of the knee joint compared to graphic designers (OR 2.70, 95% CI 1.50–4.84).

Floor layers also had a higher prevalence of fluid collections in the popliteus tendon recess (OR 2.17, 95% CI 0.99–4.77) and large cystic lesions of the popliteus muscle (OR 3.83, 95% CI 0.78–18.89).

The prevalence of cystic lesions in the anterior part of the knee joint was low among floor layers (8.7%) and there was no significant difference between the two trade groups (P=0.34).

Conclusions.

Occupational kneeling increases the risk of cyst-like lesions in the posterior part of the knee joint.