Plica sinovial de joelho em cadáveres de recém-nascidos: comparação entre Anatomio e Artro-TC / Synovial knee plica in newborn cadaver knee: a comparasion between Anatomy and Arthro-TC

RESUMO

Fifty-two newborn knees were used to verify the validity of the arthro-TC of double contrast for the diagnosis of normal synovial plicas, aiming at classifying and verifying their quantitative incidence and ethnic distribution. The plica synovialis mediopatellaris was identified in brown (60 percent), white (40 percent) and black races (9 percent) in this study. The incidence in black people was quite low as compared to white and brown people. The most commonly found folds were the plica synovialis infrapatellaris (69 percent) followed by the plica synovialis suprapatellaris (44 percent) and plica synovialis mediopatellaris (31 percent). Plicas were not found in 6 percent of the knees. The communication of bursa patellares with the articulation of the knee is present at birth in 85 percent of newborns. Identification of plica synovialis infrapatellaris was difficult because it is covered by abundant fat tissue. Arthro-TC was studied and analyzed by six observers, three radiologists and three orthopedic surgeons. The results showed a medium sensibility of 72 percent and a medium specificity of 60 percent for radiologist versus 89 percent and 61 percent for orthopedist surgeons, respectively.