Department of Radiology, University Hospital North Norway, Breivika, 9038, Tromsø, Norway.
Pediatr Radiol. 2012 Jul;42(7):791-8. doi: 10.1007/s00247-012-2354-x. Epub 2012 Mar 20.
The presence of erosions is used for diagnosis and monitoring of disease activity in juvenile idiopathic arthritis (JIA). Assessment of carpal bone erosions in children is challenging due to lack of normal references.
To define normal appearances of bony depressions in the wrist on radiographs and MRI.
MRI and radiography of the wrist were performed in 88 healthy children, 5-15 years of age. We assessed the number of bony depressions within the carpals/proximal metacarpals on both modalities, separately and combined.
A total of 75 carpal depressions were identified on radiography compared to 715 on MRI. The number of bony depressions identified radiographically showed no statistically significant difference across age-groups. Within the metacarpals, there was no significant difference between bony depressions identified by MRI or radiography, except at the bases of the second metacarpal.
Bony depressions that resemble erosions are normal findings in the wrist in children. MRI identifies more depressions than radiographs in the carpus. Some bony depressions occur at typical locations and should be accounted for when assessing the wrist in JIA to avoid overstaging.
在幼年特发性关节炎（JIA）中，侵蚀的存在用于诊断和监测疾病活动。由于缺乏正常参考，评估儿童腕骨侵蚀具有挑战性。
定义腕骨 X 线片和 MRI 上骨凹陷的正常表现。
对 88 名 5-15 岁的健康儿童进行腕关节 MRI 和 X 线摄影检查。我们分别和联合评估两种方式下腕骨/近节指骨内骨凹陷的数量。
X 线片上共发现 75 个腕骨凹陷，MRI 上发现 715 个。X 线片上骨凹陷的数量在不同年龄组之间无统计学差异。在掌骨中，MRI 或 X 线摄影识别的骨凹陷之间没有显著差异，除了第二掌骨基部。
在儿童腕关节中，类似于侵蚀的骨凹陷是正常表现。MRI 在腕骨中比 X 线摄影识别出更多的凹陷。一些骨凹陷发生在典型位置，在评估 JIA 腕关节时应考虑到这些位置，以避免过度分期。
