Department of Radiology, Barnsley Hospital NHS Foundation Trust, Barnsley, S75 2EP, UK,
Jpn J Radiol. 2014 Feb;32(2):105-8. doi: 10.1007/s11604-013-0269-6. Epub 2013 Dec 11.
We report a unique case of sesamoiditis in an extremely rare accessory genicular ossicle. Common to lower primates, the cyamella or popliteus tendon sesamoid bone is usually absent in humans. A 19-year-old male sustained a twisting injury to the right knee and presented with mechanical symptoms of knee pseudo-locking. A plain radiograph of the knee illustrated the presence of a cyamella. Magnetic resonance imaging demonstrated marked bone marrow oedema of this sesamoid structure and in the adjacent popliteus tendon. To our knowledge, documented sesamoiditis of this osseous structure on radiological imaging has not been published in English literature and this case highlights the imaging features of this uncommon entity.
我们报告了一例极为罕见的副关节骨籽骨炎病例。下等灵长类动物通常存在的豆状骨或腘肌腱籽骨在人类中通常不存在。一名 19 岁男性的右膝遭受扭转伤，出现膝关节假性锁定的机械症状。膝关节的平片显示存在豆状骨。磁共振成像显示该籽骨结构和相邻的腘肌腱有明显的骨髓水肿。据我们所知，该骨骼结构的籽骨炎在影像学上的已有文献记录尚未在英文文献中发表，本病例突出了这种罕见实体的影像学特征。
