診断治療に股関節鏡が有用であった滑膜骨軟骨腫症の2例

Usefulness of Arthroscopy in Two Patients with Synovial Osteochondromatosis. Report of Two Cases

　症例は46歳女性と61歳女性で，両症例とも片側の股関節痛を主訴に受診した．画像検査で滑膜骨軟骨腫症と診断し，当院で手術を施行した．1例目では股関節鏡視下で摘出困難であったため前側方侵入で摘出した．2例目では鏡視下で摘出しえた．股関節鏡は本疾患の診断，治療に有用であった．摘出困難な場合でも，腫瘍の大きさ，局在を鏡視下に同定することにより，小侵襲の進入法で摘出が可能であり，股関節鏡選択のメリットは大きいと考える．

　We report the case of a 46-year-old woman and the case of a 61-year-old woman who were examined in our hospital because of unilateral hip pain.　Based on the imaging examination findings both patients were diagnosed with synovial osteochondromatosis.　Both of them underwent arthroscopic surgery, and in the first patient we switched open surgery by the anterolateral approach in order to be able to remove all of the tumor tissue.　In the other case, we were able to remove all of the tumor tissue by arthroscopic surgery alone.　In both cases, hip arthroscopy was useful for diagnosis and in performing treatment.　If arthroscopic tumor removal is difficult, the size and the localization of the tumor can be identified arthroscopically, there by allowing selection of a minimally invasive approach.　Hip arthroscopy is very useful in the treatment of synovial osteochondromatosis.