長距離走者にみられた仙骨疲労骨折の3例

Stress Fracture of the Sacrum in Long-Distance Runners : Report of Three Cases

　抄録：長距離走者に発生した仙骨疲労骨折3例を報告する．全例実業団の選手で，20歳男性と21歳女性は2カ月の運動制限でランニングを再開させた．他の21歳女性は無月経と骨塩量の低下がみられ，ランニング再開まで5カ月を要した．仙腸関節部痛を訴えた長距離走者の全例に仙骨疲労骨折を見出すことができたことから，長距離走者の仙腸関節部痛はまず仙骨疲労骨折を疑う必要がある．その診断にはMRIが有用であった．

　Three cases of sacral stress fracture in semi-professional long-distance runners are reported. A 20-year-old male and 21 year-old female started running again after restriction of training for two months, and a 21-year-old female with amenorrhea and low bone density started running 5 months after her initial visit. There were no long-distance runners but the three cases who were treated for sacroiliac pain. A stress fracture of the sacrum should be suspected in long-distance runners who complain of low back pain, especially sacroiliac pain. MRI is very useful in making the diagnosis of this rare injury.