半月板切除後にとう痛を伴いＭＲＩで早期に骨髄信号異常を呈した一例

概要

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We report a case of bone marrow signal change in the medial tibial condyle (MTC) on MRI shortly after arthroscopic medial meniscectomy. A 52-year-old man visited our hospital complaining of pain on the medial side of the left knee for a one-month duration without specific trauma. Anteroposterior radiograph showed no bony lesion. MRI, however, suggested a medial meniscal tear. There was no abnormal change in the bone marrow of the MTC. The diagnosis was medial meniscus injury and we performed arthroscopic medial meiscectomy. At the time of surgery, there was no apparent chondral damage at the MTC. He was temporally relieved of his pain, however three weeks later he experienced postoperative pain at a more acute level than initially. MRI suggested bone marrow edema in the medial tibial condyle. After retuning to the hospital, the patient was issued a cast for three weeks and seven weeks later he was relieved of his pain and symptoms. We can conclude this case to be subchondral microfracture caused by weight bearing after meniscectomy based on the results of MRI and findings during clinical course.
西日本整形・災害外科学会の論文