Deutsch A L, Mink J H, Fox J M, Arnoczky S P, Rothman B J, Stoller D W, Cannon W D
Department of Radiology, Cedars-Sinai Medical Center, Los Angeles, CA 90048.
Radiology. 1990 Aug;176(2):485-8. doi: 10.1148/radiology.176.2.2367665.
Follow-up knee magnetic resonance (MR) examinations were performed on 17 patients (18 menisci) with arthroscopically proved tears of the outer third of the meniscus who were treated either conservatively (six patients) or with surgical repair (11 patients). All patients satisfied accepted clinical orthopedic criteria for meniscal healing. MR examinations obtained 3-27 months after injury revealed persistent signal intensity (grade 3), unchanged from that seen on the preoperative study, in all 15 patients in whom both pre- and postoperative studies were obtained and in three of four menisci that were proved to be healed at second-look arthroscopy. It appears that grade 3 signal from both conservatively treated and repaired menisci may persist long after the tear has become asymptomatic and has presumably healed. The presence of such signal should not be interpreted as necessarily indicating meniscal retear in these patients. Persistent signal intensity at the site of previous injuries may account for some reported cases of disagreement between MR and arthroscopic findings.
对17例（18个半月板）经关节镜证实为半月板外侧三分之一撕裂的患者进行了随访膝关节磁共振（MR）检查，这些患者接受了保守治疗（6例）或手术修复（11例）。所有患者均符合公认的半月板愈合临床骨科标准。受伤后3 - 27个月进行的MR检查显示，在所有获得术前和术后检查结果的15例患者以及在二次关节镜检查中被证实已愈合的4个半月板中的3个中，信号强度持续存在（3级），与术前检查所见无变化。似乎无论是保守治疗还是修复的半月板，3级信号在撕裂无症状且推测已愈合后仍可能长期存在。在这些患者中，这种信号的存在不应必然解释为半月板再次撕裂。先前损伤部位持续的信号强度可能是一些报道的MR与关节镜检查结果不一致病例的原因。
