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首页> 外文期刊>AJR: American Journal of Roentgenology : Including Diagnostic Radiology, Radiation Oncology, Nuclear Medicine, Ultrasonography and Related Basic Sciences >Clinical significance of intramuscular cysts in the rotator cuff and their relationship to full- and partial-thickness rotator cuff tears.
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Clinical significance of intramuscular cysts in the rotator cuff and their relationship to full- and partial-thickness rotator cuff tears.

机译：肩袖肌内囊肿的临床意义及其与全层和部分厚度肩袖撕裂的关系。

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OBJECTIVE: Secondary signs have been sought to help in the MR diagnosis of rotator cuff tears, especially partial-thickness tears. We sought to determine whether intramuscular cysts are always present with rotator cuff tears and the types of rotator cuff tears with which they present, and to establish the clinical significance of finding intramuscular cysts. MATERIALS AND METHODS: Retrospective analysis of our institution's database of 5,101 MRI examinations of the shoulder during an 8-year period resulted in 187 examinations in 185 patients who were thought to have intramuscular cysts. Of the 187 examinations, 134 shoulders in 132 patients (62 women, 70 men) met our criteria for an intramuscular cyst. RESULTS: Of the 134 shoulders with intramuscular cysts, 102 (76.1%) showed imaging findings of both intramuscular cysts and rotator cuff tears. Thirty-two of the 134 (23.9%) shoulders were diagnosed with only an intramuscular cyst and were not associated with a rotator cuff tear. Fifty-five of 102 (53.9%) shoulders consisted of an intramuscular cyst associated with a full-thickness rotator cuff tear, and 47 of 102 (46.1%) shoulders presented with a partial-thickness rotator cuff tear. Forty-eight of 102 (47.1%) shoulders with both an intramuscular cyst and a rotator cuff tear also underwent the reference standard arthroscopy examination to confirm the MRI findings. In 46 of 48 (95.8%) shoulders that underwent arthroscopy, the findings confirmed the imaging evidence; the other two cases were shown to have an intact rotator cuff at arthroscopy. CONCLUSION: Our study echoes the findings of previous studies that suggest a relationship between intramuscular cysts and full- and partial-thickness rotator cuff tears but illustrates that the incidence of an isolated intramuscular cyst is higher than previously expected. When intramuscular cysts present with rotator cuff tears, they present with full- and partial-thickness rotator cuff tears in relatively equal proportions. The presence of an intramuscular cyst on MRI, although it may be an isolated finding, should prompt a thorough search of all the rotator cuff tendons for tears so that the patient may receive appropriate follow-up.
机译：目的：寻求辅助体征以帮助MR诊断肩袖撕裂，尤其是部分厚度的撕裂。我们试图确定肌内囊肿是否总是伴有肩袖撕裂以及它们所伴随的肩袖撕裂的类型，并建立发现肌内囊肿的临床意义。材料与方法：回顾性分析了我们机构在8年中对5101例肩部MRI检查的数据库，结果对185例认为患有肌内囊肿的患者进行了187例检查。在187项检查中，有132例患者中的134根肩膀（62名女性，70名男性）符合我们的肌内囊肿标准。结果：在134个肩部肌肉内囊肿中，有102个（76.1％）显示了肌内囊肿和肩袖撕裂的影像学表现。 134个肩膀中有32个（23.9％）被诊断出仅具有肌内囊肿，与肩袖撕裂无关。 102个肩膀中有55个（53.9％）由与全厚度肩袖撕裂相关的肌内囊肿组成，而102个肩膀中有47个（46.1％）表现为部分厚度肩袖撕裂。还对102例同时患有肌内囊肿和肩袖撕裂的102例肩膀（47.1％）进行了参考标准关节镜检查，以证实MRI表现。在接受关节镜检查的48个肩中，有46个（95.8％）证实了影像学证据。另外两个病例在关节镜检查时显示完整的肩袖。结论：我们的研究与以前的研究结果相呼应，这些研究表明肌内囊肿与全层和部分厚度的肩袖撕裂之间的关系，但说明孤立的肌内囊肿的发生率高于先前的预期。当肌内囊肿出现肩袖撕裂时，它们会以相对相等的比例出现全厚度和部分厚度的肩袖撕裂。 MRI上肌内囊肿的出现虽然可能是一个孤立的发现，但应促使彻底检查所有肩袖肌腱是否有眼泪，以便患者可以接受适当的随访。

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