Tanaka T, Morimoto Y, Kito S, Ro T, Masumi T, Ichiya Y, Ohba T
Department of Dental Radiology, Kyushu Dental College, Kitakyushu, Japan.
Dentomaxillofac Radiol. 2003 Sep;32(5):300-3. doi: 10.1259/dmfr/12630722.
To report rare cases of isolated medial orbital wall blow-out fractures and to evaluate their coronal CT findings.
Nine cases of medial orbital wall blow-out fractures, diagnosed by coronal CT in a general medical hospital between 1995 and 1999, were studied. CT was performed using direct coronal acquisition with a slice thickness of 5 mm. Images were obtained at bone window settings. Clinical examination findings from the medical records were used to give information on the cause of injury, ocular symptoms and the days after injury that the CT examination was performed.
Most of the patients (67%) were young male adults. The cause of injury was most frequently the result of fist fighting or athletics (78%). Diplopia and/or limitation of the gaze were the main ocular symptoms (78%). The average time from injury to CT examination was 4 days (range 0-16 days). Seven of the nine patients with medial orbital wall fractures had isolated medial orbital wall blow-out fractures. Herniation of orbital contents toward the ethmoid sinus was observed among all nine fractures. Only three patients (33%) had a swelling and/or medial deviation of the medial rectus muscle, all three having isolated medial orbital wall blow-out fractures.
Nine cases of medial orbital wall blow-out fractures were examined, seven of which were isolated medial wall blow-out fractures. CT findings of this type of fracture included herniation of the orbital contents toward the ethmoid sinus. However, swelling and/or medial deviation of the medial rectus muscle was also seen.
报告罕见的单纯眶内侧壁爆裂骨折病例，并评估其冠状位CT表现。
研究了1995年至1999年间在一家综合医院通过冠状位CT诊断的9例眶内侧壁爆裂骨折病例。CT采用直接冠状位扫描，层厚5mm。在骨窗设置下获取图像。从病历中提取临床检查结果，以获取有关受伤原因、眼部症状以及进行CT检查的受伤后天数的信息。
大多数患者（67%）为年轻成年男性。受伤原因最常见的是斗殴或体育运动（78%）。复视和/或眼球运动受限是主要的眼部症状（78%）。从受伤到进行CT检查的平均时间为4天（范围0 - 16天）。9例眶内侧壁骨折患者中有7例为单纯眶内侧壁爆裂骨折。所有9例骨折均观察到眶内容物向筛窦疝出。只有3例患者（33%）出现内直肌肿胀和/或内移，这3例均为单纯眶内侧壁爆裂骨折。
对9例眶内侧壁爆裂骨折进行了检查，其中7例为单纯眶内侧壁爆裂骨折。此类骨折的CT表现包括眶内容物向筛窦疝出。然而，也可见到内直肌肿胀和/或内移。
