Wei Yi, Xiao Jia-He, Zhu Pei-Ju, Liu Chang
Department of Radiology, West China Hospital, Sichuan University, Chengdu 610041, China.
Sichuan Da Xue Xue Bao Yi Xue Ban. 2005 Nov;36(6):870-2.
This is a study on the CT and MRI features of diseases involving the masticator spaces; the purpose is to improve the diagnostic accuracy.
Fifty-seven cases involving the masticator spaces were collected, among which, 11 cases were originated from the masticator space, another 46 cases were secondary invasion from the adjacent structures, including 18 cases from the buccal mucosa, 10 from the nasopharynx, 5 from the gingiva, 3 from the parotid gland, 6 from the maxillary sinus, 1 from the intracranial location, 2 from the palate and 1 from the orbit. The CT and MRI features of the masticator space involvement were analysed.
Masticator space involvement is visualized on CT and MRI as effacement of the fat plane, swelling of the masticatory muscles, and erosion of the mandibular ramus. Disease from surrounding structures can invade the masticator space via the pterygopalatine fossa, the buccal space immediately anterior to the ramus, the foramen ovale, or by way of direct invasion.
Masticator space involvement is not uncommon in the maxillofacial diseases, which must be noticed in the imaging diagnosis.
本研究旨在探讨咀嚼肌间隙疾病的CT及MRI表现，以提高诊断准确性。
收集57例咀嚼肌间隙疾病患者，其中起源于咀嚼肌间隙的11例，其余46例为相邻结构病变侵犯所致，包括颊黏膜18例、鼻咽部10例、牙龈5例、腮腺3例、上颌窦6例、颅内1例、腭部2例、眼眶1例。分析咀嚼肌间隙受累的CT及MRI表现。
咀嚼肌间隙受累在CT及MRI上表现为脂肪间隙消失、咀嚼肌肿胀及下颌骨升支骨质侵蚀。周围结构病变可经翼腭窝、下颌支前方颊间隙、卵圆孔或直接侵犯等途径累及咀嚼肌间隙。
咀嚼肌间隙受累在颌面疾病中并不少见，影像诊断时应予以重视。
