Intramasseteric Vascular Malformation

肌肉內血管畸形為良性而少見的血管性病變，大多發生於軀幹或四肢，只有10%的肌肉內血管畸形發生於頭頸部，而咀嚼肌為頭頸部位最常發生的位置，不過由於它臨床上非特異性的表現及不高的發生率，使得確切診斷常需影像學工具的輔助，尤其於影像上發現有靜脈石時，便可以縮小鑑別診斷的範圍而加強了血管病變之診斷。肌肉內血管畸形多為良性，故其存在並非需要手術之絕對適應症，大多數的手術介入治療是因外觀變形之需求，然而血管畸形本身的易出血特性及咀嚼肌附近的相關重要構造皆提高了本手術進行之難度，是否能控制出血狀況取得清楚的手術視野，將決定手術能否順利進行以完成足夠的血管畸形切除。我們提出三個成功切除咀嚼肌內血管畸形之案例，且整理了相關文獻，於診斷及處置原則方面皆有相關之討論。

關鍵字

無資料

並列摘要

Intramuscular vascular malformations are uncommon and benign lesions of vascular origin. The masseter muscle is the most common involved site in the head and neck region. Its uncommon incidence and the nonspecific clinical presentations usually make the diagnosis confused. Radiographic studies can usually help us to narrow the differential diagnosis. Especially when hypodense areas are noted associated with vascular lesions in image studies, formation of phlebolithes is favored. Then the differential diagnosis may be confined to vascular lesions. Though the existence of an intramuscular vascular malformation is not an absolute indication for the operation, surgical treatment may become necessary for patients mostly because of cosmetic deformity. However, some factors limit the surgical approaches such as possible bleeding, neural injury or postoperative dysfunction. So adequate exposure and clear operative field are important for optimal tumor resection and preservation of vital anatomic structures. The surgeons are interested in these rare and benign lesions because of the challenge they may offer in difficult location and easily bleeding characteristics. We reported 3 cases of intramasseteric vascular malformation and review the current literature.

並列關鍵字

intramuscular vascular malformation ； intramasseteric vascular malformation

國際替代計量

Intramasseteric Vascular Malformation

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