Kimura Masashi, Nagao Toru, Saito Terumi, Warnakulasuriya Saman, Ohto Hiroyuki, Takahashi Akihito, Komaki Kanji, Naganawa Yoshiyuki
Department of Dentistry Oral and Maxillofacial Surgery, Ogaki Municipal Hospital, 4-86 Minaminokawa, Ogaki, Gifu 503-8502, Japan.
Department of Oral and Maxillofacial Surgery and Stomatology, Okazaki City Hospital, 3-1 Goshoai, Koryuji-cho, Okazaki, Aichi 444-8553, Japan.
Case Rep Dent. 2015;2015:518917. doi: 10.1155/2015/518917. Epub 2015 Jan 14.
An ectopic tonsil is defined as tonsillar tissue that develops in areas outside of the four major tonsil groups: the palatine, lingual, pharyngeal, and tubal tonsils. The occurrence of tonsillar tissue in the oral cavity in ectopic locations, its prevalence, and its developmental mechanisms that belong to its formation remain unclear. In this report, we describe a rare case of bilateral symmetric ectopic oral tonsillar tissue located at the ventral surface of the tongue along with two solitary cases arising from the floor of the mouth. The role of immune system and its aberrant response leading to ectopic deposits desires further studies. As an ectopic tonsil may simulate a benign soft tissue tumor, this case series highlights the importance of this entity in our clinical differential diagnosis of oral soft tissue masses.
异位扁桃体被定义为在四个主要扁桃体组（腭扁桃体、舌扁桃体、咽扁桃体和咽鼓管扁桃体）以外的区域发育的扁桃体组织。口腔内异位位置的扁桃体组织的发生情况、其患病率以及其形成的发育机制仍不清楚。在本报告中，我们描述了一例罕见的双侧对称异位口腔扁桃体组织位于舌腹面的病例，以及另外两例起源于口腔底部的孤立病例。免疫系统的作用及其导致异位沉积的异常反应尚需进一步研究。由于异位扁桃体可能模拟良性软组织肿瘤，本病例系列突出了该实体在我们口腔软组织肿块临床鉴别诊断中的重要性。
