Tucci G, Rulli F
Dipartimento di Chirurgia, Università degli Studi Tor Vergata, Roma.
G Chir. 1999 Mar;20(3):97-9.
Ectopic thyroid rest can be seen anywhere along the path of descent of the gland. The most ectopic thyroid tissue is a thyroglossal duct cyst associated with normal thyroid gland. Sublingual location is less common than a lingual ectopia. True malignant transformation in ectopic thyroid tissue is extremely rare. Such a malignancy is virtually always diagnosed only after surgical excision of the lesion at pathological examination. This report discusses a case of ectopic thyroid follicular carcinoma in the right submandibular region in the absence of orthotopic thyroid, discovered by chance after the surgical excision performed for a preoperative ultrasonically and cytologically misdiagnosed submandibular gland adenocystic carcinoma. The possible aetiology of such an unusual anatomical relationship is discussed as well as the importance of thyroid scanning, ultrasound and/or CT in neck lumps.
异位甲状腺残余可出现在甲状腺下降路径的任何部位。最常见的异位甲状腺组织是与正常甲状腺相关的甲状舌管囊肿。舌下位置比舌部异位少见。异位甲状腺组织真正发生恶性转化极为罕见。这种恶性肿瘤实际上几乎总是在手术切除病变后经病理检查才得以诊断。本报告讨论了一例右下颌下区异位甲状腺滤泡癌病例，该病例术前超声和细胞学误诊为下颌下腺腺囊性癌，手术切除后偶然发现无原位甲状腺。文中还讨论了这种不寻常解剖关系可能的病因以及甲状腺扫描、超声和/或CT在颈部肿块中的重要性。
