Cervical Thymopharyngeal Duct Cyst Mimicking a Thyroid Nodule in an Adult: A Rare Case Report.

Jihène Houas, Mouna Belakhdher, Ghada Grassi, Taghrid Tlili, Monia Ghammam
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Abstract

Thymopharyngeal duct cysts are rare congenital lesions resulting from the persistence of the embryonic thymopharyngeal tract, typically presenting in pediatric populations. Adult cases are exceedingly uncommon and often misdiagnosed due to their rarity and nonspecific clinical features. We report the case of a 34-year-old woman who presented with a slowly-enlarging, painless left cervical mass initially suggestive of a thyroid pathology. Imaging revealed a well-defined cystic lesion at the lower pole of the thyroid gland. Surgical excision via a low cervicotomy was performed, and a left lobo-isthmectomy was carried out due to the lesion's adherence to the thyroid. Final histopathological analysis confirmed a thymopharyngeal duct cyst. This case underscores the diagnostic challenges of lateral neck cysts in adults and highlights the importance of considering rare embryologic anomalies in the differential diagnosis, particularly when lesions mimic more common thyroid or branchial cleft pathologies.

成人颈部胸腺咽管囊肿模仿甲状腺结节:罕见病例报告。
摘要胸腺咽管囊肿是一种罕见的先天性病变,是由于胚胎胸腺咽道的持续存在而引起的,通常出现在儿科人群中。成人病例非常罕见,由于其罕见性和非特异性临床特征,经常被误诊。我们报告的情况下,34岁的妇女谁提出了一个缓慢扩大,无痛的肿块左宫颈最初提示甲状腺病理。影像学显示甲状腺下极有一界限清楚的囊性病变。手术切除通过低颈切开术,并进行了左叶-峡切除术,由于病变粘附甲状腺。最后的组织病理学分析证实为胸腺咽管囊肿。本病例强调了成人侧颈囊肿的诊断挑战,并强调了在鉴别诊断中考虑罕见胚胎学异常的重要性,特别是当病变与更常见的甲状腺或鳃裂病理相似时。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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