Singh Anshul, Yadav Kusum, Kumar Manoj, Misra Vatsala
Department of Pathology, Moti Lal Nehru Medical College, Prayagraj, Uttar Pradesh, India.
Indian J Pathol Microbiol. 2021 Oct-Dec;64(4):780-782. doi: 10.4103/IJPM.IJPM_785_20.
Benign ectopic thyroid tissue within the parotid gland is very rare with only one case reported till date in the world literature. We report a case of ectopic thyroid in the left parotid gland with an orthotopic thyroid in an elderly female, who was presented to us with the simultaneous onset of right-sided thyroid swelling and left parotid swelling for 6 months. Fine-needle aspiration cytology (FNAC) was done from both the swellings and a diagnosis of Hurthle cell neoplasm metastasizing to the left parotid gland was initially made. However, histopathological examination along with the immunohistochemistry (IHC) panel proved it to be an ectopic thyroid in the parotid. The case is being documented here for its rarity as well as an unusual presentation so that the readers are aware of this entity and the complete workup required to prevent diagnostic pitfalls.
腮腺内的良性异位甲状腺组织非常罕见，迄今为止世界文献中仅报道过一例。我们报告一例老年女性左侧腮腺异位甲状腺伴正常位置甲状腺的病例，该患者因右侧甲状腺肿大和左侧腮腺肿大同时出现6个月前来就诊。对两个肿大部位均进行了细针穿刺细胞学检查（FNAC），最初诊断为许特耳细胞肿瘤转移至左侧腮腺。然而，组织病理学检查及免疫组织化学（IHC）检测证实其为腮腺内的异位甲状腺。本文记录该病例是因其罕见性及不寻常的表现，以便读者了解这一实体以及为避免诊断失误所需的完整检查流程。
