Rajbhandari P, Shrestha B L, Dhakal A, Amatya R Cm
Department of Otorhinolaryngology and Head and Neck Surgery, Dhulikhel Hospital, Kathmandu University Hospital, Dhulikhek, Kavre.
Kathmandu Univ Med J (KUMJ). 2016;14(56):373-375.
Thyroid gland is the largest of all endocrine glands. It is composed of two lobes. These two lobes are joined by an isthmus and this resemble the letter "H". A wide range of morphological variations and developmental anomalies of the thyroid gland like hypoplasia, ectopy, hemiagenesis, and agenesis have been reported in literature. Out of these, the incidence of agenesis of the thyroid isthmus is rare, and very few cases have been reported. In our report, 28 year old male patient was found with agenesis of thyroid isthmus with papillary carcinoma in the right lobe of thyroid. During the operation it was seen that the right and left thyroid lobes were independent from each other and isthmus was absent. We will present a case of thyroid isthmus agenesis and discuss the clinical importance and the incidence of this case.
甲状腺是所有内分泌腺中最大的。它由两个叶组成。这两个叶由一个峡部相连，形似字母“H”。文献中报道了甲状腺广泛的形态学变异和发育异常，如发育不全、异位、半侧发育不全和发育不全。其中，甲状腺峡部发育不全的发生率罕见，仅有少数病例报道。在我们的报告中，一名28岁男性患者被发现甲状腺峡部发育不全，右侧叶有乳头状癌。手术中发现左右甲状腺叶相互独立，峡部缺失。我们将呈现一例甲状腺峡部发育不全的病例，并讨论该病例的临床重要性和发生率。
