MORPHOLOGICAL AND MORPHOMETRIC STUDY OF FOETAL THYROID GLAND AT DIFFERENT GESTATIONAL AGE.
Journal Title: PARIPEX-Indian Journal of Research - Year 2017, Vol 6, Issue 7
Abstract
Introduction: The thyroid gland is the largest endocrine gland and is one of the earliest to start differentiating and functioning. Different variations like persistence of pyramidal lobe, thyroglossal cyst, agenesis of isthmus and aberrant thyroid tissue are common findings and need to be taken care of especially in emergency thyroid related surgeries. Material & Methods: 50 intact foetuses of different gestational ages ranging from 10-36 weeks were studied in the Department of Anatomy, Government Medical College and Hospital -32 Chandigarh. After preserving in 10% formalin, midline incision was given and the thyroid gland was exposed. Accordingly different morphological and morphometric measurements were taken and evaluated. Results: The thyroid glands were found to be related with 1st 6th tracheal rings in all the foetuses. They were butterfly shape in most of the cases except in three foetuses where there was absent isthmus. The foetuses were divided into 3 groups based on their gestational age as 10-18 weeks, 19- 27 weeks and 28-36 weeks. The mean dimensions of length, breadth and width of both right and left lobes were noted accordingly. In 14 % cases, pyramidal lobe along with levator glandulae thyroidea (LGT) was noted whereas in 12% cases there was agenesis of isthmus. Conclusion: The variations of thyroid gland and its morphometric measurements are important in foetuses specially with increasing gestational age. The incidence of certain developmental anomalies like agenesis of isthmus, persistent pyramidal lobes and presence of LGT are important from both surgical and radiological point of view.
Authors and Affiliations
Dr. Arun Sharma, Dr. Mahesh Kumar Sharma, Mr. Rupinder Singh.
Keywords
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