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Morphology and Histogenesis of Human Fetal and adult Thyroid Gland

Journal of Research in Medical and Dental Science
eISSN No. 2347-2367 pISSN No. 2347-2545

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Research - (2021) Volume 9, Issue 9

Morphology and Histogenesis of Human Fetal and adult Thyroid Gland

P Vahini*

*Correspondence: P Vahini, Department of Anatomy, Sree Balaji Medical College & Hospital Affiliated to Bharath Institute of Higher Education and Research, India, Email:

Author info »

Abstract

In human beings thyroid gland is one of the most important endocrine gland. It is differentiated at early embryonic life and has important role in human development. Thyroid gland regulates metabolic rate, psychological development and somatic development. The ability of the human fetal thyroid gland to concentrate iodide and to synthesize thyroid hormones thus seems to be linked to the organization of follicles. Anomalies of thyroid gland like agenesis of are thymus can be diagnosed via CT, MRI and the results provides the ultrasound importance for the radiologists to prevent both maternal and fetal complications to avoid further invasive procedures.

Keywords

Anomalies, Isthumus, Follicles

Introduction

Thyroid hormones are necessary for regulating the body metabolic rate, body temperature, calcium metabolism, somatic and circadian rhythm. The organogenesis of thyroid gland in human is often disturbed, leading to a variety of morphological variations such as hypoplasia, ectopy, agenesis etc. These anomalies may lead to various thyroid illnesses and clinical disorders [1-4]. Congenital hypothyroidism is the most common disorder of the endocrine system among new-borns. We intend to study the morphological changes of the thyroid gland at different gestational weeks in human foetuses and in adult and also to document the microscopic structure of thyroid gland at different gestational age groups and also in adult.

Materials and Methods

Thirty three human foetuses (16 males and 17 females) of different age groups ranging from 10 to 39th gestational week. Morphological parameters such as length, width and size were ascertained and also the histopathological studies were done on the collected samples.

Results

The morphological studies revealed that level of superior poles of thyroid lobe were located between the upper ½ and lower ½ of the thyroid cartilage in group 1 samples. Thyroid gland was found to be normal in position and dimensions in group 2 cases. In the group 3 category the distance between superior poles of thyroid gland and the hyoid bone increases throughout the fetal period as depicted in Figure 1.

medical-dental-science-thyroid-gland

Figure 1: Comparisons of dimensions of the lobes of thyroid gland and isthmus.

The histopathological results explains that human fetal thyroid (12wks) showing pheriperal differentiation of the follicles with increase vascularity in group 1 (a) and in group 2 samples it was seen that thick connective septa along with blood vessels invading the glands in 20weeeks also increase in size of the follicles (Group 2A & 2B).

Matured thyroid follicle filled colloid and increased vascularity seen in 30 weeks also with densely stained colloid was seen in group 3 cases.

medical-dental-science-Histological-observations

Figure 2: Histological observations.

Discussion and Conclusion

The study of morphology and Histogenesis of human fetal thyroid gland gives us insight into the growth and differentiation of the gland and for better understanding of the developmental anomaly. Anomalies of thyroid gland like agenesis of isthumus can be diagnosed via CT, MRI and ultrasound [3-10]. Proper identification of vessels is very important in order to avoid major complications. Hence a thorough knowledge of the thyroid anatomy and its associated anatomical variations is very much essential, so these anomalies are not overlooked in the different diagnosis. This analysis could be of great importance for the radiologists to prevent both maternal and fetal complications to avoid further invasive procedures.

References

Author Info

P Vahini*

Department of Anatomy, Sree Balaji Medical College & Hospital Affiliated to Bharath Institute of Higher Education and Research, Chennai, Tamil Nadu, India
 

Citation: P Vahini, Morphology and Histogenesis of Human Fetal and adult Thyroid Gland, J Res Med Dent Sci, 2021, 9(9): 127-128

Received Date: Jul 16, 2021 / Accepted Date: Sep 09, 2021 /

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