Sultana S Z, Khalil M, Khan M K, Rahman M M, Mannan S, Wahed F, Choudhury S
Mymensingh Medical College, Mymensingh, Bangladesh.
Mymensingh Med J. 2011 Jul;20(3):366-70.
This cross sectional descriptive study was carried out to determine the length, breadth & thickness of isthmus of thyroid gland of Bangladeshi people. To fulfill this aim sixty postmortem tissue blocks containing thyroid gland and its neighbouring structures were collected by convenience sampling technique from 48 male and 12 female cadavers of different age groups, age ranging from 11 to 70 years and fixed and preserved in 10% formol-saline solution. Specimens were collected from dead bodies autopsied on different dates from October'2004 to February'2005 at the autopsy laboratory of Forensic Medicine Department of Mymensingh Medical College, Mymensingh, Bangladesh. Gross and fine dissection was carried out to study the length, breadth and thickness of isthmus of thyroid gland. In the present study, observed findings were compared with those of Western and Bangladeshi researchers. It was seen that the mean±SD lengths of isthmus were 10.42±7.49 mm, 10.17±5.70 mm and 9.33±6.64) mm in Group A(upto 18 years), B(19 to 45 years) and C(>45 years) respectively. Highest length (30mm) was observed in Group A and lowest length (2mm) was observed in Group C. Variance analysis showed that there was no significant difference in mean length between the age groups (F=0.086, p=0.918). The mean±SD values of breadth were 13.66±5.06 mm, 14±5.41 mm and 12.27±3.97 mm in Group A, B and C respectively. In the ranges, there was much overlapping among the groups. In Group B breadth of the isthmus was greater than other age groups. But these differences were statistically not significant, where F=0.430 & p=0.654. It was interesting to note that in this study the mean breadth of isthmus was significantly greater than the mean length (where, t=-2.727 and p=0.01). In the present study the mean±SD thickness of the isthmus of thyroid glands were 4.91±1.78 mm, 4.72±2.68 mm and 4.45±1.36 mm in three age groups respectively & the thickness of isthmus of thyroid gland was also greater in Group B than other two groups. But the variance analysis reveals that, there was insignificant difference in the thickness (F=0.133, p=0.876) of isthmus of thyroid gland among different age groups.
本横断面描述性研究旨在确定孟加拉国人甲状腺峡部的长度、宽度和厚度。为实现这一目标，采用便利抽样技术，从48例男性和12例女性不同年龄组（年龄范围为11至70岁）的尸体中收集了60个包含甲状腺及其邻近结构的尸检组织块，并固定保存在10%甲醛盐溶液中。标本于2004年10月至2005年2月期间在孟加拉国迈门辛医学院法医学系尸检实验室不同日期进行尸检的尸体上采集。进行大体和精细解剖以研究甲状腺峡部的长度、宽度和厚度。在本研究中，将观察结果与西方和孟加拉国研究人员的结果进行了比较。结果发现，A组（18岁及以下）、B组（19至45岁）和C组（45岁以上）甲状腺峡部的平均±标准差长度分别为10.42±7.49mm、10.17±5.70mm和9.33±6.64mm。A组观察到最长长度（30mm），C组观察到最短长度（2mm）。方差分析显示，各年龄组之间的平均长度无显著差异（F = 0.086，p = 0.918）。A组、B组和C组甲状腺峡部宽度的平均±标准差分别为13.66±5.06mm、14±5.41mm和12.27±3.97mm。在这些范围内，各组之间有很多重叠。B组甲状腺峡部宽度大于其他年龄组。但这些差异在统计学上不显著，F = 0.430，p = 0.654。有趣的是，在本研究中，甲状腺峡部的平均宽度显著大于平均长度（t = -2.727，p = 0.01）。在本研究中三个年龄组甲状腺峡部的平均±标准差厚度分别为4.91±1.78mm、4.72±2.68mm和4.45±1.36mm，B组甲状腺峡部厚度也大于其他两组。但方差分析显示，不同年龄组甲状腺峡部厚度无显著差异（F = 0.133，p = 0.876）。
