Morphometric Study Of Pyramidal Lobe And Levator Glandulae Thyroidae And Its Surgical Significance

ABSTRACT

Introduction: The thyroid gland is an important endocrine gland in human body , thyroid disorder being thecommon health problem affecting almost 5% of the population. Incomplete removal of thyroid gland may causerecurrence of disease and it could be dangerous when complete removal of gland tissue is indicated in Grave’sdisease or malignant carcinoma . Remains of pyramidal lobe ,the cause. Hence its necessary to know the trueincidence of anatomic variants of thyroid viz , pyramidal lobe or levator glandulae thyroidae to perform safeand effective surgery.Aims: To study the morphological variations of lobes of thyroid gland . viz. pyramidal lobe, levator glandulaethyroidae and its incidence in western maharashtra population.Materials and methods: The study was conducted on total of 60 thyroid glands(male-34, female-26) collectedduring routine dissection from adult cadavers of both sexes aged more than 18 yrs in the department of anatomy,B. J. government medical college , Pune. A cross sectional descriptive type of study was performed.Results: Pyramidal lobe was found in 25% cases , more common in females (30.76%), than males (20.58%) .Levator glandulae thyroidae was seen in (38.33%) cases, more common in females (38.46%) than males (38.23%). Pyramidal lobe was mostly originated from center of isthmus (46.6%) and least from right end of isthmus(6.66%) . In pyramidal lobe, length and breadth were more in males whereas thickness was more in females.Maximum 73.9% LGT seen were muscular in texture followed by fibromuscular , fibrous respectively. Maximumnumber of LGT seen were extending from pyramidal lobe to hyoid bone (43.47%), followed by either lobe ofthyroid gland to hyoid bone . All dimentions of LGT were more in males. PL associated with LGT was seen in23.33% cases , males 20.59% and females 26.92% , thus showing female preponderance.Conclusion: The study highlights the incidence of pyramidal lobe and levator glandulae thyroidae which isimportant to keep in mind for successful thyroid surgeries to prevent recurrence of diseases .