Morphological study of levator glandulae thyroidea in Bangladeshi cadaver.

The study was done to see the incidence of levator glandulae thyroidea including its association with pyramidal lobe and its morphological variation regarding its craniocaudal attachment in Bangladeshi people. Sixty postmortem tissue blocks containing thyroid gland and its neighbouring structures were collected from 48 male and 12 female cadavers of different age groups and fixed in 10% formol-saline solution. Gross and fine dissection was carried out to study the incidence of levator glandulae thyroidea, its attachment and its association with pyramidal lobe. In the present study, observed findings were compared with those of Western and Bangladeshi researchers. It was evident that, in the present study, in 43.33% cases levator glandulae thyroidea was present. Among them 84.65% was associated with the pyramidal lobe and in all of these cases it extended from the apex of the pyramidal lobe to hyoid bone. In most of the cases (92%) of this study the levator glandulae thyroideae were cranially found to attach with hyoid bone. Only four muscles those were not associated with pyramidal lobe arise from isthmus. Two of them cranially attached with hyoid bone and remaining two levator glandulae thyroideae cranially was found to be attached with the corresponding oblique line of thyroid cartilage.