organelles closely related to the endocrine function of the thyroid epithelium such as apical or subapical vesicles , lysosomal granules , colloid droplets , golgi apparatus , rer , and microvilli on the apical surface , were found to decrease in parallel with structural and cellular atypism of the thyroid lesion under examination , suggesting impairment of their function in the malignant lesions .
C0026049
microvilli
C0007634
cellular