Thyroid fibrous band and levator glandulae thyroideae muscle: Two different structures associated with the pyramidal lobe of the thyroid gland

We investigated two structures that are in close association with the pyramidal lobe of thyroid gland. Our investigation was performed using microdissection and histological examination 106 human postmortem specimens. The first structure identified as fibrous band present 28.3% cases. This always associated (which significantly longer thicker when this band) it had a constant hyo-pyramidal extension; located to midsagittal plane predominantly composed dense irregular connective tissue. second levator glandulae thyroideae muscle, which only 13.6% muscle double extension, laryngo-pyramidal, farther from plane, thinner than striated fibers. confirmed our hypothesis band, may be considered partial remnant thyroglossal duct thyroideae, infrahyoid or laryngeal different