Various locations of the base of pyramidal lobe generally require careful dissection of both the pretracheal and the prelaryngeal
regions from the upper border of the isthmus up to the upper border of the thyroid cartilage in most of the patients and sometimes up to the hyoid bone.
It is often seen in lingual, sublingual and prelaryngeal locations.
 The other sites are sublingual, prelaryngeal, intratracheal, oesophagus, mediastinum, gall bladder, porta hepatis, salivary glands etc.
She was diagnosed as having stage IIE MCL as she only had disease in the thyroid and prelaryngeal lymph node and the bone marrow biopsy was negative.
Caption: Figure 2: Mantle cell lymphoma involving the thyroid and prelaryngeal lymph node (insert), stained with Hematoxylin and Eosin (100x).
muscles and the thyroid isthmus were sectioned to provide a thorough exploration from the cricoid cartilage to the 7th tracheal ring.
CLND includes prelaryngeal
, paralaryngeal, pretracheal, paratracheal, periglandular, and paraglandular lymph nodes between the hyoid bone and level 7.
Kun, "Right thyroid hemiagenesis associated with papillary thyroid cancer and an ectopic prelaryngeal
thyroid: a case report," Journal of the Formosan Medical Association, vol.
The level VI (prelaryngeal
) node was removed when LCSE was detected before or during surgery, which occurred in 8 patients.
Type 3 (prelaryngeal) and Type 4 (prearterial) have seldom observed as location of terminal division of the ILN (Table 3).
3 Prelaryngeal Division occurs in the second (distal) half of the distance between neurovascular crossing and laryngeal entry point of the ILN.
[1,2] 90% of these are lingual thyroid and others may be sublingual (Suprahyoid, infrahyoid at the level of hyoid bone), prelaryngeal
, mediastinal; though other unusual sites have also been accounted for: trachea, submandibular, lateral cervical regions, axilla, palatine tonsils, carotid bifurcation, iris of eye, pituitary gland, heart, thymus, oesophagus, duodenum, gallbladder, stomach.