Topographic Evaluation of Superior Thyroid Artery-A Terrain to be Well Versed for Surgeon's Knife

Observing the origin, varied branching configurations of superior thyroid artery (STA) and evaluating morphometric details with its surrounding relations was aimed at in this cadaveric neck dissection study to avoid surgical mishaps and its repercussions. This observational study was conducted on 40 fresh frozen embalmed and colored latex infused cadavers in the Department of Otorhinolaryngology and Head and Neck Surgery in collaboration with Department of Anatomy of our institute, which involved systematic evaluative dissection of both sides of neck especially focusing on superior thyroid artery, its branching variations and morphometric details with its surrounding relations. Details were measured using digital caliper. The collected data was statistically analyzed by applying chi-square test and significance was set at 5% level (p < 0.05). The analysis revealed the location of the origin of the superior thyroid artery of cadavers from carotid bifurcation and above it in 40% and from above the level of superior border of thyroid cartilage in 40% of cases. The distribution patterns of the superior thyroid artery were classified into three types depending on the branching pattern typical and variant glandular branching patterns were observed in 85% and 15% of the specimens respectively. A sound knowledge of the regional anatomy and its possible variations helps the surgeon in isolating and preserving the vital structures and avoid iatrogenic complications.