AGENESIS OF ISTHMUS OF THYROID GLAND

The thyroid gland is an important endocrine gland in the human body, which is bilobed and is connected by a tissue called isthmus. The agenesis of thyroid isthmus is a clinical condition but this condition does not cause any clinical manifestations itself. The lack of isthmus is usually detected when investigations are done for other pathological conditions like autonomous thyroid nodule, thyroiditis, primary carcinoma, neoplastic metastasis and infiltrative diseases such as amyloidosis or during cadaveric dissections. This case purely observational study done in the department of Anatomy JSS Medical college Mysuru during the routine dissection of Head and neck for Under graduate students. Intact to the midline of the neck incision give according to the Cunninghams Manual after reflecting the skin and fascia we noted that the absence of isthmus to thyroid gland 2 out of 10 formalin fixed cadavers. The full outlook awareness of agenesis of the isthmus and its associated thyroid anomalies will significantly contribute to Safety measures to be taken during surgical procedures to avoid surgery related complications and assurance diagnosis and planning.