Embryological the PL of the thyroid gland is derived from remnant of the thyroglossal duct situated in the pre-tracheal region between the isthmus and the hyoid bone during the descent of the foetal lingual thyroid to its normal anatomical position in intrauterine life. The PL may originate from the isthmus or on either lobe of thyroid gland, with a slight predilection for the left lobe. There are instances where non-removal of pyramidal lobe during a total thyroidectomy for a thyroid carcinoma can lead to recurrence of the disease. Developmental anomalies cause various morphological abnormalities in thyroid gland. Thyroid diseases are well documented and require medical and surgical interventions. Hence the present study was planned to study the anomalous development of thyroid gland in cadavers from Bihar region. The present study was planned in the Department of Anatomy, Anugrah Narayan Magadh Medical College, Gaya, Bihar from July 2016 Dec 2016. Total 25 cadavers were selected in the present study. The present study was planned to study the anomalous development of thyroid gland in cadavers from Bihar region. The data generated from the present study concludes that Morphology of the thyroid gland was studied in detail to found any anatomical variations and developmental anomalies. Recognition of anomaly is important to avoid unnecessary contralateral neck exploration with its potential morbidity and to ensure that all patients receive careful follow-up and appropriate thyroid hormone therapy when necessary. The knowledge of the various developmental anomalies of the thyroid gland and the variations in the neurovascular relations will help the surgeons in the better planning of a safe and effective surgery. Imaging of pyramidal lobe preoperatively especially in patients requiring total thyroidectomy would felicitate the treatment and monitoring of patient by decreasing relapses that may occur at a later time.