Pyramidal Lobe and its Clinical Significance- Case Report and Review of Literature AD01-AD02
Dr. Rajani Singh,
Department of Anatomy, Veerbhadra Marg, AIIMS Rishikesh, Rishikesh, Uttaranchal, India.
Thyroid gland normally consists of two lobes, one in right and another in left side, connected by isthmus, is the largest endocrine gland with numerous variations pertaining to number of lobes, absence of isthmus, its size and location. One of the variations of thyroid gland is occurrence of pyramidal lobe which may arise from lobes or isthmus of the gland. A review of literature coupled with reporting of two cases of pyramidal lobe has been carried out in the department of Anatomy, AIIMS, Rishikesh. Two pyramidal lobes were detected in two female cadavers out of six cadavers fixed in 10% formalin during dissection of head and neck. Mean age of cadavers was 70 years. Mean lengths and widths of pyramidal lobes in two cadavers were 48.02 mm, 28 mm and 52.99 mm, 18.1 mm, respectively. Pyramidal lobe if not removed may cause recurrences after total thyroidectomy and also it may be site of certain cancers or metastases for some tumours. Hence, knowledge of pyramidal lobe is very important to clinicians.