by Manfred ****, M.D.Professor of Medicine and
Radiology, Director
Thyroid Unit, New York University School of Medicine....
"Each lobe has a smooth globular-shaped contour and is no more than 3 – 4 centimeters in height, 1 – 1.5 cm in width, and 1 centimeter in depth. The isthmus is identified, anterior to the trachea as a uniform structure that is approximately 0.5 cm in height and 2 – 3 mm in depth. Measurement are the height, width, depth of each lobe.