TY  - CHAP
M1  - Book, Section
TI  - Disorders of the Thyroid Gland
A1  - Lee, Grace A.
A1  - Masharani, Umesh
A2  - Lalwani, Anil K.
Y1  - 2020
N1  - 
T2  - Current Diagnosis & Treatment Otolaryngology—Head and Neck Surgery, 4e
AB  - The  normal  thyroid  gland  is  located  anterior  to  the  trachea  and  midway  between  the  apex  of  the  thyroid  cartilage  and  the  suprasternal  notch  (Figure  44–1).  Important  neighboring  posterior  structures  include  the  4  parathyroid  glands  situated  behind  the  upper  and  middle  thyroid  lobes,  and  the  recurrent  laryngeal  nerves  coursing  along  the  trachea.  The  thyroid  consists  of  2  pear-shaped  lobes  connected  by  an  isthmus.  The  typical  dimensions  of  the  lobes  are  2.5  to  4.0  cm  in  length,  1.5  to  2.0  cm  in  width,  and  1.0  to  1.5  cm  in  thickness.  Also,  in  about  50%  of  patients,  a  small  pyramidal  lobe  is  present  at  the  isthmus  or  adjacent  part  of  the  lobes.  The  functional  unit  of  the  thyroid  is  the  follicle  consisting  of  a  central  collection  of  colloidal  material  (thyroglobulin)  surrounded  by  a  single  layer  of  polarized  epithelial  cells.  
SN  - 
PB  - McGraw-Hill Education
CY  - New York, NY
Y2  - 2024/04/17
UR  - accesssurgery.mhmedical.com/content.aspx?aid=1169078313
ER  -