EURORAD ESR

Case 14047

Ectopic Infrahyoid Thyroid with Coexisting Orthotopic Thyroid Gland

Author(s)
Jennifer Sasson, Robert Stuver, Zain Badar, Anthony Mohamed, Sajeev Ezhapilli Chennan

SUNY Upstate Medical University Hospital
SUNY Upstate Medical University
Department of Radiology
750 East Adams Street
Syracuse, New York, United States of America
E-mail: sassonj@upstate.edu
 
Patient
female, 37 year(s)
 
 
  • Figure 1
    Axial Contrast-Enhanced CT

    Note the well-circumscribed, nodular, homogenously enhancing tissue at the level of the larynx, between the sternohyoid muscles, anterior to the laryngeal prominence, and within the infrahyoid portion of the neck,...

     
    Area of Interest: Head and neck; Imaging Technique: CT; Procedure: Diagnostic procedure; Special Focus: Congenital;
     
     
  • Figure 2
    Sagittal Contrast-Enhanced CT

    Note the avidly enhancing tissue inferior to the hyoid bone, anterior to the laryngeal prominence of the thyroid cartilage, suggestive of ectopic thyroid tissue (purple arrow).

     
    Area of Interest: Head and neck; Imaging Technique: CT; Procedure: Diagnostic procedure; Special Focus: Congenital;
     
     
  • Figure 3
    Axial Post-Contrast CT

    Note the residual orthotopic thyroid tissue (green arrow) within the right thyroid lobe after patient’s thyroidectomy. Note the attenuation value of 174 HU.

     
    Area of Interest: Head and neck; Imaging Technique: CT; Procedure: Diagnostic procedure; Special Focus: Endocrine disorders;
     
     
  • Figure 4
    FDG-PET Scan

    Note that there is no uptake within the infrahyoid ectopic tissue (red arrow), thereby ruling out thyroid neoplasm within this ectopia.

     
    Area of Interest: Head and neck; Imaging Technique: PET; Procedure: Diagnostic procedure; Special Focus: Neoplasia;
     
     
Note the well-circumscribed, nodular, homogenously enhancing tissue at the level of the larynx, between the sternohyoid muscles, anterior to the laryngeal prominence, and within the infrahyoid portion of the neck, suggestive of ectopic thyroid tissue.
 
Note the avidly enhancing tissue inferior to the hyoid bone, anterior to the laryngeal prominence of the thyroid cartilage, suggestive of ectopic thyroid tissue (purple arrow).
 
Note the residual orthotopic thyroid tissue (green arrow) within the right thyroid lobe after patient’s thyroidectomy. Note the attenuation value of 174 HU.
 
Note that there is no uptake within the infrahyoid ectopic tissue (red arrow), thereby ruling out thyroid neoplasm within this ectopia.
 
 
 
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