EURORAD ESR

Case 15164

Thyroglossal duct cyst involving the floor of the mouth

Author(s)
Maria Ana Serrado1, Sofia Dutra2, José Maria Barros3

1Hospital Dr. Nélio Mendonça, SESARAM, E.P.E., Serviço de Imagiologia; Avenida Luís de Camões 9004-514 Funchal, Portugal; e-mail: m_serrado@hotmail.com
2Hospital do Divino Espírito Santo de Ponta Delgada, Serviço de Radiologia; Rua Grotinha 9500-370 Ponta Delgada, Portugal
3Hospital São José, Centro Hospitalar Lisboa Central, E.P.E., Departamento de Radiologia; Rua José António Serrano, 1150-199 Lisboa, Portugal
 
Patient
male, 26 year(s)
 
 
  • Figure 1
    Axial contrast enhanced-CT of the neck
     

    Axial post contrast CT shows an oval, hypodense lesion just off midline in the floor of the mouth.

     
    Area of Interest: Head and neck; Imaging Technique: CT; Procedure: Diagnostic procedure; Special Focus: Congenital;

    Sagittal contrast enhanced CT shows an elongated, hypodense lesion in the floor of the mouth.

     
    Area of Interest: Head and neck; Imaging Technique: CT; Procedure: Diagnostic procedure; Special Focus: Congenital;

    Coronal contrast enhanced CT shows a spherical, hypodense lesion (star) in the floor of the mouth, between genioglossus (asterisk) and geniohyoid (arrow) muscles.

     
    Area of Interest: Head and neck; Imaging Technique: CT; Procedure: Diagnostic procedure; Special Focus: Congenital;
     
     
  • Figure 2
    MRI of the neck
     

    Axial T1-weighted-image shows a hypointense lesion (star) between the geniohyoid (arrow) and genioglossus (asterisk) muscles, slightly to the right of midline.

     
    Area of Interest: Head and neck; Imaging Technique: MR; Procedure: Diagnostic procedure; Special Focus: Congenital;

    Axial T2-weighted-image shows a hyperintense and homogeneous lesion.

     
    Area of Interest: Head and neck; Imaging Technique: MR; Procedure: Diagnostic procedure; Special Focus: Congenital;

    Axial STIR images confirms the lesion as highly hyperintense, keeping with a simple cyst.

     
    Area of Interest: Head and neck; Imaging Technique: MR; Procedure: Diagnostic procedure; Special Focus: Congenital;

    Axial T1-weighted-image with fat suppression after gadolinium administration shows a non-enhancing thin wall.

     
    Area of Interest: Head and neck; Imaging Technique: MR; Procedure: Diagnostic procedure; Special Focus: Congenital;

    Sagittal STIR reveals an elongated hyperintense lesion, in communication with the foramen caecum.

     
    Area of Interest: Head and neck; Imaging Technique: MR; Procedure: Diagnostic procedure; Special Focus: Congenital;
     
     
  • Figure 3
    Annotated image

    Dotted line depicting the tract along which a thyroglossal duct cyst can develop. The floor of the mouth is slightly anterior to the usual migration route of the thyroid gland.

     
    Area of Interest: Head and neck; Imaging Technique: MR; Procedure: Diagnostic procedure; Special Focus: Congenital;
     
     
Axial post contrast CT shows an oval, hypodense lesion just off midline in the floor of the mouth.
 
Sagittal contrast enhanced CT shows an elongated, hypodense lesion in the floor of the mouth.
 
Coronal contrast enhanced CT shows a spherical, hypodense lesion (star) in the floor of the mouth, between genioglossus (asterisk) and geniohyoid (arrow) muscles.
 
Axial T1-weighted-image shows a hypointense lesion (star) between the geniohyoid (arrow) and genioglossus (asterisk) muscles, slightly to the right of midline.
 
Axial T2-weighted-image shows a hyperintense and homogeneous lesion.
 
Axial STIR images confirms the lesion as highly hyperintense, keeping with a simple cyst.
 
Axial T1-weighted-image with fat suppression after gadolinium administration shows a non-enhancing thin wall.
 
Sagittal STIR reveals an elongated hyperintense lesion, in communication with the foramen caecum.
 
Dotted line depicting the tract along which a thyroglossal duct cyst can develop. The floor of the mouth is slightly anterior to the usual migration route of the thyroid gland.
 
 
 
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