EURORAD ESR

Case 871

Dermoid Cyst in the Floor of the Mouth

Author(s)
L. Desnyder, R. Hermans, J. Gaens, A.L. Baert
 
Patient
female, 30 year(s)
 
 
  • Figure 1
    Axial SE T1-weighted MR image

    Axial SE T1-weighted MR image shows a large well-circumscribed mass in the floor of the mouth (diameter 6-4 cm) with central hyperintense material and a thick hypointense wall.

     
    Area of Interest: unknown; Imaging Technique: Axial SE T1-weighted MR image;
     
     
  • Figure 2
    Axial SE T2-weighted MR image

    On axial SE T2-weighted MR image the mass shows a highly intense signal (less intense in the center), and a hypointense wall.

     
    Area of Interest: unknown; Imaging Technique: Axial SE T2-weighted MR image;
     
     
  • Figure 3
    Coronal and sagittal T1-weighted MR images after contrast
     

    Gadolinium-enhanced T1-weighted MR images better demonstrate the topographic relationship of the mass to the surrounding muscles. Coronal T1-weighted MR image shows mass located above the mylohyoid muscle (arrows),...

     
    Area of Interest: unknown; Imaging Technique: Coronal and sagittal T1-weighted MR images after contrast;

    On sagittal T1-weighted MR image (midline section) the mass appears located cranially to the geniohyoid/mylohyoid muscles, displacing the intrinsic tongue muscles. The MRI findings are compatible with a cystic mass,...

     
    Area of Interest: unknown; Imaging Technique: Coronal and sagittal T1-weighted MR images after contrast;
     
     
Axial SE T1-weighted MR image shows a large well-circumscribed mass in the floor of the mouth (diameter 6-4 cm) with central hyperintense material and a thick hypointense wall.
 
On axial SE T2-weighted MR image the mass shows a highly intense signal (less intense in the center), and a hypointense wall.
 
Gadolinium-enhanced T1-weighted MR images better demonstrate the topographic relationship of the mass to the surrounding muscles. Coronal T1-weighted MR image shows mass located above the mylohyoid muscle (arrows), between the geniohyoid and genioglossal muscles (arrowheads).
 
On sagittal T1-weighted MR image (midline section) the mass appears located cranially to the geniohyoid/mylohyoid muscles, displacing the intrinsic tongue muscles. The MRI findings are compatible with a cystic mass, as suggested by the hyperintensity on T2. The mass is also hyperintense on T1, possibly due to lipid or viscous material. Histologic examination after resection revealed the diagnosis of an epidermoid cyst.
 
 
 
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