EURORAD ESR

Case 15002

Intraparotid Neurofibroma

Author(s)
Ricardo Correia1 MD, Sherry Zakhary2 MD and Peter Som2 MD

1 São João Hospital Centre, Department of Radiology, Oporto, Portugal
2 Icahn School of Medicine at Mount Sinai Hospital, Department of Radiology, New York, United States of America
 
Patient
male, 54 year(s)
 
 
  • Figure 1
    Contrast-enhanced CT
     

    (A) Axial contrast- enhancement CT shows a hypoattenuating well-defined right parotid lesion (asterisk).

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

    (B) On bone window there is enlargement of the right stylomastoid foramen (arrow) compared to the left side (arrowhead).

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

    (C) Coronal reconstruction shows extension of the fusiform shaped parotid lesion into the stylomastoid foramen.

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

    (A) Axial T1W imaging shows an isointense to muscle right parotid nodule, which on T1 fat-saturated post-contrast imaging (B) demonstrates mild homogeneous enhancement.

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

    (A) Axial T1W imaging shows an isointense to muscle right parotid nodule, that on T1 fat-saturated post-contrast imaging (B) demonstrates mild homogeneous enhancement.

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

    (C) On coronal T2W imaging the lesion has a hyperintense rim leading to a 'target sign'. This sign is characteristic of, although not specific for, neurofibroma.

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

    (D) Sagittal T2W imaging redemonstrates extension of the lesion into the stylomastoid foramen (arrow).

     
    Area of Interest: Head and neck; Imaging Technique: MR; Procedure: Diagnostic procedure; Special Focus: Neoplasia;
     
     
(A) Axial contrast- enhancement CT shows a hypoattenuating well-defined right parotid lesion (asterisk).
 
(B) On bone window there is enlargement of the right stylomastoid foramen (arrow) compared to the left side (arrowhead).
 
(C) Coronal reconstruction shows extension of the fusiform shaped parotid lesion into the stylomastoid foramen.
 
(A) Axial T1W imaging shows an isointense to muscle right parotid nodule, which on T1 fat-saturated post-contrast imaging (B) demonstrates mild homogeneous enhancement.
 
(A) Axial T1W imaging shows an isointense to muscle right parotid nodule, that on T1 fat-saturated post-contrast imaging (B) demonstrates mild homogeneous enhancement.
 
(C) On coronal T2W imaging the lesion has a hyperintense rim leading to a 'target sign'. This sign is characteristic of, although not specific for, neurofibroma.
 
(D) Sagittal T2W imaging redemonstrates extension of the lesion into the stylomastoid foramen (arrow).
 
 
 
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