EURORAD ESR

Case 13801

Extratesticular epidermal inclusion cyst of the scrotum (ECR 2016 Case of the Day)

Author(s)
A.C. Tsili1, G.V. Mouka1, A.A. Ntorkou1, D. Giannakis2, S. Stavrou2, M.I. Argyropoulou1

(1) Department of Clinical Radiology
(2) Department of Urology,
Medical School, University of Ioannina;
Ioannina/GR
 
Patient
male, 7 year(s)
 
 
  • Figure 1
    Sonography of the scrotum
     

    Transverse sonographic image of the right hemiscrotum depicts a solid, heterogeneous extratesticular mass (arrow). The lesion is sharply defined, measuring 23 mm in maximal diameter.

     
    Area of Interest: Genital / Reproductive system male; Imaging Technique: Ultrasound; Procedure: Diagnostic procedure; Special Focus: Neoplasia;

    Sagittal sonographic image of the scrotum shows right extratesticular mass, clearly separated from the ipsilateral testis (long arrow). The lesion is hypoechoic, with multiple internal echogenic foci (arrowheads).

     
    Area of Interest: Genital / Reproductive system male; Imaging Technique: Ultrasound; Procedure: Diagnostic procedure; Special Focus: Neoplasia;

    Colour Doppler sonographic image depicts no internal Doppler signals (arrow).

     
    Area of Interest: Genital / Reproductive system male; Imaging Technique: Ultrasound-Colour Doppler; Procedure: Diagnostic procedure; Special Focus: Neoplasia;
     
     
  • Figure 2
    MRI examination
     

    Coronal T2-weighted image shows right extratesticular mass (arrow), close to the ipsilateral spermatic cord (long arrow), mainly hyperintense, with signal similar to that of normal testes (arrowheads), surrounded by a...

     
    Area of Interest: Genital / Reproductive system male; Imaging Technique: MR; Procedure: Diagnostic procedure; Special Focus: Neoplasia;

    Transverse T1-weighted image depicts homogeneous right extratesticular mass (arrow), isointense to the ispilateral testis (arrowhead).

     
    Area of Interest: Genital / Reproductive system male; Imaging Technique: MR; Procedure: Diagnostic procedure; Special Focus: Neoplasia;

    Transverse ADC (b= 900 s/mm2) shows lesion’s restricted diffusion (long arrow), due to the presence of keratin debris histologically. The ADC of the mass is 0.48 × 10-3mm2/s [right testis (arrowhead), 1.02 ×...

     
    Area of Interest: Genital / Reproductive system male; Imaging Technique: MR-Diffusion/Perfusion; Procedure: Diagnostic procedure; Special Focus: Neoplasia;

    Coronal dynamic contrast-enhanced subtracted image at early phase (120 seconds) depicts absence of lesion enhancement (long arrow), a finding strongly suggestive of benignity. Both testes (arrowheads) enhance...

     
    Area of Interest: Genital / Reproductive system male; Imaging Technique: MR-Diffusion/Perfusion; Procedure: Diagnostic procedure; Special Focus: Neoplasia;
     
     
Transverse sonographic image of the right hemiscrotum depicts a solid, heterogeneous extratesticular mass (arrow). The lesion is sharply defined, measuring 23 mm in maximal diameter.
 
Sagittal sonographic image of the scrotum shows right extratesticular mass, clearly separated from the ipsilateral testis (long arrow). The lesion is hypoechoic, with multiple internal echogenic foci (arrowheads).
 
Colour Doppler sonographic image depicts no internal Doppler signals (arrow).
 
Coronal T2-weighted image shows right extratesticular mass (arrow), close to the ipsilateral spermatic cord (long arrow), mainly hyperintense, with signal similar to that of normal testes (arrowheads), surrounded by a low signal intensity capsule.
 
Transverse T1-weighted image depicts homogeneous right extratesticular mass (arrow), isointense to the ispilateral testis (arrowhead).
 
Transverse ADC (b= 900 s/mm2) shows lesion’s restricted diffusion (long arrow), due to the presence of keratin debris histologically. The ADC of the mass is 0.48 × 10-3mm2/s [right testis (arrowhead), 1.02 × 10-3mm2/s].
 
Coronal dynamic contrast-enhanced subtracted image at early phase (120 seconds) depicts absence of lesion enhancement (long arrow), a finding strongly suggestive of benignity. Both testes (arrowheads) enhance moderately and homogeneously.
 
 
 
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