Pleomorphic adenoma - parotid

Case contributed by Dr Ammar Haouimi

Presentation

Painless swelling of the left parotid region.

Patient Data

Age: 35 years
Gender: Female
Ultrasound

There is a well-defined lobulated homogeneous hypoechoic soft tissue mass of the left parotid gland with posterior acoustic enhancement.

The right parotid gland (not shown) was normal.

MRI

The previously described left parotid mass appears lobulated well-defined of low signal on T1, high signal on T2 with progressive homogeneous enhancement on postcontrast dynamic sequence with no restricted diffusion. A peripheral hypointense rim is noted on T2 sequences representing most likely the fibrous capsule. 

The TIC (time signal intensity curve) shows a progressive and gradual enhancement of the tumor (TIC type A according to Yabuuchi et al classification). 

Pathology

Conclusion of the histological report

Histological appearances of a pleomorphic adenoma of the parotid gland with no signs of malignancy.

Case Discussion

The ultrasound and MRI appearances are most consistent with a pleomorphic adenoma of the parotid gland (pathologically proven).

 

Additional contributor: ZE Boudiaf, CHU, Constantine

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