Benign epithelial or sebaceous cyst

Case contributed by Chris O'Donnell
Diagnosis certain

Presentation

Mass in soft tissues overlying the left shoulder blade ?lipoma clinically

Patient Data

Age: 40 years
Gender: Male

Well-defined ovoid mass in the subcutaneous fat: solid, whorled internal appearance with minimal peripheral enhancement

ultrasound

Solid-appearing mass without blood flow on Doppler analysis and subsequent ultrasound-guided biopsy.

Case Discussion

Concern on MRI and US regarding the possibility of a soft tissue sarcoma or even neurofibroma.  On percutaneous biopsy the internal material was keratin with normal skin structures on the margins, typical of an epithelial cyst.

How to use cases

You can use Radiopaedia cases in a variety of ways to help you learn and teach.

Creating your own cases is easy.