Mass of pancreatic head: carcinoma or lymph node?

This patient had non specific complaints. 

Ultrasound imaging showed a hypoechoic mass at the head of pancreas. 

Diagnostic possibilities: 

Carcinoma head of pancreas 

D/d: pancreatic lymph node

Observe the small mass near or on the pancreas head 

Liver was normal.

Color Doppler ultrasound images show a vessel entering the mass.

CT scan was advised. 

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sonography of pancreas