Has she nausea, vomiting, urinary complaints, loss of appetite, bloating, heart burn, pain related to meals, constipation/diarrhea?
She should be seen by a gastroenterologist. She would require further investigations like;
1) A CT scan with intravenous and oral contrast
2) Ultrasound of the whole abdomen
These would give the diagnosis or further guidelines for the work up.
Please feel free for your follow up questions.