In carcinoma head of pancreas nausea and vomiting is due to
PRESENTING SYMPTOM FREQUENCY Jaundice Weight loss Abdominal pain Nausea/vomiting Pruritus Fever Gastrointestinal bleeding Ref: Sabiston 20th edition Pgno: 1544
External compression of duodenum
Poal vein infiltration
Proliferation and infiltration into duodenum
Chemotherapy related
G.I.T