A 45-year-old patient complains of pain in the epigastric region, left subcostal area, abdominal distension, diarrhea, loss of weight. He has been suffering from this condition for 5 years. Objectively: the tongue is moist with white coating near the root; deep palpation of abdomen reveals slight pain in the epigastric region and Mayo-Robson’s point. Liver is painless and protrudes by 1 cm from the costal arch. Spleen cannot be palpated. What disease can be primarily suspected?