hi. noted history of abdominal pain, inability to hold down food and liver cyst. it is best if you bring your husband to a doctor, preferably a gastroenterologist, for physical examination and clinical evaluation. upper GI problems (esophageal vs gastric pathology, obstructive lesions, etc.) must be ruled-out. liver cysts, depending on the size, can be observed and managed conservatively. diagnostics (such as endoscopy, ct-scan, blood exams, etc.) and management (medical and/or surgical if indications are found) will be directed accordingly. hope this helps. good day!! ~dr.kaye