CASE 24: 24 y/o female patient with acute abdominal pain

This case was provided from the renowned Centro Medico Hospital in Guatemala City.

Here is the brief history. Patient had some chronic digestive problems and developed malnutrition and low body weight consequently. She could not eat an entire meal or solids. Parents thought it was an anorexic problem. One day ago she suffered from an acute abdominal pain in epigastrium associated with nausea and vomiting so they decided to bring her to the ED.

She underwent a CT scan. Here is the CT spot image:

With this finding, they suggested an upper GI series (shown below):

Findings and diagnosis?