Giant gastrointestinal stromal tumor of the duodenum mimicking a pancreas head tumor: a case report

Duodenal gastrointestinal stromal tumor (GIST) is rarely observed in the system. It can be confused with pancreas pathologies as it shows an extramural growth pattern. The case here presented of a 65-year-old male who complaints abdominal pain, nausea and vomiting. On contrast tomography, centrally hypodense, necrotic mass, 140×115×100 mm size, was head. With preliminary diagnosis neuroendocrine tumour/serous cystic neoplasia, Whipple + partial vena cava resection primary repair operation performed. pathology reported duodenal GIST. patient discharged medication referred to oncology clinic.