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131438 Pathology

A 53-year-old woman has had nausea, vomiting, and mid-epigastric pain for 5 months. On physical examination, there are no significant findings. An abdominal CT scan shows gastric outlet obstruction. Upper gastrointestinal endoscopy shows an ulcerated 2×4 cm bulky mass in the antrum at the pylorus. A urease test is positive. Which of the following neoplasms is most likely to be seen in a biopsy specimen of this mass?

AAdenocarcinoma
BLeiomyosarcoma
CNeuroendocrine carcinoma
DNon-Hodgkin lymphoma
Pathology
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