Abstract
Primary neuroendocrine tumors (NETs) in the heart are exceptionally rare. Here, we report a case found at our hospital of a 51-year-old woman with a primary left ventricular NET. The patient presented with non-causal recurrent diarrhea for 2 years, abdominal pain, and vomiting. Endoscopy revealed chronic proctitis and duodenal ulcer but found no explanation for the clinical symptoms. Comprehensive cardiovascular tests were conducted, and a mass measuring 26 mm × 41 mm × 30 mm was detected in the left ventricle. The patient underwent complete surgical resection to remove the tumor. Postoperative pathological results indicated a NET. No recurrence or other signs of metastasis were experienced during a 13-month follow-up observation period. Herein, we report this case and describe the imaging manifestations and clinical diagnosis strategy of this rare tumor. A diagnosis of NET of the heart may be considered when there are unexplained abdominal symptoms and without an abdominal or pelvic mass.