title: Synchronous gastric neuroendocrine carcinoma and hepatocellular carcinoma: a case report.
abstract: Gastric neuroendocrine carcinomas (NECs) are rare tumours that are divided into four subtypes depending on tumour characteristics. Patients with NECs are known to have an increased risk of synchronous and metachronous cancers mainly located in the gastrointestinal tract. A case of synchronous gastric NEC and hepatocellular carcinoma in a patient with several other precancerous lesions is presented. The patient had anaemia, and a gastric tumour and two duodenal polyps were identified on upper endoscopy. A CT scan of the abdomen revealed several lesions in the liver. The lesions were invisible on B-mode sonography and real-time sonography fused with CT was used to identify and biopsy one of the lesions. Histology showed hepatocellular carcinoma. A literature search showed that only one case of a hepatocellular carcinoma synchronous with a gastric NEC has been reported previously.
  
  
  BACKGROUND
  NCT00781924.
authors.affiliation: Rigshospitalet, Copenhagen University Hospital, Department of Radiology, Section of Ultrasound, Blegdamsvej 9, Copenhagen OE, 2100, Denmark.
authors.forename: Caroline
authors.initials: C
authors.lastname: Ewertsen
authors.forename: Birthe Merete
authors.initials: BM
authors.lastname: Henriksen
authors.forename: Carsten Palnæs
authors.initials: CP
authors.lastname: Hansen
authors.forename: Ulrich
authors.initials: U
authors.lastname: Knigge