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GE Portuguese Journal of Gastroenterology 2020-Apr

De novo Gastrinoma: A Case Report

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Arsénio Barbosa
Filipa Gomes
Luísa Fonseca
Tiago Maia
Jorge Almeida

Sleutelwoorden

Abstract

Gastrinomas are neuroendocrine tumors characterized by gastrin overexpression - 80% are sporadic and 20% are associated with multiple endocrine neoplasia type 1. A 75-year-old male patient, surgically treated at the age of 50 years for gastrinoma, followed on an outpatient basis because of chronic non-bloody diarrhea, was admitted to our hospital because of abdominal pain, watery diarrhea, and nonbiliary vomits. He was hypotensive and showed no response to fluids. Blood cultures were positive for Salmonella, and a diagnosis of septic shock due to Salmonella infection was made. The patient's condition improved, but the history of chronic diarrhea was still not explained. To investigate chronic diarrhea, gastrinoma recurrence was considered. Serum gastrin measurement was five times higher than the upper limit of the normal range (536 pg/mL). A positive somatostatin receptor scintigraphy was diagnostic for neuroendocrine tumor. Metastases were excluded. The patient was proposed to curative surgery, and a diagnosis of a well-differentiated neuroendocrine tumor was made.

Gastrinomas são tumores neuroendócrinos caracterizados por hipersecreção de gastrina - 80% são esporádicos e 20% associados a neoplasia endócrina múltipla tipo 1 (MEN1). Apresenta-se o caso de um homem, de 75 anos, tratado cirurgicamente aos 50 anos por gastrinoma, seguido em consulta de Medicina Interna por diarreia crónica não-sanguinolenta, internado no nosso hospital por dor abdominal, diarreia aquosa e vómitos não biliares. À admissão, apresentava-se hipotenso e pouco responsivo a fluidoterapia. As hemoculturas foram positivas para Salmonella e foi feito o diagnóstico de choque séptico por Salmonella. O doente melhorou, mas a história prévia de diarreia crónica não estava esclarecida. Para investigar a diarreia crónica, foi colocada como hipótese recidiva de gastrinoma. A medição de gastrina sérica foi cinco vezes superior ao limite superior do normal (536 pg/mL). A cintigrafia com receptores de somatostatina foi diagnóstica para tumor neuroendócrino. Foram excluídas metástases. O doente foi proposto para cirurgia curativa e foi feito o diagnóstico de tumor neuroendócrino bem diferenciado.

Keywords: Gastrinoma; Multiple endocrine neoplasia; Neuroendocrine tumor; Zollinger-Ellison syndrome.

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