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Some observations on the ultrastructure of a malignant islet cell tumor associated with duodenal ulceration and severe diarrhea.

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Pancreatic somatostatinoma: a case report and review of the literature.

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A 56-year-old man underwent distal pancreatectomy, splenectomy, and partial resection of the splenic flexure of the colon because of tumor in the tail of pancreas and the splenic hilus. The patient presented with symptoms of general malaise, anorexia, weight loss, mild diarrhea, and borderline

Somatostatin receptor scintigraphy of malignant somatostatinoma with indium-111-pentetreotide.

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This article describes the visualization of a pancreatic somatostatinoma and liver metastases using 111In-pentetreotide imaging in a patient with somatostatinoma syndrome. A 61-yr-old woman with gallbladder stones, diabetes, weight loss, diarrhea and steatorrhea, immunohistochemical diagnosis of

Calcitonin-producing pancreatic somatostatinoma: report of a case.

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A 59-year-old woman was hospitalized due to a 1-year history of diarrhea and weight loss. Echography and computed tomography of the abdomen revealed a 10 x 7 cm solid mass in the tail of the pancreas and gallstones, while selective celiac angiography revealed the presence of a hypervascular mass.

Hypercalcitonemia revealing a somatostatinoma.

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Somatostatinoma are rare well-differentiated endocrine tumors with malignant behavior arising from the pancreas and duodenum. They are defined by somatostatin positive immunostaining of the majority of tumor cells. The main clinical features are diabetes, diarrhea and biliary lithiasis related to

Gastric somatostatinoma: an extremely rare cause of upper gastrointestinal bleeding.

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A 49-year-old woman presented with chronic abdominal discomfort, significant weight loss, and chronic intermittent diarrhea. She suddenly developed massive upper gastrointestinal bleeding and was referred for further treatment. Endoscopy indicated a large mass in the upper gastric body with antral

Somatostatinoma syndrome: does a clinical entity exist?

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We report here 2 patients with somatostatin-secreting tumours and hypersomatostatinaemia. One subject, a 36 year old woman with diabetes, flushing, labile blood pressure and diarrhea, had elevated basal plasma levels of somatostatin-like immunoreactivity (SLIR) and calcitonin. Plasma SLIR increased

Early somatostatinoma of the papilla of the duct of Santorini.

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We studied a patient with a very small somatostatinoma that arose from the prominence of the orifice of the duct of Santorini. The patient presented clinically with epigastric discomfort, marked loss of weight, diarrhea, exertional dyspnea, and chest pain. He flushed intermittently and had

A large functional somatostatinoma in the pancreatic tail: atypical CT appearances.

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Somatostatinomas are extremely rare endocrine tumors, and those with diameters above 2 cm are reported to increase the risk of metastasis significantly. We report a case of a large functional somatostatinoma in the pancreatic tail without metastases. A 46-year-old woman with a history of recurrent

[Somatostatinoma of the Vater's papilla in a patient with von Recklinghausen's disease].

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BACKGROUND Somatostatinomas of the gastrointestinal tract secret hormon somatostatin which can cause "inhibitory syndrom" comprising diabetes mellitus, cholelithiasis and steatorrheic diarrhea. It is also secreted by the D cells of Langerhans's islands of the pancreas as well as endocrine cells of

Calcitonin-producing pancreatic somatostatinoma.

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A pancreatic somatostatinoma metastatized to the liver was detected in a 70-yr-old woman presenting with chronic diarrhea, steatorrhea, pancreatic insufficiency, diabetes mellitus, and achlorhydria. At immunocytochemistry, most tumor cells stored both somatostatin and calcitoninlike substances.

Overview of chronic diarrhea caused by functional neuroendocrine neoplasms.

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Eight different neoplastic disorders can cause chronic diarrhea attributable to humoral-mediated diarrhea. These include pancreatic endocrine tumor (PET) syndromes (gastrinomas, VIPomas, glucagonomas, somatostatinomas, PET's releasing calcitonin), carcinoid syndrome, medullary thyroid cancer, and

[Duodenal somatostatinoma. Anatomic/clinical study of 12 operated cases].

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OBJECTIVE Duodenal somatostatinomas (DS) are very rare neuro-endocrine tumours. The aim of this retrospective and multicentric study was to report the clinical and pathological characteristics of these neoplasms in a series of 12 patients and to compare them with the literature. METHODS From 1987 to

Diagnostic usefulness of FDG-PET for malignant somatostatinoma of the pancreas.

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A 24-year-old female complaining of diarrhea and back pain was admitted to hospital where a tumor of the pancreatic head was revealed on a computed tomography (CT) scan. Abdominal ultrasonography, CT and celiac angiography revealed a hypervascular lesion on the pancreas. An endocrine tumor,

Comparative diagnostic value of the calcium-pentagastrin test versus the tolbutamide test in a patient with a somatostatinoma.

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We describe a patient with a small somatostatinoma of the papilla of Vater without clinical evidence for diabetes mellitus, diarrhea, steatorrhea, or cholelithiasis, showing normal plasma basal levels for somatostatinlike immunoreactivity. The diagnosis was based on histologic and

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