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Abstract

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Primary hepatic carcinoid tumors are extremely rare although the liver is a frequent
site of metastases from intestinal carcinoids. Recently we investigated a case of primary
hepatic atypical carcinoid in a 47-year-old man who had infested with Clonorchis
sinensis for 20 years. The resected right lobe of the liver was almost completely
occupied by a huge tumor, measuring 20¡¿19¡¿12 §¯. The cut surfaces of the mass were
solid, soft and pale yellow, accompanied by several small satellite nodules, measuring up
to 1.5 cm in diameter. Microscopically, the tumor consisted of polygonal to columnar
cells with eosinophilic granular cytoplasm forming numerous small acini and large
trabeculae. Their nuclei were round to polygonal with coarse chromatin, had obscure to
small nucleoli and frequent mitoses. There were multiple necrotic foci of taring sizes.
The surrounding dilated bile ducts contained several degenerating worms of Clonorchis
sinensis. The tumor cells were argyrophil-positive but argentaffin-negative.
Immunohistochemically, the tumor cells were positive for cytokeratin, chromogranin and
somatostatin but were negative for CEA, AFP, insulin, glucagon, ACTH, growth
hormone and prolactin. Ultrastructually, the tumor cells contained variable-sized
numerous electron dense neurosecretory granules. (Korean J Pathol 1995; 29: 807¡­810)

Å°¿öµå

Primary atypical carcinoid; Liver; Neurosecretory granules;

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