Primary carcinoid tumor of the common hepatic duct: A rare case with immunohistochemical and molecular findings.

Abstract:

:We report immunohistochemical (IHC) and molecular findings in a rare case of a carcinoid tumor of the extrahepatic bile ducts in a 33-year-old woman, who presented with a 3.9x2.8x2.6 cm mass within the right and common hepatic ducts. She underwent surgery and a carcinoid tumor was identified. This lesion is of interest because in addition to the morphological and cytological features of a typical carcinoid, it demonstrated a distinct pleomorphic area immunoreactive for gastrin. By molecular analysis, loss of heterozygosity (LOH) with opposite allelic patterns between the gastrin-positive and gastrin-negative areas of the tumor was identified. The molecular studies for LOH along with the morphology and IHC profiling suggest that this second population of gastrin-positive carcinoid cells may represent a new clone within the carcinoid tumor with differentiation toward gastrin production or may represent the next step in the carcinogenic process with a gradual emergence of a more aggressive clone.

journal_name

Oncol Rep

journal_title

Oncology reports

authors

Ligato S,Furmaga W,Cartun RW,Hull D,Tsongalis GJ

keywords:

subject

Has Abstract

pub_date

2005-03-01 00:00:00

pages

543-6

issue

3

eissn

1021-335X

issn

1791-2431

journal_volume

13

pub_type

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