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Hum Pathol. 2007 Aug;38(8):1137-44.

Fluorescence in situ hybridization in diagnostic cytology.

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  • 1Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905, USA. halling.kevin@mayo.edu


Fluorescence in situ hybridization (FISH) is a technique that uses fluorescently labeled DNA probes to detect chromosomal alterations in cells. FISH can detect various types of cytogenetic alterations including aneusomy (ie, abnormalities of chromosome copy number), duplication, amplification, deletion, and translocation. Because tumor cells generally contain chromosomal alterations, FISH is able to detect cells that have chromosomal abnormalities consistent with neoplasia in exfoliative and aspiration cytology specimens. This review will discuss the utility of FISH for the detection of bladder, lung, pancreatobiliary, and esophageal carcinoma in cytologic specimens.

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