Biliary Tract Malignancy

Detecting Tumor Cells in Cytology Specimens Using FISH

September 2011

Because most solid tumors exhibit aneuploidy (that is an abnormal number of chromosomes) and normal cells do not show chromosomal abnormalities, a technique that is known as FISH can be used to help determine if tumor cells are present in a specimen. FISH stands for fluorescence in situ hybridization and is a technique that utilizes fluorescently labeled probes to various DNA targets to determine if a cell has chromosomal abnormalities such as aneuploidy.

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Detecting Tumor Cells in Cytology Specimens

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• Introduction
• Disclosures
• Pancreatobiliary Strictures (PBS)
• Primary Sclerosing Cholangitis (PSC)
• Pancreatobiliary Strictures (PBS)
• Bile Duct Brushings
• Current Clinical Practice
• Factors That Influence Sensitivity Of Cytology Specimens
• Routine Cytology
• Cancer Is A Genetic Disorder That Results From Mutations
• Detecting Tumor Cells in Cytology Specimens Using FISH
• Types of FISH Probes
• FISH
• Sensitivity and Specificity of Various Tests for Detection of Pancreatobiliary Strictures Malignancy
• What Do We Do With These Data?
• Bile Duct Pathology Calculator
• Representative Test Report Using Bile Duct Calculator
• Bile Duct Calculator
• Impact of Disease Prevalence on Positive Predictive Value (PPV)
• Case 1
• Case 1 Cytologic Findings
• Case 1
• Case 1 Test Report Using Bile Duct Calculator
• Case 1
• Case 1
• Case 2
• Case 2 Cytologic Findings
• Case 2
• Case 2: Test Report Using Bile Duct Calculator
• Case 2
• Case 2
• Case 3
• Case 3 Cytologic Findings
• Case 3
• Case 3
• Case 3: Test Report Using Bile Duct Calculator
• Case 3
• Case 3
• Summary
• Summary
• Results
• Questions?