A Gene Hunting Study for Familial Papillary Thyroid Cancer

The aim of this project is to identify genetic risk factors associated with familial
papillary thyroid carcinoma (PTC). This can be accomplished in several ways, including loss
of heterozygosity studies as well as comparative gene expression analysis. When possible,
linkage analysis on families with multiple individuals affected with PTC may also help
identify the putative gene(s).

Study participants will be asked to:

1. Complete family history and medical history questionnaires

2. Sign a medical record release so that thyroid cancer pathology reports can be obtained

3. Supply a blood sample for genetic studies

4. Provide study related information to family members who are needed for family studies

Eligibility Criteria:

- Patients with a diagnosis of PTC and a family history of PTC

- Affected and unaffected family members of the proband*

- For familial cases (families with 2 or more cases of PTC), participation will be
offered to all living family members with PTC or benign thyroid disease as well
as selected unaffected first and second degree relatives. Participation may also
be offered to spouses when needed for analyzing parent/offspring samples.