Genetics of Familial Testicular Cancer
|First Received Date ICMJE||June 19, 2006|
|Last Updated Date||September 3, 2014|
|Start Date ICMJE||December 2003|
|Primary Completion Date||Not Provided|
|Current Primary Outcome Measures ICMJE
||Discovery of new testicular cancer susceptibilitygenes [ Time Frame: Duration of Study ] [ Designated as safety issue: No ]|
|Original Primary Outcome Measures ICMJE||Not Provided|
|Change History||Complete list of historical versions of study NCT00342537 on ClinicalTrials.gov Archive Site|
|Current Secondary Outcome Measures ICMJE
||Characterization of the familial testicular cancer syndrome phenotype [ Time Frame: Duration of Study ] [ Designated as safety issue: No ]|
|Original Secondary Outcome Measures ICMJE||Not Provided|
|Current Other Outcome Measures ICMJE||Not Provided|
|Original Other Outcome Measures ICMJE||Not Provided|
|Brief Title ICMJE||Genetics of Familial Testicular Cancer|
|Official Title ICMJE||Clinical, Genetic, Behavioral, Laboratory and Epidemiologic Studies of Familial Testicular Germ Cell Tumors|
This study is a collaboration between the Clinical Genetics Branch of the National Cancer Institute and the International Testicular Cancer Linkage Consortium (ITCLC). The primary goal of the ITCLC is mapping and cloning susceptibility genes for familial TGCT. The objectives of the current study are to:
Patients and family members recruited by the ITCLC in the United Kingdom, the Netherlands, and Norway are eligible for this study. Individuals with the following medical criteria may participate:
Participants undergo the following procedures:
Familial clustering of testicular germ cell tumors (TGCT) is well-documented, and a family history of TGCT is associated with an increased risk of this disease. The International Testicular Cancer Linkage Consortium (ITCLC) has assembled 350 multiple case TGCT families in support of a linkage effort that provisionally mapped a susceptibility gene to chromosome Xq27 in a subset of these kindreds. However, familial TGCT is genetically heterogeneous, thus increasing the need for meticulous case definition and classification in ongoing genetic and etiologic studies. The histopathologic classification of TGCT is very complicated; few pathologists have extensive experience reviewing this uncommon tumor. Basing epidemiologic studies upon local pathology reports may result in failure to recognize etiologically critical TGCT subsets of the kind which have been central to suspecting and defining various hereditary cancer syndromes, such as the multiple inherited renal cancer disorders.
Few studies have addressed the risk of cancer among relatives of sporadic TGCT patients. Recent reports suggest a 20% increase in overall cancer risk among first-degree relatives of TGCT patients and site-specific excess cancer risks in male relatives and in the mothers of TGCT patients. These cancer sites constitute diseases for which there is some prior evidence to suggest a genetic relationship to TGCT. Identification of other cancers as part of the familial TGCT disease spectrum would both provide clinically relevant insight into this syndrome, and enhance the statistical power of gene-seeking linkage analysis.
We propose two studies, each targeting the ITCLC set of high-risk TGCT families, none of which come from the US: (a) Centralized Pathology Review of Familial TGCT; and (b) The Occurrence of Cancer Other than Germ Cell Tumors in TGCT Families. Data will be provided by three of the largest ITCLC contributors; each will contact TGCT probands and their relatives and collect the primary data under their familial and non-familial TGCT, and perform the data analysis for both studies. NCI will neither seek nor receive individual identifying information from any participant. Currently, our UK collaborator has completed acquisition of a Federal Wide Assurance (FWA) and local ethical review. Since this group is contributing 70% of the families in these two projects, we now bring that component before the NCI Special Studies IRB. We shall return to the IRB for review of the other two contributors upon completion of their local ethical review process.
|Study Type ICMJE||Observational|
|Study Design ICMJE||Not Provided|
|Target Follow-Up Duration||Not Provided|
|Sampling Method||Not Provided|
|Study Population||Not Provided|
|Condition ICMJE||Testicular Cancer|
|Intervention ICMJE||Not Provided|
|Study Group/Cohort (s)||Not Provided|
* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
|Recruitment Status ICMJE||Completed|
|Estimated Enrollment ICMJE||2600|
|Completion Date||Not Provided|
|Primary Completion Date||Not Provided|
|Eligibility Criteria ICMJE||
The criterion establishing familial TGCT is the presence of at least two cases of documented GCT in blood relatives.
A case will be determined to have TGCT according to the following criteria:
Pathologic confirmation of a germ cell-derived tumor arising in the testis. Estragonadal sperm cell tumors will also be included.
Germ cell-derived histologies including: seminoma, embryonal carcinoma, endodermal sinus (yolk sac) tumor, gonadoblastoma, choriocarcinoma, teratoma, and mixed germ cell tumor.
A case will be determined to have TIN on the basis of pathologic confirmation of intratubular malignant germ cells (ITMGCs) as defined by Burke and Mostofi.
|Ages||4 Years and older|
|Accepts Healthy Volunteers||No|
|Contacts ICMJE||Contact information is only displayed when the study is recruiting subjects|
|Location Countries ICMJE||Norway, United Kingdom|
|NCT Number ICMJE||NCT00342537|
|Other Study ID Numbers ICMJE||999904076, 04-C-N076|
|Has Data Monitoring Committee||Not Provided|
|Responsible Party||Not Provided|
|Study Sponsor ICMJE||National Cancer Institute (NCI)|
|Collaborators ICMJE||Not Provided|
|Information Provided By||National Institutes of Health Clinical Center (CC)|
|Verification Date||August 2014|
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