Genetics of Familial Testicular Cancer

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00342537
Recruitment Status : Completed
First Posted : June 21, 2006
Last Update Posted : April 5, 2018
Information provided by (Responsible Party):
National Institutes of Health Clinical Center (CC) ( National Cancer Institute (NCI) )

Brief Summary:

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:

  • Identify the genes responsible for testicular germ cell tumor (TGCT) (testicular cancer) in families with an inherited tendency to develop the disease
  • Determine if the genes which predispose to developing testicular cancer also increase the risk of other specific types of cancer among first- and second-degree relatives of patients with TGCT
  • Determine if the microscopic appearance of familial testicular cancers is different from that of non-familial TGCT

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:

  • Patients with testicular germ cell cancer who have at least one other blood relative with the disease
  • Family members of patients (first- and second-degree relatives)

Participants undergo the following procedures:

  • Fill out questionnaires for providing information about a history of cancer in all blood relatives, including parents, siblings, children, grandparents, aunts, uncles, and cousins, and a history of undescended testes in male blood relatives. Participants may be asked permission to contact family members to request their help in the study as well.
  • Provide a blood sample for genetic testing related to TGCT (except in children under 16 years old).
  • Review of medical records and examination of tumor specimen (patients with TGCT only).
  • Confirmation of the diagnosis of other types of cancer in these same families (medical records, pathology repots)
  • Review of the testicular cancer tissue obtained at the time of surgery from members of multiple case families, and comparison of these findings with a series of TGCT which have developed in men without a family history.

Condition or disease
Testicular Cancer

Detailed Description:

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 : Observational
Actual Enrollment : 1842 participants
Observational Model: Family-Based
Time Perspective: Other
Official Title: Clinical, Genetic, Behavioral, Laboratory and Epidemiologic Studies of Familial Testicular Germ Cell Tumors
Study Start Date : December 31, 2003

Resource links provided by the National Library of Medicine

Primary Outcome Measures :
  1. Discovery of new testicular cancer susceptibilitygenes [ Time Frame: Duration of Study ]

Secondary Outcome Measures :
  1. Characterization of the familial testicular cancer syndrome phenotype [ Time Frame: Duration of Study ]

Information from the National Library of Medicine

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Ages Eligible for Study:   4 Years to 100 Years   (Child, Adult, Older Adult)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   No

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.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00342537

United States, Maryland
National Cancer Institute (NCI), 9000 Rockville Pike
Bethesda, Maryland, United States, 20892
Norwegian Radium Hospital
Oslo, Norway
United Kingdom
Institute of Cancer Research/Haddow Laboratories
Sutton, United Kingdom
Sponsors and Collaborators
National Cancer Institute (NCI)
Principal Investigator: Mark H Greene, M.D. National Cancer Institute (NCI)


Responsible Party: National Cancer Institute (NCI) Identifier: NCT00342537     History of Changes
Obsolete Identifiers: NCT00897598
Other Study ID Numbers: 999904076
First Posted: June 21, 2006    Key Record Dates
Last Update Posted: April 5, 2018
Last Verified: August 18, 2017

Keywords provided by National Institutes of Health Clinical Center (CC) ( National Cancer Institute (NCI) ):
Testicular Cancer
Cancer Epidemiology

Additional relevant MeSH terms:
Testicular Neoplasms
Endocrine Gland Neoplasms
Neoplasms by Site
Genital Neoplasms, Male
Urogenital Neoplasms
Genital Diseases, Male
Endocrine System Diseases
Testicular Diseases
Gonadal Disorders