Clinical Research Directory

Inclusion Criteria: * Any individual diagnosed with non-Hodgkin's lymphoma or Hodgkin's disease or chronic lymphocytic leukemia (CLL), who has a 1st degree relative (parent, sibling or child) with a lymphoproliferative disorder; or families in which the individual has a lymphoproliferative disorder, and an unusual clustering of frequent or premature solid tumors is also observed. * Family members of the individual, either affected or unaffected with lymphoma, who are contacted by the individual and agree to participate in the study. * Deceased family members may be included in the study. Public records such as death certificates may be used to confirm the history. Consent for medical records or tissue blocks will be obtained from the deceased family member's next of kin. The hierarchy of relatives defined as next of kin is spouse, offspring, parents and siblings. Archived tissue samples may be used for genetic research. * Age \> 18 years Exclusion Criteria: * Subjects without a family history of lymphoma