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