Familial malignant lymphoma.
D000368:Aged; D005260:Female; D005770:Gastrointestinal Neoplasms / Q000235:genetics*; D006258:Head and Neck Neoplasms / Q000235:genetics*; D006801:Humans; D008223:Lymphoma / Q000235:genetics*; D008297:Male; D008875:Middle Aged