Radiotherapy and high dose chemotherapy with bone marrow transplantation or peripheral blood stem cell transplantation is frequently used as treatment for patients with cancers of the bone marrow or lymph nodes such as Hodgkin's disease, non-Hodgkin's lymphoma, leukemia or multiple myeloma. A common side effect of the radiotherapy and high dose chemotherapy is mucositis (inflammation of the inside of the mouth and throat resulting in pain and difficulty swallowing). Mucositis is often very severe such that patients receive intravenous nutrition and pain medication in the hospital.

In this study, an investigational recombinant human growth factor called Keratinocyte Growth Factor (rHuKGF) is being evaluated to determine its protective effect on the mucosal tissue and its ability to reduce the mouth and throat soreness.

Inclusion Criteria: * Patients with: non-Hodgkin's lymphoma, Hodgkin's disease, acute myelogenous leukemia, acute lymphoblastic leukemia, chronic myelogenous leukemia, chronic lymphocytic leukemia, or multiple myeloma * Eligible for fractionated total body irradiation (fTBI) plus high-dose chemotherapy followed by autologous PBPC support. * 18 years of age or older * Karnofsky performance status greater than or equal to 70% * Minimum of 1.5 Mio CD34+ cells/kg cryopreserved and to be transplanted * Informed consent for participation in the study Exclusion Criteria: * History of, or concurrent cancer other than NHL, Hodgkin's disease, AML, ALL, CML, CLL, multiple myeloma * Prior bone marrow or peripheral blood stem cell transplantation * Purged stem cell product * Currently active infection or oral mucositis * Congestive heart failure * Serum creatinine > 1.5x ULN * Direct bilirubin > 1.5x ULN * Transaminases > 3x ULN * Corrected DLCO < 50% of predicted * Subject is currently enrolled in, or has not yet completed at least 30 days since ending other investigational device or drug trial(s) or is receiving other investigational agent(s). * Subject is pregnant (eg, positive human chorionic gonadotropin [HCG] test) or is breastfeeding. * Subject refuses to use adequate contraceptive precautions. * Known hypersensitivity to any of the products to be administered during dosing, including E coli-derived products. * Inability to give a truly informed consent.