Inclusion Criteria:

- Patient Is 20 To 74 Years Old

- Patient Has An Histopathologically Confirmed Fl, Or Other Indolent B-Nhl Or Mcl (Only
Relapsed / Refractory Fl Can Be Included Outside Japan.)

- Patient Has At Least One Measurable Lesion By Ct Scan Which Is Defined By Cheson's
1999 Criteria

- Patient Has Received At Least 1 But Up To 4 Prior Chemotherapeutic Regimen, The Most
Recent Therapy Must Have Failed To Induce A Partial Response, Or There Must Be
Recurrence In Case Of The Most Recent Therapy Has Shown Complete Response, Or There
Must Be Relapse In Case Of The Most Recent Therapy Has Shown Partial Response.

- Patient Must Have Adequate Organ And Marrow function

Exclusion Criteria:

- Patient Who Has Undergone Allogenic Transplant Treatment Or Autologous Stem Cell
Transplant Within 6 Months

- Patient With Other Active Malignancies Or Central Neurological Infiltration With
Lymphoma

- Patient With Severe Hepatic Insufficiency

- Patient With History Of Allergic Reactions Attributed To Any Component Of MK0683

- Patient Who Is Known To Be HIV Antibody-, Hbv Antigen- Or Hcv Antibody-Positive

- Patient Who Has Undergone Prior/Concomitant Treatment With MK0683 Or Other Hdac
Inhibitors