Chromosome 1 abnormality is one of the most common cytogenetic findings in MM (Multiple myeloma). A major feature of B cell malignancies is the slow increase in malignant plasma cells grown in the bone marrow. The CKS1B gene is located at 1q21 of chromosome 1 long arm end. In the progression of myeloma disease, tandem repetition and skip translocations of the 1q21 band occur, whereas in patients with multiple myeloma, 1q amplification is associated with poor prognosis.