SHP-1, an SH2 domain-containing protein tyrosine phosphatase, is primarily expressed in hematopoietic cells and behaves as a key regulator controlling intracellular phosphotyrosine levels in lymphocytes. SHP-1 has been proposed as a candidate tumor suppressor gene in lymphoma, leukemia and other cancers, as it functions as an antagonist to the growth-promoting and oncogenic potentials of tyrosine kinase. Dysfunction in SHP-1 regulation causes abnormal cell growth and induces different kinds of cancers. human SHP-1 gene is located on chromosome 12p13, consists of 17 exons and spans approximately 17 kb of DNA with a transcription size of 2.4