**7. Conclusion**

In summary, Philadelphia chromosome is an abnormal chromosome 22, resulting from a reciprocal translocation between chromosomes 9 and 22, a specific marker in chronic myeloid leukemia. His research in myeloproliferative syndromes has multiple interests: Diagnostic, prognostic and therapeutic follow-up which contributes to better patient care. Its demonstration in myeloproliferative syndromes makes it possible to confirm the nature of the disease and to distinguish between CM and other myeloproliferative syndromes.
