<prompt> All of the following immunohistochemical markers are positive in the neoplastic cells of granulocytic sarcoma, except -CD45ROCD43MyeloperoxidaseLysozyme  <response>: Granulocytic sarcoma Chloroma or myeloblastomaGranulocytic sarcoma or chloroma is a solid tumor composed of myeloblasts.A chloroma is an extramedullary manifestation of AML, i.e., it is a solid collection of leukemic cells occurring outside of the bone marrow.These tumor often have a green tint due to the presence of myeloperoxidase.Chloromas are more common in monocytic differentiation M4 M5 type AML.Though chloromas occur most commonly in patients with AML, they may also occur in a patient with : -Myelodysplastic syndromeMyeloproliferative syndromes Myelofibrosis, CML, Polycythemia Vera, Essential thrombocytosisWithout concomitant disease, i.e., Primary chloroma.Chloromas are positive for : -CD 68 CD 20 CD 117 LysozymeCD 43 CD 34 Myeloperoxidase 