BACKGROUND: The differentiation of extramedullary myelogenous @entity2800 ( @entity2800 ) from @entity706 can sometimes be difficult. In the current study, we explored the value of @entity2280 , @entity3335 and nonspecific esterase (Leder) stains in differentiating @entity706 . MATERIALS AND METHODS: Fifteen cases of phenotypically confirmed @entity2800 were stained for @entity2280 , @entity3335 and Leder stains. The same stains were performed in 16 @entity706 as controls. The @entity2800 cases were also immunostained for CD3 and @entity2225 to detect the incidence of aberrant T and B lymphocyte expression. RESULTS: @entity2280 was expressed in 7 of the 15 cases of @entity2800 (46%). @entity3335 was expressed in 10 of the 15 cases (66%), and Leder stain was positive in 9 cases (60%). All 15 cases had expression of at least one marker; 8 cases had expression of two markers and one case had expression of all 3 markers. None of the @entity706 showed expression of any of the three markers. Five cases (35%) of @entity2800 showed T cell antigen expression and 2 (14%) showed B cell antigen expression. CONCLUSION: Our findings suggest that in cases of @entity2800 , the use of the combination of @entity2280 , @entity3335 and Leder stains can help reach a definitive diagnosis, especially if @entity706 is difficult to exclude. Expression of B and T cell antigens in such lesions should not rule out the diagnosis of @entity2800 .

The value of XXXX , @entity3335 and chloroacetate esterase (Leder) stain in the diagnosis of granulocytic sarcoma.

@entity3335 :: ('4353', 'Gene') :: ['Myeloperoxidase', 'myeloperoxidase'] @entity706 :: ('MESH:D008223', 'Disease') :: ['lymphoma', 'malignant lymphomas', 'GS from lymphomas', 'malignant lymphoma', 'lymphomas'] @entity2225 :: ('54474', 'Gene') :: ['CD20'] @entity2800 :: ('MESH:D007951', 'Disease') :: ['GS', 'leukemia/granulocytic sarcoma'] @entity2280 :: ('947', 'Gene') :: ['CD34']
@entity2280 :: (947,Gene) :: ['CD34']
