A form of cellular resistance which has been intensively investigated in our laboratories is one that is directed against Mycobacterium tuberculosis. This cellular resistance, which is readily demonstrated with the histiocytes of rabbits immunized with the BCG strain of tubercle bacillus, is expressed in a number of ways depending upon the conditions of experimentation; one expression of this r...

localized leishmania lymphadenitis (l.l.l) is a self limited clinical presentation of cutaneous leishmaniasis. microscopic findings in l.l.l are very similar to toxoplasma lymphasenitis. in all cases, an intensive microscopic search should be done for leishman bodies. in this study, we describe our microscopic findings and results of our immnohistochemical (ihc) study with a panel of monoclonal...

the authors describe a case of histiocyte-rich b-cell lymphoma (hr-bcl), a variant of diffuse large b-cell lymphoma, in a 51-year-old man. the patient presented with large axillary lymphadenopathy. histopathologic and immunohistochemical examination of lymph node biopsy revealed diffuse effacement of the lymph node architecture by reactive histiocytes and neoplastic cd20 positive b cells. react...

: ALK-positive histiocytosis is a rare malignancy which was first described in 2008 and recognized as systemic histiocytic disorder that can affect multiple organs. Less than 20 cases were reported to date, much fewer presented disseminated disease, especially with lung central nervous system (CNS) involvement. The clinical presentation, cytologic histologic features diverse prior cases. Diagno...

which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. A 47-year-old man from a region endemic for leprosy presented with a 1-month history of high grade fever and red, raised skin lesions on the upper limbs. He had multiple tender papules and nodules on his forearm and thigh along with sensory loss and thickeni...

In the “Images in Hematology’’ section of the Journal, And›ç et al. [1] briefly presented sea-blue histiocytes in a 45-year-old woman with type B Niemann-Pick disease [2,3]. I believe the cell photographed by the authors is fairly typical for Niemann-Pick disease with few nuclear remnants and superimposed lymphocytes. In my opinion, it is not typical for sea-blue histiocytes. We have seen sea-b...