monocyte

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monocyte

[′män·ə‚sīt]
(histology)
A large (about 12 micrometers), agranular leukocyte with a relatively small, eccentric, oval or kidney-shaped nucleus.
References in periodicals archive ?
Age, Site(s) Original Morphology y/Sex Diagnosis 1 68/F Neck LN LPL Small lymphocytes, plasmacytoid lymphocytes, and plasma cells with Dutcher bodies;many admixed, larger cells with pleomorphic nuclei;no sheets of large cells 2 88/M Bone marrow LPL Almost exclusively plasma-cell infiltrate, interstitial pattern 3 76/M Bone marrow LPL Plasmacytoid lymphocytes and plasma cells, nodular and interstitial pattern 4 62/F Bilateral MZL Small lymphocytes, orbital masses some monocytoid morphology;no plasmacytoid or plasma-cell component; prominent follicular colonization 5 65/M Salivary gland, MZL Small lymphocytes submandibular LN, with minor subsets inguinal LN showing monocytoid or minimally plasmacytoid morphology; scattered, admixed plasma cells Case No.
A, Note the expanded follicles with a nodular proliferation of intermediate-sized cells with monocytoid appearance and lymphoplasmacytoid differentiation.
The neoplastic cells may appear as monocytoid cells, centrocyte-like cells, or plasmacytoid cells and are distributed in nodular, diffuse, and interfollicular patterns.
Reactive follicles (E) and monocytoid B cells (F) are typical (hematoxylin-eosin, original magnifications x40 [A and E], x400 [B, C, and F], and x600 [D]).
Transformation of monocytoid B-cell lymphoma to large cell lymphoma associated with crystal-storing histiocytes.
35) The presence of monocytoid B cells in the lymph node may not be especially helpful as a distinguishing feature of nodal MZL because monocytoid cells have been described in LPL/WM.
Monocytoid B lymphocytes: their relation to the patterns of the acquired immunodeficiency syndrome (AIDS) and AIDS-related lymphadenopathy.
In this scenario, the foremost role of the pathologist is vigilant assessment of the histologic features by the conscious determination of whether any cytologic atypia exists, whether the cells appear monocytoid, whether plasma cells are increased, and whether lymphoepithelial lesions are evident.
Monocytoid B-cell lymphomas: an assessment of diagnostic criteria and a perspective on histogenesis.
Specifically, infectious mononucleosis caused by EpsteinBarr virus may present with architectural effacement or alteration due to marked paracortical expansion by proliferation of immunoblasts, follicular hyperplasia with characteristic mottled edges, prominent monocytoid B cells, abundant plasma cells, and varying degrees of necrosis.
The malignant cells can resemble small, mature lymphocytes, or can be monocytoid, plasmacytoid, or centrocyte-like (Figure 8, A through C).