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Objective: Our aim was to evaluate the contribution of flow cytometry (FC) analysis in patients with a histopathological diagnosis of mantle cell lymphoma (MCL) and to develop a reliable scoring system. Materials and Methods: We assessed the results of FC analysis in peripheral blood or bone marrow samples of 36 patients diagnosed with MCL by histopathological evaluation. Multivariate analysis identified 5 variables associated with MCL: CD23 negativity, CD5/19 common positivity, CD20/22 common bright positivity, FMC7 positivity, and clonal sIg bright positivity. A 5-point scoring system was devised using these parameters. Results: Twenty-five patients (69.4%) scored 5 points, 8 (22.2%) scored 4 points, and 3 (8.4%) scored 3 points. The diagnosis of MCL was confirmed by FC immunophenotyping in 91.6% of the patients. Conclusion: Our results suggest that a quintet diagnostic scoring system, which is considered to be reliable in the diagnosis of MCL, could make a substantial contribution to diagnosis and should be more widely introduced in practice. [ABSTRACT FROM AUTHOR]

Multiple myeloma is a malignant proliferation of plasma cells that mainly affects bone marrow. Pleural effusions secondary to pleural myelomatous involvement have rarely been reported in the literature. As it is rarely detected, we aimed to report a case in which pleural effusion of a multiple myeloma was confirmed as true myelomatous involvement by flow cytometry method. A 52-years old man presented to our clinic with chest and back pain lasting for 3 months. On the chest radiography, pleural fluid was detected in left hemithorax. Pleural fluid flow cytometry was performed. In the flow cytometry, CD56, CD38 and CD138 found to be positive, while CD19 was negative. True myelomatous pleural effusions are very uncommon, with fewer than 100 cases reported worldwide. Flow cytometry is a potentially useful and simple method for detection of pleural fluid involvement in multiple myeloma. [ABSTRACT FROM AUTHOR]

Abstract: Aim: We aimed to investigate the change in the number of stem cells and white cells in the early period following blood donation. Patients and Method: 22 male (71%) and 9 female (29%), 31 volunteers in total were included in the study. 450ml of whole blood were collected from each of the volunteers for the donation. Complete blood counts were performed on the volunteers before and at 6 and 24h after the donation and CD34+ cell counts per ml of peripheral blood were measured by flow cytometry technique. Results: There was a statistically significant increase in the number of CD34+ cells in the peripheral blood at 6h following blood donation (p <0.001). At 24h, however, there was a statistically significant decrease in the number of CD34+ cells, compared to 6h (p <0.001). There was a statistically significant increase in the number of leukocytes in the peripheral blood at 6h following blood donation (p <0.001). At 24h, there was a decrease in the number of leukocytes, which was statistically significant compared to 6h (p <0.001). When the difference in CD34+ cell and leukocytes counts before blood donation and at 24h after blood donation were compared, the results were not statistically significant. Conclusion: As the result of this study, a transient increase in the number of CD34+ cells in the peripheral blood after blood donation was demonstrated, with a decline in CD34+ cell counts back to levels prior to donation at 24h. [Copyright &y& Elsevier]