RESUMO
A case of intestinal angiocentric T/NK-cell lymphoma in a 58-year-old man is reported. The patient presented initially with panperitonitis because of perforation of sigmoid colon diverticulum. He underwent segmentectomy of involved bowel. Histologically, the intestinal wall showed diffuse infiltration of medium or large size lymphoma cells with angiocentric growth and necrosis. The lymphoma cells were CD56+, CD45RO+, CD3+, CD4-, CD8-, CD20-, and CD30- in paraffin sections with germline configuration of TCR-gamma gene, consistent with T/NK-cell lymphoma. Further staging revealed splenomegaly. Intestinal angiocentric T/NK cell lymphoma represents a distinct etiology of diverticulum with perforation.
Assuntos
Humanos , Masculino , Antígeno CD56/análise , Colo/patologia , Neoplasias do Colo/diagnóstico por imagem , Neoplasias do Colo/patologia , DNA de Neoplasias/análise , Diagnóstico Diferencial , Doença Diverticular do Colo/diagnóstico por imagem , Doença Diverticular do Colo/patologia , Cadeias Pesadas de Imunoglobulinas/genética , Células Matadoras Naturais/patologia , Células Matadoras Naturais/química , Linfoma de Células T/patologia , Linfoma de Células T/química , Pessoa de Meia-Idade , Necrose , Peritonite/diagnóstico por imagem , Peritonite/patologia , Receptores de Antígenos de Linfócitos T/genética , Tomografia Computadorizada por Raios XRESUMO
The aim of this project was to compare dual and tri-colour reagents for lymphocyte immunophenotyping. A total of 37 patient and normal specimens were immunophenotyped concurrently with the following mean values (% dual vs tri-colour): CD3 (69.4 vs 68.3) CD4 (24.0 vs 24.2) and CD19 (13.9 vs 12.6). A comparison of the results obtained using the paired t test showed that there were no significant differences for cells expressing CD3, CD4 and CD19. However, there was a significant difference in the NK (18.3 vs 16.3) cell component. A major advantage in using 3 colour immunophenotyping is the ability to analyse specimens that cannot be analysed using dual colour reagents due to debris or contamination of the gate with non-lymphocytic cells.
Assuntos
Antígenos CD19/análise , Complexo CD3/análise , Antígenos CD4/análise , Corantes , Citometria de Fluxo/métodos , Antígenos HLA-DR/análise , Humanos , Indicadores e Reagentes , Células Matadoras Naturais/química , Subpopulações de Linfócitos/químicaRESUMO
It is well fnown that an immunosuppresive rsponse occuts after acute trauma. Some cellular mediators participate in the pathogenesis of septic shock. However, the exact role of the lymphocyte subsets and natural killer (NK) activity in this condition is not clear. We studied NK cytolytic activity through a 51Cr liberation assay using K-562 target cells in 20 patients with initial septic shock (10 men and 10 females, mean age 41 years old). Lymphocyte subsets CD3 (T3), CD4 (T4), CD8 (T8), CD16 (Leu-11) and CD56 (Leu-19) wetre also studied by indirect immunofluorescence. Compared to tesults obtained in 20 healthy volunteers, patient's NK activity was decreased (4.6 ñ 3.9 vs 26.1 ñ 10, p < 0.025), CD16 was lower (10%/187 vs 15%/280 per ul) and CD56 was also lower (6%/120 vs 12%/224 per ul), p < 0,05. T lymphocyte subsers were also decreased: CD3 cells (1100 vs 1352 per ul) and CD4 cells (634 vs 873 per ul), p < 0.05. Thus, a severe decrease in NK cells and NK cell function as well as decreases in CD3 and CD4 lymphocyte subsets are present in the initial stages of septic shock. The predictive value of these findings is currently under study