We have defined two subpopulations of B lymphocytes in chronic lymphocytic leukemia (CLL). The major variant (termed typical) was characterized by the presence of a relatively homogeneous population of small-to-medium-sized lymphocytes with low-density SmIgM and no evidence of intracellular Ig synthesis. A minor group (termed atypical) was identified by the presence of a pleomorphic cell popula...

Atypical lymphocytes (ATL) appear in the circulation of a large proportion of patients during the first week following a blood transfusion. In order to determine the source of these ATL, cytogenetic studies were performed on the peripheral blood leukocytes of ten adult patients who received fresh blood from donors of the opposite sex. Nine of the ten patients had spontaneously dividing mononucl...

The World Health Organization (WHO) recently defined systemic Epstein-Barr virus (EBV)-positive T-cell lymphoproliferative disorders (LPD) of childhood as a life-threatening illness. However, this rare disease has not been extensively studied. Here we report a case of systemic EBV-positive T-cell LPD in a previously healthy middle-aged man with a chief complaint of chronic diarrhea. The initial...

Chronic rhinosinusitis (CRS) is one of the most common persistent disorders developed world, requiring input from various specialists including primary care physicians, otolaryngologists, respiratory and allergologists. B-cell lymphoproliferative (BLPDs) are a heterogenous group malignant conditions defined by an accumulation mature B lymphocytes in bone marrow, blood, lymphoid tissues. We pres...

BACKGROUND Typical and atypical optic neuritis (ON) are two clinical types of autoimmune inflammatory diseases of the optic nerve that causes acute vision loss, and are difficult to distinguish in their early stages. The disturbance in the balance of Th17 and Treg lymphocytes is thought to play an essential role in these autoimmune inflammatory diseases. OBJECTIVES To detect the clinical rele...

BACKGROUND African swine fever virus (ASFV) is the causative agent of African swine fever (ASF) that is the significant disease of domestic pigs. Several studies showed that ASFV can influence on porcine blood cells in vitro. Thus, we asked ourselves whether ASFV infection results in changes in porcine blood cells in vivo. A series of experiments were performed in order to investigate the effec...

Figure 3. Scalp with prominent epidermal and follicular involvement by atypical lymphocytes (50x). Abstract We present an atypical case of Sézary syndrome in a 46-year-old African American female who presented with tenderness, pruritus, hyperpigmented lesions and lymphadenopathy. Her condition was characterized by the retention of T-cell CD7 expression, significant atypical lymphocytic epidermo...

LTHOUGH infectious mononucleosis is a benign disease, many manifestations are similar to those observed in malignant transformation of lymphocytes. Among these are generalized lymphadenopathy and hepatosplenomegaly, the occurrence of morphologically abnormal cells in the periphera! blood and occasionally in the bone marrow, associated Coombs’ positive hemolytic anemias, and abnormal protein pro...