Acute lymphoblastic leukemia in infants represents an aggressive malignancy associated with a high incidence (approx. 80%) of translocations involving the Mixed Lineage Leukemia (MLL) gene. Attempts to mimic Mixed Lineage Leukemia fusion driven leukemogenesis in mice raised the question whether these fusion proteins require secondary hits. RAS mutations are suggested as candidates. Earlier resu...

introduction campylobacter jejuni is a slender, motile, non-spore-forming, helical-shaped, gram-negative bacterium. it is one of the most common causes of human gastroenteritis in the world. the aim of this study was to present a patient with acute lymphocytic leukemia (all), who was infected with campylobacter jejuni. conclusions c. jejuni should be considered in the differential diagnosis as ...

Chromatins prepared from leukemic lymphosarcoma cell(s), (LS), acute lymphoblastic leukemia cells, chronic lymphocytic leukemia cells and normal tissue culture lymphocytes (NC-37) were studied with respect to their chemical compositions, thermal denaturation profiles, and template activities. Acute lymphoblastic leukemia and LS chromatins had approximately 2 to 4 times the nonhistone protein an...

The runt-related transcription factor 1, RUNX1, is crucial in the development of myeloid and lymphoid cell lineages and has been reported to be mutated in myeloid malignancies in approximately 30% of cases. In this study, the mutational status of RUNX1 was investigated in 128 acute lymphoblastic leukemia patients. We detected a mutation rate of 18.3% (13 of 71) in patients with T-cell acute lym...

BACKGROUND Until recently, few molecular aberrations were recognized in acute lymphoblastic leukemia of T-cell origin; novel lesions have recently been identified and a certain degree of overlap between acute myeloid leukemia and T-cell acute lymphoblastic leukemia has been suggested. To identify novel T-cell acute lymphoblastic leukemia entities, gene expression profiling was performed and cli...

Chromatins prepared from leukemic lymphosarcoma cell(s), (LS), acute lymphoblastic leukemia cells, chronic lymphocytic leukemia cells and normal tissue culture lymphocytes (NC-37) were studied with respect to their chemical compositions, thermal denaturation profiles, and template activities. Acute lymphoblastic leukemia and LS chromatins had approximately 2 to 4 times the nonhistone protein an...

Leukemia is the most common malignancy in children which leads to immunosuppression and predisposes patients to opportunistic infections. We report a 12-year-old girl with acute lymphoblastic leukemia (ALL) who developed simultaneous infection with pneumocystis Jirovecii pneumonia and aspergillosis in the induction phase of chemotherapy. The patient developed pulmonary cavitation and pneumothor...

Acute myelofibrosis is characterized by pancytopenia of sudden onset, megakaryocytic hyperplasia, extensive bone marrow fibrosis, and the absence of organomegaly. Acute myelofibrosis in patients with acute lymphoblastic leukemia is extremely rare. We report a 4-year-old boy who was diagnosed as having acute massive myelofibrosis and acute lymphoblastic leukemia. Performing bone marrow aspiratio...

In six patients with acute leukemia (about 2% of the patients referred for acute lymphoblastic leukemia) the blast cells invading bone marrow and blood showed all the cytologic, cytochemical, and electron microscopy features of Burkitt's tumor cells. The presence of monoclonal surface immunoglobulins (their synthesis being proved by in vitro culture experiments), the binding of IgG aggregates, ...

We describe a 40-year-old woman with a history of precursor T-cell acute lymphoblastic leukemia who developed an orbital mass associated with diffuse infiltration of the paranasal sinuses. The clinical and radiologic findings suggested an orbital abscess. Examination of orbital and ethmoid sinus biopsy specimens revealed relapse of precursor T-cell acute lymphoblastic leukemia. Although orbital...