Granular acute lymphoblastic leukemia: a case report and literature review.

Authors report a rare case of granular acute lymphoblastic leukemia (ALL) in a 45-year-old woman with a history of multiple myeloma. The patient's lymphoblasts contained large numbers of distinctive cytoplasmic granules closely mimicking heavily granulated myeloblasts in acute myeloid leukemia. These blasts were completely negative for myeloperoxidase but positive for acid phosphatase and Periodic Acid-Schiff reaction by cytochemical staining.

A 70-year-old woman with acute renal failure. Crystal-storing histiocytosis.

Crystal-storing histiocytosis (CSH) is a rare disorder characterized by accumulation of immunoglobulin light chain within histiocytes in one or more organ systems, typically in association with multiple myeloma or, less frequently, with other conditions such as lymphoplasmacytic lymphoma, the use of certain medications, or even polyclonal gammopathies. The reason why only a few patients with multiple myeloma develop CSH, while the majority do not, is unknown, but it may at least partially reflect a defect in intralysosomal degradation because simple light chain overproduction is not sufficient for the development of CSH. Interestingly, CSH is associated with improved survival in multiple myeloma patients, perhaps due to earlier detection and treatment of myeloma because of the symptoms associated with CSH.

5q- syndrome in a child with slowly progressive pancytopenia: a case report and review of the literature.

5q- syndrome is a rare myelodysplastic process occurring predominately in middle aged to elderly women. In children, myelodysplasia of all types is rare and 5q- syndrome is exceptionally rare. Only 6 cases of 5q- associated myelodysplasia have been reported in children and all 6 cases had blast counts >5% and/or additional cytogenetic abnormalities.

Hodgkin lymphoma-like posttransplant lymphoproliferative disorder (HL-like PTLD) simulates monomorphic B-cell PTLD both clinically and pathologically.

Although Hodgkin lymphoma-like posttransplantation lymphoproliferative disorder (HL-like PTLD) has been grouped with classic Hodgkin lymphoma type PTLD (HL-PTLD), controversy remains as to whether it is truly a form of HL or whether it should be more appropriately classified as a form of B-cell PTLD. Because only few cases of HL-like PTLD have been reported, their pathologic nature and clinical behavior have not been well defined. This report characterized 5 cases of HL-like PTLD with respect to their immunophenotype, EBV status, clonality, and clinical outcome.

Anaplastic large cell lymphoma associated with Epstein-Barr virus following cardiac transplant.

Posttransplantation lymphoproliferative disorders (PTLDs) eventually occur in approximately 5% of all organ transplant recipients. Most of cases are B-cell proliferations associated with the Epstein-Barr virus (EBV). T-cell PTLDs are relatively rare, although some estimate that up to 14% of posttransplantation malignant lymphomas are T-cell lymphomas even though only a few of these cases are described in the literature.