[Why should we revaccinate children after stem cell transplantations?].

Stem cell transplantation is a procedure often used in treatment of proliferative and non-prolifarative diseases. Recipient's immunological system has been damaged during pretransplant and conditioning therapy: deprived from B- and T-cell mediated immunological response and memory cells. One of the prophylactic procedures against post-transplant infections in recipients is efficient and safe revaccination.

Lymphocyte populations in lymph nodes in different histological types of Hodgkin's disease in children.

Proliferating Reed-Sternberg and Hodgkin's cells within the lymph node in Hodgkin's disease (HD) affect the surrounding cells, which results in alterations of the proportion between T and B lymphocytes and the activation of these cells. The purpose of this study was to assay the changes within lymphocyte populations in lymph nodes in different types of HD. The lymph nodes of 10 children with nonmalignant, reactive changes, and 31 children with HD of the following types: mixed cellularity (MC; 11 cases), nodular sclerosis (NS; 17 cases) and lymphocyte depletion (LD; 3 cases) were included in the study.

Bone marrow morphology during haematopoietic stem cell mobilization with G-CSF in mice.

The aim of the work was to examine the morphology of the bone marrow of mice during stimulation with G-CSF. Experimental Balb C mice were daily injected subcutaneously with 250 microg/kg b.w.