[A case report of familial dyskeratosis congenital. Case report].

Dyskeratosis congenita (DC) is a hereditary syndrome of bone marrow failure, which develops because of telomeres defects and combines with cancer predisposition. Its classical clinical features are skin pigmentation, nail dystrophy, oral leukoplakia (skin-mucosa triad). The goal is to describe the algorithm of diagnosis, clinical specificities of DC and specific treatment for cases of DC in one family. The present report includes descriptions of diagnosis and treatment of family members diagnosed for the first time as having a DC. The report shows an importance of all diagnostic stages: from a medical history and clinical picture to an application of modern high-tech diagnostic methods (flow-FISH, NGS). The report underlines an importance of diagnosis of all family members for excluding an asymptomatic form after a case of DC has been already detected in that family. A high frequency of a toxicity and secondary neoplasia makes it necessary to realize an individual approach at treatment of each patient with DC (the earliest start of androgen treatment, prompt decision of implementation of allogenic hematopoietic stem cell transplantation). The knowledge of pathogenesis, clinical features and principles of diagnosis and therapy of this disease is relevant to pediatricians and hematologists.

[Numbers of early CD34+ progenitors of bone marrow hematopoiesis in patients with diffuse large B-cell lymphoma]. / Kolichestvo rannikh predshestvennikov krovetvoreniia CD34+ v kostnom mozge u bol'nykh diffuznoi V-krupnokletochnoi limfomoi.

AIM: To estimate the number of early progenitors of bone marrow (BM) hematopoiesis in patients with diffuse large B-cell lymphoma (DLBCL) in the late period after high-dose chemotherapy (HDCT) according to the mNHL-BFM-90 program. SUBJECTS AND METHODS: The investigators analyzed the results of BM immunophenotypic and histological studies in 40 patients (median age, 57 years) with DLBCL who received HDCT according to the mNHL-BFM-90 program at the Hematology Research Center (HRC), Ministry of Health of the Russian Federation (MHRF), in the period 2002 to 2009. A comparison group consisted of 19 patients (median age, 70 years) treated according to the CHOP/R-CHOP program at HRC, MHRF, in the same period. The median follow-up period was 6 years. The results of BM examination were analyzed before and 5-10 years after the end of HDCT. Immunophenotypic study determined the number of early CD34+ hematopoietic progenitors. BM cellularity, the size of erythroid, granulocytic and megakaryocytic lineages, their ratio, the presence of dysplasia signs, and secondary stromal changes were histologically determined. The BM toxic injury signs found for the first time were evaluated as manifestations of late myelotoxicity. RESULTS: At 5-to-10-year follow-ups after the end of HDCT according to the mNHL-BFM-90 program, the patients showed a smaller number of early CD34+ progenitors of BM hematopoiesis in 31 (78%) cases than those treated according to the CHOP/R-CHOP-21 program (n=8 (2%)) (p=0.005). Myelopoiesis with decreased CD34+ cell count was characterized by hypocellularity in 8 (26%) patients (p=0.07), the narrowing of megakaryocytic lineage in 14 (45%) (p=0.006), erythroid one in 7 (23%) (p=0.01), and granulocytic one in 8 (26%) (p=0.92), pronounced secondary stromal changes in 15 (48%) (p=0.03), and grade 1 thrombocytopenia in 13 (42%); p=0.02). CONCLUSION: There is evidence that the number of early CD34+ progenitors of BM hematopoiesis decreased in patients with DLBCL in the late period after HDCT. The investigation shows the relationship of the reduction in the number of early CD34+ progenitors of BM hematopoiesis in the late follow-up period to the presence of pronounced secondary changes in the BM stroma (p=0.02). There was no statistically significant relationship of the decreased number of CD34+ cells to the age younger or older than 60 years, to the period after the end of chemotherapy, to gender or presence of specific BM injury.

[Late myelotoxicity of high-dose chemotherapy according to the modified NHL-BFM-90 program in adult patients with diffuse large B-cell lymphoma]. / Otdalennaya mielotoksichnost' vysokodoznoi khimioterapii po modifitsirovannoi programme NHL-BFM-90 u bol'nykh diffuznoi V-krupnokletochnoi limfomoi.

AIM: to evaluate late myelotoxicity (MT) relate to high-dose chemotherapy (CT) according to the modified NHL-BFM-90 (mNHL-BFM-90) program in adult patients with diffuse large B-cell lymphoma (DLBCL). SUBJECTS AND METHODS: The results of a complex clinical, laboratory, and instrumental examination, including cytologic, histologic, and routine cytogenetic studies of the bone marrow (BM), were analyzed in 40 DLBCL patients treated according to the mNHL-BFM-90 program in the National Research Center for Hematology (NRCH), Ministry of Health of the Russian Federation (MHRF), in 2002 to 2009; among them, there were 20 men and 20 women (median age, 57 years). A comparison group consisted of 19 patients who had received high-dose СНОР/R-СНОР-21 CT in HRC, MHRF, in the same period of time; out of them, there were 8 men and 11 women (median age, 70 years). The median posttherapy follow-up period was 6 years. The results of BM studies were analyzed before and 5-10 years after treatment in complete remission. The cytological and histological studies of BM determined its cellularity, the sizes of erythroid, granulocytic, and megakaryocytic lineages, their ratios, the signs of dysplasia, and stromal dysplastic changes. Routine BM cytogenetic study was conducted to identify karyological problems. Only myelopoietic changes that had been revealed for the first time 5-10 years after completion of CT were kept in mind as late MT. Cases of baseline and post-CT changes and those of baseline and no post-CT changes were not taken into account. RESULTS: Cytopenic syndromes (having no signs of myelopoietic lineage dysplasia or needing no blood component replacement transfusions) were revealed in 52% of the patients in the high-dose CT; thrombocytopenia amounted to 46%. In the late follow-up period, the patient group after high-dose mNHL-BFM-90 CT were found to have BM hypocellularity in 15 (38%) cases, a narrowing of erythroid and megakaryocytic lineages in 13 (33%) and 19 (48%) cases, respectively, and obvious secondary stromal changes in 17 (43%). The first 6 patients underwent routine BM cytogenetic study; all the patients were ascertained to have a normal karyotype; in this connection further BM study was stopped. CONCLUSION: The late MT of high-dose mNHL-BFM 90 CT is statistically significantly higher than that of the standard CHOP/R-CHOP-21 therapy. However, signs of myelodysplastic syndromes and those of cytopenia requiring blood component transfusions were observed in none patient.