Congenital dyserythropoietic anemias (CDAs) constitute a rare group of inherited red-blood-cell disorders associated with dysplastic changes in late erythroid precursors. CDA type I (CDAI [MIM 224120], gene symbol CDAN1) is characterized by erythroid pathological features such as internuclear chromatin bridges, spongy heterochromatin, and invagination of the nuclear membrane, carrying cytoplasmic organelles into the nucleus. A cluster of 45 highly inbred Israeli Bedouin with CDAI enabled the mapping of the CDAN1 disease gene to a 2-Mb interval, now refined to 1.2 Mb, containing 15 candidate genes on human chromosome 15q15 (Tamary et al. 1998). After the characterization and exclusion of 13 of these genes, we identified the CDAN1 gene through 12 different mutations in 9 families with CDAI. This 28-exon gene, which is transcribed ubiquitously into 4738 nt mRNA, was reconstructed on the basis of gene prediction and homology searches. It encodes codanin-1, a putative o-glycosylated protein of 1,226 amino acids, with no obvious transmembrane domains. Codanin-1 has a 150-residue amino-terminal domain with sequence similarity to collagens and two shorter segments that show weak similarities to the microtubule-associated proteins, MAP1B (neuraxin) and synapsin. These findings, and the cellular phenotype, suggest that codanin-1 may be involved in nuclear envelope integrity, conceivably related to microtubule attachments. The specific mechanisms by which codanin-1 underlies normal erythropoiesis remain to be elucidated.

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Iron deposits demonstrate characteristically shortened T2 relaxation times. Several previously published studies reported poor correlation between the in vivo hepatic 1/T2 measurements made by means of midfield magnetic resonance (MR) units and the hepatic iron content of iron-overloaded patients. In this study, the authors assessed the use of in vivo 1/T2 measurements obtained by means of MR imaging at 0.5 T using short echo times (13.4 and 30 msec) and single-echo-sequences as well as computed tomographic (CT) attenuation as a measure of liver iron concentration in 10 severely iron-overloaded patients with beta-thalassemia major. The iron concentrations in surgical wedge biopsy samples of the liver, which varied between 3 and 9 mg/g of wet weight (normal, less than or equal to 0.5 mg/g), correlated well (r = .93, P less than or equal to .0001) with the preoperative in vivo hepatic 1/T2 measurements. The CT attenuation did not correlate with liver iron concentration. Quantitative MR imaging is a readily available noninvasive method for the assessment of hepatic iron concentration in iron-overloaded patients, reducing the need for needle biopsies of the liver.

ABSTRACT. Sixty-four adult survivors of childhood cancer, recruited via Israel's largest pediatric cancer treatment center, participated in a multi-dimensional assessment of long-term adjustment and quality of life in the domains of educational achievement, employment status, military service, family status, health, and psychological well-being. Subjects had been diagnosed with cancer prior to age 18, were three years or more off therapy with no evidence of disease, and over 18 years old at the time of the study. Data from structured interviews were compared to responses on similar items from a control group with no history of serious illness during childhood, matched for age, sex, and parental education levels. Results indicated an overall pattern of integration into the social mainstream, with similar objective levels of achievement for survivors and controls for most measures of education, employment, significant relationships, and psychological well-being. Results also indicated certain areas of disadvantage, such as military recruitment difficulties, lower income levels, and higher rates of workplace rejection. Significantly, almost half of the survivor sample reported subjective feelings that their illness experience had impaired their achievement in several domains. Quality of life is considered an important outcome parameter in terms of clinical decision making as well as in guiding preventive and supportive

Ewing's sarcoma (ES) is the second most common primary malignant bone tumor in children and adolescents. Currently accepted clinical prognostic factors fail to classify ES patients' risk to relapse at diagnosis. We aimed to find a new strategy to distinguish between poor and good prognosis ES patients already at diagnosis. We analysed the gene expression profiles of 14 primary tumor specimens and six metastases from ES patients, using oligonucleotide microarray analysis. The over-expression of two genes was validated by quantitative PCR using the LightCycler system. We identified two distinct gene expression signatures distinguishing high-risk ES patients that are likely to progress from low-risk ES patients with a favorable prognosis of long-term progression-free survival. The microarray-based classification was superior to currently used prognostic parameters. Over-expressed genes in the poor prognosis patients included genes regulating the cell cycle and genes associated with invasion and metastasis, while among the downregulated genes were tumor suppressor genes and inducers of apoptosis. Our results indicate the existence of a specific gene expression signature of outcome in ES already at diagnosis, and provide a strategy to select patients who would benefit from risk-adapted improved therapy.

Summary The red blood picture was studied in detail from birth to 12 weeks. The low point in the red cell count was reached in the seventh week, which represented the turning point from a negative to a positive balance between cell production and destruction. From the dynamics of the total number of circulating red cells it was concluded that, although erythropoiesis slows down after birth, a considerable amount of red cell production takes place during the first few postnatal weeks. The MCHC increased significantly over the first 5–6 postnatal weeks and remained constant thereafter. Macrocytes predominated at birth. Their percentage distribution decreased after the second week with a corresponding increase in microcytes. The red cell density distribution curve in the neonatal period is sigmoid in shape. The range of densities is, however, wider than in the adult. The curve shifts gradually to the heavy side from birth to 5 weeks, while from 5 to 12 weeks a shift back to the light side is observed. Macrocytes preponderate in the light fractions.

BACKGROUND. Maintenance of telomeres, in most instances by reactivation of telomerase, is obligatory for the indefinite proliferation of tumor cells. The objective of this study was to evaluate telomere length and telomerase activity (TA) as markers for progression and prognosis in neuroblastoma. METHODS. Primary tumor samples from 51 patients were analyzed for telomere length and TA and were correlated with known prognostic parameters and outcome. RESULTS. Telomere length had a highly significant correlation with prognosis (P = .007). Short telomeres were predictive of a favorable prognosis, whereas long or unchanged telomeres were predictive of a poor outcome. For the first time to their knowledge, the authors have shown that, within the high‐risk group patients, telomere length could define a favorable subgroup that had a progression‐free survival (PFS) rate of 86% compared with a PFS rate of 36% for patients with more adverse disease, which is the expected PFS rate for such patients (P = .04). In a multivariate analysis, telomere length was the most significant prognostic parameter (P = .032). TA was correlated significantly with outcome and with known prognostic factors. High TA and low TA were associated with adverse and favorable outcomes, respectively (P = .01). CONCLUSION. The results of this investigation suggested that telomere length is a highly significant prognostic parameter of clinical relevance in patients with neuroblastoma. In high‐risk patients, telomere length was the sole significant parameter that identified a group of patients who had a favorable prognosis. The authors suggest that telomere length should be included in the recommended diagnostic investigations for patients with neuroblastoma. Cancer 2006. © 2006 American Cancer Society.

BACKGROUNDTumors in the Ewing family (EFTs) are the second most common bone tumors in children and adolescents. Despite aggressive chemotherapy, one‐third of patients with localized tumor still may develop recurrences. This implies that not all tumor cells are eradicated and that the patients may have a level of residual disease. EFTs are characterized by specific chromosomal translocations that result in chimeric transcripts that can be detected with reverse transcriptase‐polymerase chain reaction (RT‐PCR) analysis.METHODSThe authors report the prognostic potential of the positive chimeric transcript (EWS/FLI1) in bone marrow (BM) and/or peripheral blood (PBL) in 26 patients with EFT during a long follow‐up period (median, 61 months).RESULTSAt diagnosis, 43% of patients had positive RT‐PCR BM results, with no correlation to tumor progression (P = 0.3). During follow‐up, 58% of patients had positive RT‐PCR results in their last sample analyzed (BM and/or PBL). A highly significant correlation between the presence of the chimeric transcript and disease progression was detected (P = 0.0028). In a multivariate analysis, the percentage of tumor necrosis (P = 0.007) and RT‐PCR results during follow‐up (P = 0.02) remained significant prognostic markers. In 10 of 11 patients who developed disease progression, BM and/or PBL samples were positive for the chimeric transcript before evidence of overt clinical recurrence.CONCLUSIONSOccult tumor cells in BM and/or PBL samples during long follow‐up are strong predictors of recurrent disease in patients with nonmetastatic EFTs. Cancer 2004;100:1053–8. © 2004 American Cancer Society.