PMID- 28123540 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20201001 IS - 1792-1074 (Print) IS - 1792-1082 (Electronic) IS - 1792-1074 (Linking) VI - 13 IP - 1 DP - 2017 Jan TI - Sometimes it is better to wait: First Italian case of a newborn with transient abnormal myelopoiesis and a favorable prognosis. PG - 191-195 LID - 10.3892/ol.2016.5401 [doi] AB - Congenital leukemia is rare disease with an incidence of one to five cases per million births. Transient abnormal myelopoiesis (TAM), also called transient myeloproliferative disorder, is a pre-leukemia disorder that may occur in Down syndrome (DS) or non-DS infants. TAM may enter spontaneous remission; however, continual monitoring is required, as this disorder has been observed to develop into acute megakaryoblastic leukemia in 16-30% of cases. In the literature, 16 cases of TAM in non-DS infants have been reported. The case presented in the current study is, to the best of our knowledge, the first case of an Italian non-DS newborn presenting with clinical manifestations of acute leukemia at five days after birth, exhibiting a normal karyotype, trisomy 21 only in blast cells, and spontaneous remission. Chromosomal analyses on peripheral blood cells, bone marrow cells and dermal fibroblasts were conducted using a G-banding technique, and fluorescence in situ hybridization (FISH) was used to identify the critical regions of DS. Amplification of GATA binding protein 1 (GATA1) exon 2 genomic DNA was performed using polymerase chain reaction. Cytogenetic analysis of 50 peripheral blood cells and dermal fibroblasts from the patient revealed a normal karyotype: 46, XX. Conversely, cytogenetic analysis of the patient's bone marrow revealed an abnormal karyotype 47, XX+21. In order to investigate this result, FISH was performed, which identified the presence of three signals in 70% of the cells and two signals in 30% of bone marrow cells. GATA1 sequencing revealed the substitution of a single base (c.150delG) in exon 2. Seven months after the initial analysis, FISH and cytogenetic analyses of the stimulated/unstimulated peripheral blood cells and bone marrow cells were performed, revealing that each exhibited diploid signals, as observed in a normal karyotype. FAU - Salvatori, Guglielmo AU - Salvatori G AD - Department of Neonatology, Bambino Gesu Children's Hospital, I-00165 Rome, Italy. FAU - Foligno, Silvia AU - Foligno S AD - Department of Neonatology, Bambino Gesu Children's Hospital, I-00165 Rome, Italy. FAU - Sirleto, Pietro AU - Sirleto P AD - Department of Genetic Laboratories, Bambino Gesu Children's Hospital, I-00165 Rome, Italy. FAU - Genovese, Silvia AU - Genovese S AD - Department of Genetic Laboratories, Bambino Gesu Children's Hospital, I-00165 Rome, Italy. FAU - Russo, Serena AU - Russo S AD - Department of Genetic Laboratories, Bambino Gesu Children's Hospital, I-00165 Rome, Italy. FAU - Coletti, Valentina AU - Coletti V AD - Department of Hematology, Bambino Gesu Children's Hospital, I-00165 Rome, Italy. FAU - Dotta, Andrea AU - Dotta A AD - Department of Neonatology, Bambino Gesu Children's Hospital, I-00165 Rome, Italy. FAU - Luciani, Matteo AU - Luciani M AD - Department of Hematology, Bambino Gesu Children's Hospital, I-00165 Rome, Italy. LA - eng PT - Journal Article DEP - 20161121 PL - Greece TA - Oncol Lett JT - Oncology letters JID - 101531236 PMC - PMC5244853 OTO - NOTNLM OT - Down syndrome OT - acute megakaryoblastic leukemia OT - transient abnormal myelopoiesis OT - transient myeloproliferative disorder EDAT- 2017/01/27 06:00 MHDA- 2017/01/27 06:01 PMCR- 2016/11/21 CRDT- 2017/01/27 06:00 PHST- 2015/12/09 00:00 [received] PHST- 2016/07/21 00:00 [accepted] PHST- 2017/01/27 06:00 [entrez] PHST- 2017/01/27 06:00 [pubmed] PHST- 2017/01/27 06:01 [medline] PHST- 2016/11/21 00:00 [pmc-release] AID - OL-0-0-5401 [pii] AID - 10.3892/ol.2016.5401 [doi] PST - ppublish SO - Oncol Lett. 2017 Jan;13(1):191-195. doi: 10.3892/ol.2016.5401. Epub 2016 Nov 21.