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©Ferrata Storti Foundation Haematologica 2000; 85:1207-1210 Acute Leukemias case of the month Cytogenetic characterization of acute myeloid leukemia in Shwachman's syndrome. A case report FRANCESCA R. SPIRITO, BARBARA CRESCENZI, CATERINA MATTEUCCI, MASSIMO F. MARTELLI, CRISTINA MECUCCI Hematology and Bone Marrow Transplantation Unit, University of Perugia, Italy ABSTRACT We report on a case of acute myeloid leukemia in a tion. A recent analysis of 21 patients with SDS 17-year old boy affected by Shwachman Diamond showed that the incidence of myelodysplasia syndrome (SDS). Conventional cytogenetics at diag- and transformation to acute myeloid leukemia nosis revealed an abnormal clone with complex 4 karyotypic changes including typical myeloid aber- is 33% and 24%, respectively. A few cases of rations, such as monosomy 5, tetrasomy of chro- acute lymphoblastic leukemia have also been 5-7 mosome 8, trisomy 9, and deletion of the short arm described as well as one case of a juvenile form of chromosome 12. The boy was treated with con- of chronic myeloid leukemia.8 When leukemia ventional chemotherapy and reached complete develops, due to the preceding bone marrow remission of leukemia, confirmed by cytogenetics failure, serious complications may be induced and fluorescence in situ hybridization. Nevertheless by chemotherapy and, because of the underly- he failed to regenerate normal marrow cellularity ing organ dysfunctions, these patients should and blood cell count. Cytogenetic information on be managed with extreme caution when treat- hematologic malignancies in SDS patients are dis- cussed. ed with allogeneic bone marrow transplanta- 9-13 ©2000; Ferrata Storti Foundation tion. We describe here the cytogenetic char- acterization and clinical course of an acute Key words: Shwachman’s syndrome, leukemia, cytogenetics myeloid leukemia occurring in a young patient affected by Shwachman's syndrome. Case report hwachman-Diamond syndrome (SDS) is a The patient was investigated for failure to rare autosomal recessive disorder charac- thrive in early childhood. Diagnosis of SDS was Sterized by exocrine pancreatic insufficiency, made at the age of thirteen months and he was somatic abnormalities (particularly metaphy- treated with pancreatic supplements. Recurrent seal dysostosis), and bone marrow dysfunction. infections were not noted from the past history. It was first described in 1964 by Shwachman et In 1993, when he was 14 years old, a mild pan- al.1 and is now recognized as the second most cytopenia was evidenced: WBC 3.9×109/L, PMN frequent cause of pancreatic insufficiency in 1.2×109/L, Hb 118 g/L, Plts 127×109/L. Neu- children. Hematologic abnormalities consist of trophil chemotaxis was within the normal range, constant or intermittent neutropenia, associat- HbF was just above normal range (2.8% of total ed in 50% of cases with megaloblastic anemia hemoglobin). At that time radiography showed and in 70% of cases with thrombocytopenia. growth retardation, metaphyseal chondropla- Furthermore, raised values of fetal hemoglobin sia, and short stature. In June 1997, when he (HbF) and impaired chemotaxis have been 2 was 17 years old, he was diagnosed as having an described. The bone marrow can be normo- or acute myeloid leukemia, M2 according to the hypo-cellular. Sometimes the syndrome is char- FAB classification. Blood cell count was as fol- acterized by remarkable vacuolization of ery- lows: Hb 8.4 g/dL, WBC 1.4×109/L, with 8% throid and myeloid precursors, hemosiderosis, × 9 3 myeloid blasts, Plts 9 10 /L. Marrow aspirate and ringed sideroblasts. SDS can therefore be showed high cellularity with massive infiltration considered as a constitutional marrow failure by blast cells with a high nucleus/cytoplasmic syndrome. Patients have an increased frequen- ratio and a basophilic hypergranulated cyto- cy of myelodysplasia and leukemic transforma- plasm, an irregularly shaped nucleus with homo- geneous chromatin, and rare nucleoli. Marrow Correspondence: Cristina Mecucci, M.D., Hematology and Bone Marrow blast cells were Sudan black and naphthol ASD Transplantation Unit, University of Perugia, Policlinico Monteluce, 06123 acetate esterase positive. The blast population Perugia, Italy. Phone: international +39-075-5783808 – Fax: international +39-075 5783691 - E-mail: [email protected] displayed the following immunophenotype: Haematologica vol. 85(11):November 2000 1208 F.R. Spirito et al. CD13 85%, CD33 94%, CD34 14%, CD11b 81%, he was still pancytopenic and in a poor general CD14 61%, CD2 24%, CD3 19%, CD20 neg, condition while the bone marrow remained mor- CD22 neg, CD7 50%. A bone marrow sample phologically and histologically free of leukemia. was processed for cytogenetic analysis after 24h He refused further consolidation chemotherapy. cultures. Chromosomes were G banded using In March 1998 he developed a progressive ane- Wright's stain. A complex karyotype was found mia which required red cell transfusions. In Sep- in 12 out of 15 metaphases: 49-52, XY, +X, -5, tember 1998 severe thrombocytopenia +8, +8, +9, del(12p), -13, +mar1-4 (cp12) (Fig- (<7×109/L) was also noticed. A marrow aspirate ure 1). The constitutional karyotype on PHA- in December 1998 showed absence of blasts and stimulated peripheral blood cultures was 46,XY. only disomic nuclei with a centromeric FISH Treatment was started according to the ongoing probe for chromosome 8. At the last follow-up, protocol for acute myeloid leukemia: LANL 93, in September 1999, the patient was in a good GIMEMA random 2 (mitoxanthrone + aracytin + clinical condition. His blood cell count was: etoposide). The period of aplasia was charac- WBC 3.5×109/L (neutrophils= 57%), Hb 101 terized by numerous complications, including g/L, Plts 35×109/L. persistent fever despite empiric antibacterial and antifungal therapy, respiratory insufficiency, Discussion impaired kidney function, hematemesis, and The primary defect responsible for SDS is melena. Marrow recovery was extremely slow. unknown. A spectrum of clinical abnormalities The patient was considered in remission 51 days has been described, including metaphyseal after the beginning of chemotherapy, in the pres- dysostosis, epiphyseal dysplasia, immune dys- ence of peripheral cytopenia and hypocellular function, liver disease, growth failure, renal bone marrow without evidence of blast cells. tubular defects, insulin-dependent diabetes mel- Conventional cytogenetics at that time showed a litus, and psychomotor retardation. Bone mar- normal karyotype and fluorescence in situ row dysfunction and pancreatic insufficiency, hybridization (FISH) with a biotin-labeled cen- however, are constant. Speculations about an in tromeric alpha-satellite probe for chromosome 8 utero insult during development of both bone (D8Z1,Oncor, Gaithersburg, MD, USA) only marrow and pancreas at around the 5th month showed disomic nuclei. On day +66 the boy was of pregnancy have been put forward.14 Similar- admitted to undergo a course of chemotherapy ly to other congenital bone marrow disorders, with aracytin and idarubicin. Two months later such as Fanconi’s anemia, SDS is an interesting Figure 1. G-banded bone marrow karyotype at time of diagnosis of acute myeloid leukemia. Haematologica vol. 85(11):November 2000 AML in Shwachman’s syndrome 1209 Table 1. Cytogenetic abnormalities reported in patients with Shwachman-Diamond syndrome and hematologic malignancies. Patient Hematologic Age*/sex Preceeding Karyotype Treatment/ Survival Ref. n. Diagnosis (years) MDS response > 1 year 1 AML-M6 42/M + 46,XY,der(20)(q11) n.r./- n.r. 4 2 AML-M5 5/M + 47,XY,der(7)t(4;7)(q31,q11),+21 Allo-BMT/+ + 4 3 MDS 4/M 46XY, i(7q) n.r. n.r. 4 4 MDS 11/F 46,XX,der(7)(q11.2q32)(not clonal) Allo-BMT/+ n.r. 4 5 AML-M5 11/M + 47,XY,+1, del(9)(q22) n.r./- n.r. 4 6 AML-M2 8/M + 46,XY,add(11p),-15,-22,+mar1,+mar2 n.r/- n.r 4 7 LAL-L1 1.9/M - 53,XY,+G,+G Vcr+Pdn+L-Asp/+ + 6 8 AML 9/M + 45,XY,-7,der(18) Adria+Ara-C/- - 6 9 AML-M4 24/F + 46,XX,inv(9)(?) Allo-BMT/+ - 9 10 MDS 8/M 45,XY,-7 Allo-BMT/n.e - 10 11 MDS 9/M 46,XY,i(7q) allo-BMT/n.e - 10 12 AML-M6 43/M + 46,XY,del(20q)/46,XY,-2,-4,del(5q),del(7q),+mar+ring Dauno+Ara-C+6-TG -13 13 HYPOPLASIA 6.5/M - 46,XY,i(7)(q10) No n.r 17 14 MDS 5/M 46,XY,i(7q),del(20)(q11) No n.r. 17 15 MDS 7/M 46,XY,i(7)(q10) No + 18 16 MDS 7/M 46,XY,del(7)(q22-34) n.r. n.r. 19 17 MDS 1.4/F 45,XX,t(6;13)(q21;q31),-7 n.r. n.r. 19 18 AML-M4 38/M + 45-50,XY,-18,t(21;?)(q22;?),dic(22;?)(p11?) Allo-BMT/+ n.r. 22 19 AML-M2 17/M – 49-52,XY,+X,-5,+8,+8+9,del(12p),-13,+markers Mitox+Ara-C+VP-16/+ + Present case AML=acute myeloid leukemia; ALL=acute lymphoblastic leukemia; MDS=myelodysplastic syndrome; BMT= bone marrow transplantation; n.r.=not reported; n.e.=not evaluable. *Age at time of diagnosis of AL or MDS with karyotypic results. in vivo model of leukemic transformation. The blasts did, however, show complex changes typ- molecular pathogenesis of bone marrow dys- ically found in MDS/AML, such as monosomy 5, function and leukemia evolution is unknown. tetrasomy 8, trisomy 9, and del(12p). Mono- One case of an eighteen-month old girl with a de somy 5 and deletion of 12p, which are frequently novo constitutional t(6;12)(q16.2;q21.2) was found in secondary AML/MDS, could have orig- described, suggesting that either the 6q16.2 or inated from specific toxic insults to the bone 12q21.2 region may contain critical genes for marrow stem cell.
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