PMID- 10414507 OWN - NLM STAT- MEDLINE DCOM- 19990803 LR - 20190722 IS - 0046-8177 (Print) IS - 0046-8177 (Linking) VI - 30 IP - 7 DP - 1999 Jul TI - The role of trisomy 8 in the pathogenesis of chronic eosinophilic leukemia. PG - 864-8 AB - A case of chronic eosinophilic leukemia (CEL) manifesting as spinal cord compression by an extradural eosinophilic chloroma in a 32-year-old Chinese man was presented, who subsequently developed extramedullary transformation at the skin and then peritoneal cavity. Cytogenetic study of bone marrow cells at diagnosis showed a clonal karyotypic abnormality of trisomy 8 (+8), which on fluorescence in situ hybridization (FISH) was shown to be present in a clone of abnormal eosinophils, hence showing the neoplastic nature of the eosinophilic proliferation. There was another population of abnormal eosinophils that did not show +8. At blastic transformation, all blast cells in ascitic fluid were shown by FISH to harbor +8. These findings suggest that +8 in this case may have arisen from clonal evolution and is not the primary genetic event in leukemogenesis, but +8 most probably imparts a further survival advantage to the clone responsible for subsequent blastic transformation. FAU - Ma, S K AU - Ma SK AD - Department of Pathology, The University of Hong Kong, Queen Mary Hospital, Hong Kong. FAU - Kwong, Y L AU - Kwong YL FAU - Shek, T W AU - Shek TW FAU - Wan, T S AU - Wan TS FAU - Chow, E Y AU - Chow EY FAU - Chan, J C AU - Chan JC FAU - Chan, L C AU - Chan LC LA - eng PT - Case Reports PT - Journal Article PL - United States TA - Hum Pathol JT - Human pathology JID - 9421547 RN - 0 (Biomarkers, Tumor) SB - IM MH - Adult MH - Ascites/genetics/pathology MH - Biomarkers, Tumor/metabolism MH - *Chromosomes, Human, Pair 8 MH - Chronic Disease MH - Humans MH - Hypereosinophilic Syndrome/diagnostic imaging/*genetics/metabolism MH - Immunohistochemistry MH - In Situ Hybridization, Fluorescence MH - Male MH - Peritoneal Diseases/metabolism/pathology MH - Skin Diseases/metabolism/pathology MH - Tomography, X-Ray Computed MH - *Trisomy EDAT- 1999/07/22 00:00 MHDA- 1999/07/22 00:01 CRDT- 1999/07/22 00:00 PHST- 1999/07/22 00:00 [pubmed] PHST- 1999/07/22 00:01 [medline] PHST- 1999/07/22 00:00 [entrez] AID - S0046-8177(99)90149-1 [pii] AID - 10.1016/s0046-8177(99)90149-1 [doi] PST - ppublish SO - Hum Pathol. 1999 Jul;30(7):864-8. doi: 10.1016/s0046-8177(99)90149-1.