De Novo Pure Trisomy 20p: Report of a Novel Case of a Marker Chromosome and Literature Review

No abstract available.

Desensitization in HLA Incompatible Transplantation / 대한수혈학회지

In terminally ill patients, organ transplantation could be recommended as the treatment of choice. In Korea, living donor liver or kidney transplantation is much more frequent than deceased donor transplantation due to organ shortages from deceased donors. ABO or HLA incompatibility in transplantation can be a major barrier in living donor transplantation. Currently, the rate of ABO incompatible organ transplantation accompanied by desensitization is 20~25% of living donor transplantation, and the blood bank laboratory plays an active role by plasmapheresis. The desensitization of HLA incompatible transplantation in highly sensitized patients is more difficult than that of ABO incompatible transplantation. The HLA antibody is not easy to remove and it is difficult to prevent sensitization. In addition, setting the target treatment goals and predicting the treatment outcomes based on the HLA antibody results are problematic. Therefore, a range of desensitization protocols have been attempted and various therapeutic goals have been introduced. This article reviews the various desensitization methods for antibody removal focusing on HLA incompatible kidney transplantation, and discusses the prognosis of desensitization methods for antibody removal based on the literature.

Diagnostic Performance and Comparative Evaluation of the Architect, Liaison, and Platelia Epstein-Barr Virus Antibody Assays

BACKGROUND: Epstein-Barr Virus (EBV) is one of the most prevalent causes of viral infection in humans. EBV infection stage (acute, past, or absent infection) is typically determined using a combination of assays that detect EBV-specific markers, such as IgG and IgM antibodies against the EBV viral capsid antigen (VCA) and IgG antibodies against the EBV nuclear antigen (EBNA). We compared the diagnostic performance and agreement of results between three commercial EBV antibody assays using an EBV performance panel (SeraCare Life Science, Milford, MA, USA) as a reference. METHODS: EBV antibody tests of EBV VCA IgM, VCA IgG, and EBNA IgG antibodies were performed by the Architect (Abbott Diagnostics, Wiesbaden, Germany), Liaison (DiaSorin, Saluggia, Italy), and Platelia (Bio-Rad, Marnes-la-Coquette, France) assays. Agreement between the three assays was evaluated using 279 clinical samples, and EBV DNA and antibody test results were compared. RESULTS: The three EBV antibody assays showed good diagnostic performance with good and excellent agreement with the performance panel (kappa coefficient, >0.6). The overall VCA IgM positivity rate was higher in EBV DNA-positive samples than in EBV DNA-negative samples for all three EBV antibody assays (P=0.02). The three EBV antibody assays exhibited good agreement in results for the clinical samples. CONCLUSIONS: The diagnostic performance of the three EBV antibody assays was acceptable, and they showed comparable agreement in results for the clinical samples.

Bone Marrow Involvement of Epstein-Barr Virus-Positive Large B-Cell Lymphoma in a Patient with Angioimmunoblastic T-Cell Lymphoma

No abstract available.

Two Cases of Antibody-Mediated Rejection Following Kidney Transplantation due to HLA-DQB1 Allele-Specific and DQ Alpha Protein-Specific HLA Antibodies

No abstract available.

Loss of Mismatched HLA Detected in the Peripheral Blood of an AML Patient who Relapsed After Haploidentical Hematopoietic Stem Cell Transplantation

No abstract available.

Long-Term Stability of Selected Serum Biomarkers in Leftover Samples / 임상검사와정도관리

BACKGROUND: The purpose of this study was to assess the quality of long-term-stored leftover blood samples, and to evaluate the long-term stability of selected serum biomarkers such as proteins, enzymes, electrolytes, and tumour markers. METHODS: Stored blood samples were transferred to our biobank after being used to conduct tests for routine medical examinations in one health care institution, and were preserved at or below -70degrees C for 4 years. We analysed 24 biomarkers whose levels had been reported 4 years ago and tested them using the same analyser, reagents, and methods by utilizing an ADVIA Centaur Immunoassay System (Siemens Healthcare Diagnostics, USA) or an ADVIA 2400 Chemistry System (Siemens, USA). RESULTS: A total of 15 out of the 24 tested biomarkers showed significant differences in paired Student t-tests (P0.975). Two biomarkers, creatinine and rheumatoid arthritis factor, showed no significant differences but were poorly correlated with previously analysed data. Aspartate aminotransferase, alanine aminotransferase, hepatitis B virus (HBV) surface antigen, and insulin levels were discordant according to their reference ranges. A total of 3 biomarkers, C-reactive protein, cancer antigen 125, and HBV surface antibody, showed no significant differences and good correlations without discordant data. CONCLUSIONS: Our findings showed that long-term storage for more than 4 years can result in a considerable bias for variable biomarkers. Only 3 of the 24 biomarkers evaluated were found to be stable biomarkers. Long-term storage of leftover samples is not recommended for most chemical analyses.

Erythroleukemia Relapsing as Precursor B-cell Lymphoblastic Leukemia / 대한진단검사의학회지

AML relapsing as ALL has rarely been reported. We describe the case of a 62-yr-old man who was diagnosed with erythroleukemia with a complex karyotype and achieved complete hematologic and cytogenetic remission after induction chemotherapy. However, 4 months after the initial diagnosis, he showed relapse with blasts showing a different morphology and immunophenotype and was diagnosed with precursor B-cell ALL. The relapsing precursor B-cell ALL presented with the same leukemic clones as the primary erythroleukemia. Cytogenetic analysis of his bone marrow (BM) at the time of the primary erythroleukemia showed complex karyotypic abnormalities, including monosomy 5 and monosomy 7. At relapse, his BM showed reemergence of these leukemic clones of complex karyotypic abnormalities with clonal switch. To our knowledge, this is the first case of a lineage switch from erythroleukemia to ALL.

A Case of Hemochromatosis Successfully Treated by 'Double Red Blood Cell' Phlebotomy / 대한수혈학회지

Hemochromatosis is a disorder of the iron metabolism leading to organ damage, such as skin pigmentation, liver cirrhosis, heart failure and diabetes, due to progressive tissue iron overload. Phlebotomy is currently the standard therapy for hemochromatosis, which prevents the progression of tissue damage. We report a case of hemochromatosis treated successfully by 'double red blood cell' phlebotomy using ALYX (Fenwal, DeerWeld, USA). A 60-year-old man presented with skin pigmentation around the armpit and an increase in the AST and ALT levels. Upon admission, the ferritin (1,443 ng/mL), AST (199 IU/L) and ALT (452 IU/L) were elevated. A liver biopsy revealed iron deposition in Kupffer cells and portal tracts. Four sessions of double red blood cell phlebotomies were performed for 3 months. The ferritin, AST and ALT levels decreased to 33 ng/mL, 105 IU/L and 188 IU/L, respectively. The patient had no adverse effects during treatment. This is the first report of the successful treatment of hemochromatosis by 'double red blood cell' phlebotomy in Korea.

Appropriate Condition of Germ Tube Formation as Presumptive Identification Test for Candida albicans / 대한의진균학회지

BACKGROUND: Candida albicans is the most prevalent species found in human yeast infections. The germ tube test is still frequently used for its rapid presumptive identification. Recently Candida dubliniensis as well as C. albicans has been reported to form germ tubes. OBJECTIVE: The purpose of this study was to evaluate the germ tube test at various conditions for rapid presumptive identification of C. albicans. METHODS: C. albicans ATCC 14053, C. albicans ATCC 18804, C. dubliniensis ATCC MYA 646, and C. dubliniensis KCTC 17427 were tested. Human pooled serum (HPS), HBV, HCV infected patient serum, fetal bovine serum (FBS) and rabbit serum (RS) were used for germ tube test. The germ tube formation was evaluated at different keeping condition of various sera, after mixing with 5 different bacterial suspensions and at various incubation conditions. RESULTS: The germ tube formation of C. albicans was more in the RS or FBS than in the HPS. For the various sera fresh sample was always the best expression of germ-tube forming ability. In the HCV infected patient serum and mixing with Pseudomonas aeruginosa germ tube formation was suppressed. C. dubliniensis did not form germ tube in the HPS, only formed in the FBS or RS. CONCLUSION: For rapid presumptive identification of C. albicans not C. dubliniensis the best selection of serum is the fresh HPS. We recommend the examination with isolated colony free from bacteria after incubation for 2 to 3 hours.

Nasal Carriage of Methicillin-Resistant Staphylococcus aureus among Healthcare Workers and Community Students in 1997 and 2006 / 병원감염관리

BACKGROUND: The anterior nares of the nose is the most frequent carriage site for Staphylococcus aureus. Methicillin-resistant S. aureus (MRSA) is the most significant nosocomial pathogen. METHODS: The prevalence of nasal carriage of S. aureus, antibiograms and prevalence of MRSA were studied among healthy students (HSs) and healthcare workers (HCWs) in 1997 and 2006. RESULTS: S. aureus was isolated from 11.8% of HSs and 19.3% of HCWs in 1997, and the respective figures in 2006 were 30% and 42.2%. S. aureus nasal carriage rates among HSs and HCWs in 2006 were higher than those in 1997 (P<0.05). The methicillin resistant rates of S. aureus, respectively, were 0% (0/6) and 27.3% (3/11) in 1997, 5.6% (1/18) and 44% (11/25) in 2006. Methicillin resistant rates of S. aureus among HCWs were higher in 2007 than in 1996, but those of community students in 1997 and 2006 were not significantly different from each other (P<0.05). CONCLUSION: The nasal carriage rate of MRSA has significantly increased in HCWs compared to that in the community; thus, MRSA nasal carriage rate should be controlled and kept under constant surveillance.

Nasal Carriage of Methicillin-Resistant Staphylococcus aureus among Healthcare Workers and Community Students in 1997 and 2006 / 병원감염관리

BACKGROUND: The anterior nares of the nose is the most frequent carriage site for Staphylococcus aureus. Methicillin-resistant S. aureus (MRSA) is the most significant nosocomial pathogen. METHODS: The prevalence of nasal carriage of S. aureus, antibiograms and prevalence of MRSA were studied among healthy students (HSs) and healthcare workers (HCWs) in 1997 and 2006. RESULTS: S. aureus was isolated from 11.8% of HSs and 19.3% of HCWs in 1997, and the respective figures in 2006 were 30% and 42.2%. S. aureus nasal carriage rates among HSs and HCWs in 2006 were higher than those in 1997 (P<0.05). The methicillin resistant rates of S. aureus, respectively, were 0% (0/6) and 27.3% (3/11) in 1997, 5.6% (1/18) and 44% (11/25) in 2006. Methicillin resistant rates of S. aureus among HCWs were higher in 2007 than in 1996, but those of community students in 1997 and 2006 were not significantly different from each other (P<0.05). CONCLUSION: The nasal carriage rate of MRSA has significantly increased in HCWs compared to that in the community; thus, MRSA nasal carriage rate should be controlled and kept under constant surveillance.