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2.
Transfus Med ; 18(3): 184-9, 2008 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-18598281

RESUMEN

The objective of this study was to identify haematological parameters useful in screening for iron deficiency among blood donors. Iron deficiency is a common complication of blood donation and often goes unrecognized until anaemia develops. Biochemical markers such as soluble transferrin receptor (TfR), ferritin and log(TfR/F) have been proposed as more valid indicators of body iron status. Red blood cell (RBC) parameters are, however, more easily measured and have also been proposed as indicators of iron depletion. We measured ferritin and TfR in 192 blood donors together with RBC analysis, performed on two haematology analysers. Thirteen donors had parameters suggestive of haemoglobinopathy and were excluded from further analysis. Overall, 10% (18/179) of the remaining donors had iron deficiency, as defined by log(TfR/F) exceeding the 95th percentile of the value in the population of first-time donors. Using receiver operating characteristic analysis, the sensitivity of ferritin was 100%, with a specificity of 90% at a cut-off of 15 mug L(-1). The sensitivity and specificity of RBC-Y at a cut-off of 152 for detecting iron deficiency were 81 and 89%, respectively. Haemoglobin content of reticulocytes, meanwhile, showed sensitivity of 69% and specificity of 93% when a cut-off of 28 pg was used. Both measures compare favourably with haemoglobin which only showed a sensitivity of 50%, although specificity was 91% at a cut-off value of 125 g L(-1). The parameter RBC-Y can be useful as a screening measure for iron deficiency in blood donors.


Asunto(s)
Anemia Ferropénica/diagnóstico , Donantes de Sangre , Índices de Eritrocitos , Ferritinas/sangre , Humanos , Tamizaje Masivo/métodos , Curva ROC , Receptores de Transferrina/análisis , Sensibilidad y Especificidad
3.
Singapore Med J ; 48(3): e74-6, 2007 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-17342275

RESUMEN

Chronic neutrophilic leukaemia is a rare myeloproliferative disease characterised by splenomegaly, sustained neutrophilia, raised vitamin B12 level and absence of the Philadelphia chromosome. We report a 74-year-old man who presented first with Sweet's syndrome and subsequently leukocytosis. He had splenomegaly, a raised vitamin B12 level, serum uric acid and neutrophil alkaline phosphatase score. Cytogenetic study of the marrow was normal and peripheral blood for BCR-ABL gene transcript was not detectable. He subsequently passed away with bronchopneumonia.


Asunto(s)
Leucemia Neutrofílica Crónica/diagnóstico , Anciano , Inhibidores de la Angiogénesis/uso terapéutico , Resultado Fatal , Humanos , Interferón-alfa/uso terapéutico , Leucemia Neutrofílica Crónica/sangre , Leucemia Neutrofílica Crónica/tratamiento farmacológico , Masculino , Reacción en Cadena de la Polimerasa
4.
Med J Malaysia ; 61(4): 416-21, 2006 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-17243518

RESUMEN

Diffuse large B-cell lymphoma (DLBCL) is a heterogenous entity. The pattern of CD15, CD30 and Bcl-2 expression is not well documented, especially in local population. We investigated 67 consecutive cases of DLBCL by immunohistochemistry on paraffin-embedded tissue. The male to female ratio was 1.2:1 with median age of 55 years, and more common nodal than extranodal in presentation. Only 3 of 67 cases expressed CD15. In addition, three cases showed weak membrane staining for CD30. Only one of these three cases was noted to have co-expression of CD15 and with occasional tumour cells showing weak CD30 expression. Bcl-2 protein was expressed in 43 of 67 (64%), more frequently in nodal than in extranodal tumours. In conclusion, CD15 and CD30 expressions are infrequent in DLBCL, and co-expression is rare. Bcl-2 protein expression is common in DLBCL.


Asunto(s)
Genes bcl-2/genética , Antígeno Ki-1/biosíntesis , Antígeno Lewis X/biosíntesis , Linfoma de Células B/genética , Linfoma de Células B Grandes Difuso/genética , Proteína X Asociada a bcl-2/biosíntesis , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Biomarcadores de Tumor/metabolismo , Niño , Femenino , Humanos , Inmunohistoquímica , Antígeno Ki-1/genética , Antígeno Lewis X/genética , Linfoma de Células B/metabolismo , Linfoma de Células B Grandes Difuso/metabolismo , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Proteína X Asociada a bcl-2/genética
5.
Med J Malaysia ; 59(1): 100-2, 2004 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-15535343

RESUMEN

Familial hemophagocytic lymphohistiocytosis is a disorder which presents with fever, pancytopenia, liver dysfunction and also an increase in non-malignant histiocytes with prominent hemophagocytosis in various organs. It is usually difficult to distinguish from other hemophagocytic syndrome in the absence of family history. It rarely manifests in adults. Chemotherapy is usually indicated. Here, we report the occurrence of this disorder in two brothers in their twenties.


Asunto(s)
Histiocitosis de Células no Langerhans/diagnóstico , Histiocitosis de Células no Langerhans/genética , Adulto , Diagnóstico Diferencial , Histiocitosis de Células no Langerhans/tratamiento farmacológico , Humanos , Masculino
6.
Malays J Pathol ; 24(1): 1-8, 2002 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-16329549

RESUMEN

Allogeneic bone marrow or peripheral blood stem cell transplantation traditionally uses myeloablative regimen for conditioning to enable grafting of donor's stem cells. Animal experiments have shown that a milder non-myeloablative conditioning regimen does allow engraftment to occur. Nonmyeloablative conditioning regimens are low-intensity immunosuppressive treatment given to the recipient before infusion of donor's stem cells. It was reported to have decreased immediate procedural mortality, in particular those secondary to acute graft versus host reaction. However, it did give rise to higher risks of graft rejection, tumour tolerance and disease progression. Fortunately, appropriately administered donor lymphocyte infusion has been shown to establish full donor chimerism (complete donor stem cell grafting in the recipient's bone marrow) and potentiate antitumour effect (graft versus tumour reaction). The reduction of immediate transplant mortality allows the procedure to be carried out in older age groups, patients with concomitant diseases that otherwise would have made the patients unfit for the procedure, patients with non-malignant disorders such as congenital immune deficiencies, autoimmune disorders or thalassaemia majors. The regimen also allows transplantation of genetically manipulated haemopoietic stem cells (gene thrapy) to be carried out more readily in the immediate future. Lastly, the regimen may serve as a platform for immunotherapy using specific T cell clones for anti-tumour therapy with or without the knowledge of known tumour antigen.


Asunto(s)
Trasplante de Células Madre Hematopoyéticas , Inmunoterapia , Agonistas Mieloablativos/farmacología , Acondicionamiento Pretrasplante/métodos , Animales , Modelos Animales de Enfermedad , Enfermedad Injerto contra Huésped/prevención & control , Humanos
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