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Aya Oshiro

Publications and source records attributed to Aya Oshiro.

7 recordsLinked to original sources
PubMed2006

Prognostic significance of T-cell or cytotoxic molecules phenotype in classical Hodgkin's lymphoma: a clinicopathologic study.

PURPOSE: Classical Hodgkin's lymphoma (CHL) is characterized by Hodgkin's and Reed-Sternberg (H-RS) cells, most of which are derived from germinal-center B cells. Nevertheless, one or more markers for T cells and follicular dendritic cells (FDC) may be expressed in a minority of H-RS cells in some CHL patients, although the clinical significance of this remains controversial. The aim of this study was to clarify the association between phenotypic expression and clinical outcome in CHL. PATIENTS AND METHODS: Participants were 324 consecutive CHL patients, comprising 132 patients with nodular sclerosis (NS), 35 patients with NS grade 2 (NS2), and 157 patients with mixed cellularity (MC). We evaluated the presenting features and prognosis of patients on categorization into four phenotypically defined groups: B-cell (CD20+ and/or CD79a+; n = 63), T-cell and/or cytotoxic molecules (CD3+, CD4+, CD8+, CD45RO+, TIA-1+, and/or granzyme B+; n = 27), FDC (CD21+ without B-cell marker; n = 22), and null-cell types (n = 212). Other potential prognostic factors were examined. RESULTS: The T-cell and/or cytotoxic molecules group showed a significantly poorer prognosis than the other three groups (P < .0001). This finding was seen consistently in multivariate analyses. Morphologic subtyping (NS/NS2/MC) and Epstein-Barr virus positivity were not identified as independent prognostic factors. CONCLUSION: The presence of T-cell and/or cytotoxic antigens in H-RS cells may represent a poor prognostic factor in CHL, even if their expression is not regarded as lineage specific. Examination of T-cell and/or cytotoxic molecules phenotype in CHL patients is recommended as a routine pathologic practice.

Adolescent↗
PubMed2006

Identification of subtype-specific genomic alterations in aggressive adult T-cell leukemia/lymphoma.

Aggressive adult T-cell leukemia/lymphoma (ATLL) such as acute and lymphoma types are fatal diseases with poor prognosis. Although these 2 subtypes feature different clinicopathologic characteristics, no detailed comparative analyses of genomic/genetic alterations have been reported. We performed array-based comparative genomic hybridization for 17 acute and 49 lymphoma cases as well as real-time quantitative polymerase chain reaction (PCR) to identify the target genes of recurrently amplified regions. Comparison of the genome profiles of acute and lymphoma types revealed that the lymphoma type had significantly more frequent gains at 1q, 2p, 4q, 7p, and 7q, and losses of 10p, 13q, 16q, and 18p, whereas the acute type showed a gain of 3/3p. Of the recurrent high-level amplifications found at 1p36, 6p25, 7p22, 7q, and 14q32 in the lymphoma type, we were able to demonstrate that CARMA1 is a possible target gene of the 7p22 amplification for the lymphoma type but not for the acute type. Furthermore, we found BCL11B overexpression in the acute type regardless of the 14q32 gain/amplification, but no or low expression of the gene in the lymphoma type. These results suggest that acute and lymphoma types are genomically distinct subtypes, and thus may develop tumors via distinct genetic pathways.

Adult↗
PubMed2006

Senile Epstein-Barr virus-associated B-cell lymphoproliferative disorders: a mini review.

Epstein-Barr virus (EBV) is associated with a number of malignant lymphomas, including Burkitt lymphomas, Hodgkin lymphomas (HLS), immunodeficiency-associated lymphoproliferative disorders (LPDs), and subset of diffuse large B-cell lymphomas. We have recently identified a series of elderly patients afflicted with EBV-associated (EBV-positive) B-cell LPDs in the absence of predisposing immunodeficiencies ; we have named these neoplasms "senile" EBV+ B-cell LPDs. The large series of patients with this disease (n=76) provided additional evidence that this neoplasia, with a median age of onset of 71 years, has the highest incidence in elderly patients aged >50 years, suggesting that this disease may be related to the immunological deterioration that occurs during the aging process. These lesions were pathologically characterized by varying numbers of Hodgkin and Reed-Sternberg (HRS)-like giant cells, often posing a diagnostic problem differentiating this condition from HL. Recent studies, however, have indicated that HL and non-Hodgkin lymphoma (NHL) may be more closely related than previously implied, promoting the general consensus that HRS cells are derived from B cells in most HL cases. The relationship between EBV+ HL and EBV+ B-cell LPDs remains to be clarified. This review provides a unique opportunity to highlight the gray areas between EBV+ HL and EBV+ B-cell LPDs. Further investigations are necessary to clarify the interrelationship, including their overlapping morphological and biological features.

Aged↗
PubMed2003

[A case of primary malignant lymphoma of the duodenum successfully treated with dose escalating chemotherapy].

A 65-year-old woman with diabetes mellitus was hospitalized for heart failure and anemia in August 2001, and recovered with conservative treatment. An endoscopic examination revealed an ulcerative mass located in the duodenal bulb to the 2nd portion. Abdominal CT scan demonstrated tumor involvement in the pancreas head. The diagnosis of a diffuse large B-cell lymphoma, clinical stage IIE, was made by endoscopic biopsy. Although surgical resection of the localized intestinal tumor would have been a common choice for initial treatment, polychemotherapy was selected; the patient had diabetes mellitus and preferred polychemotherapy to surgical operation. Because of bulky intestinal mass, transmural disease and sensitive histological type, standard-dose chemotherapy was considered to include a high risk of intestinal perforation. We performed dose-escalating chemotherapy: A half dose of THP-COP (pirarubicin, cyclophosphamide, vincristine) was given at the start in October 2001, 60% THP-COP as the next cycle, 80% THP-COP as the 3rd cycle and thereafter. Without serious complications of the intestine, she received a total of 6 cycles of chemotherapy and subsequent involved field radiation. There has been no evidence of recurrence of disease 14 months from the start of chemotherapy. When conditions make surgical treatment difficult, dose-escalating chemotherapy in a treatment cycle may be considered as an alternative.

Aged↗