Результаты поиска

[Human immunodeficiency virus and lymphoma].

Lymphomas remain a leading cause of morbidity and mortality for HIV-positive patients. The most common lymphomas include diffuse large B-cell lymphoma, Burkitt lymphoma, primary effusion lymphoma, plasmablastic lymphoma and Hodgkin lymphoma. Appropriate approach is determined by lymphoma stage, performans status, comorbidities, histological subtype, status of the HIV disease and immunosuppression. Treatment outcomes have improved due to chemotherapy modalities and effective antiretroviral therapy. This review summarizes epidemiology, pathogenesis, pathology, and current treatment landscape in …

Diagnostic challenges posed by the wide morphological and immunophenotypic spectrum of plasma cell neoplasms.

Plasma cell neoplasms (PCNs) are a group of malignant neoplasms originating from the monoclonal expansion of immunoglobulin-secreting, termi … lastic and pleomorphic/anaplastic variants are prone to present as extramedullary lesions mimicking plasmablastic lymphoma (PBL) or various types of lymphomas with pleomorphic/anaplastic morphology. Moreover, neoplastic PCs may exhibit aberrant expression of CD3, CD4, CD117, and cyclin D1, leading to potential diagnostic pitfalls. Diffuse CD30 expression with anaplastic …

Lymphomas occurring specifically in HIV-infected patients: from pathogenesis to pathology.

Lymphomas that develop in HIV positive patients are predominantly aggressive B-cell malignancies. The most common HIV-associated lymphomas are Burkitt lymphoma (BL) and diffuse large B-cell lymphoma (DLBCL). Lymphomas that occur specifically in HIV positive patients include primary effusion lymphoma (PEL) and its solid variants, plasmablastic lymphoma of the oral cavity type and lymphoma associated with Kaposi sarcoma herpesvirus (KSHV)-related multicentric Castleman disease. These lymphomas, together with BL and immunoblastic lymphoma subtypes with plasmacytoid differentiation, carry Epstein-…

From Chronic Lymphocytic Leukemia to Plasmablastic Myeloma: Beyond the Usual Richter Transformation.

BACKGROUND: Richter transformation (RT) is defined as the histologic transformation of Chronic Lymphocytic Leukemia (CLL) to either diffuse large B-cell lymphoma or Hodgkin lymphoma. Transformation into lymphoproliferative neoplasms with plasmablastic differentiation is exceptionally rare and poorly characterized. CASE PRESENTATION: We present the first case of a patient with CLL evolving into plasmablastic myeloma (PBM). A 62-year-old man with previously treated CLL developed thrombocytopenia and rapidly progressive acute kidney injury. Serum electrophoresis showed new IgA-λ protein (2.2 g/L

B-cell Non-Hodgkin Lymphomas with Plasmacytic Differentiation.

B-cell non-Hodgkin lymphomas with plasmacytic differentiation are a diverse group of entities with extremely variable morphologic features. Diagnostic challenges can arise in differentiating lymphoplasmacytic lymphoma from marginal zone lymphoma and other low-grade B-cell lymphomas. In addition, plasmablastic lymphomas can be difficult to distinguish from diffuse large B-cell lymphoma or other high-grade lymphomas. Judicious use of immunohistochemical studies and molecular testing can assist in appropriate classification.

Редкий случай плазмабластической миеломы с двойным Каппой и Lambda mRNA экспрессией, представляющий себя как одинокая тяжёлая опухоль.

Плазмабластическая миелома является агрессивным вариантом миэломы плазменных клеток, которая может имитировать плазмобластную лимфому, когда она представляет собой одиночную массу. Двойное выражение каппы и лямбды светоцепной цепи является исключительно редким и может быть упущено, если оценка основывается только на обнаружении уровня протеина. Мы сообщаем о случае с женщиной в 80 лет, которая подавала опухоль с левым опухолью и перерезала одинокий опухоль и опухоль. Гистология показала, что листы больших плазмбластических клеток являются положительными для CD38, CD138, множественной миэломы о

Совпадение в аннотации оригинала
Plasmablastic myeloma is an aggressive variant of plasma cell myeloma that can mimic plasmablastic lymphoma when it presents as a solitary mass. Dual kappa and lambda light-chain expression is exceptionally rare and may be missed if evaluation relies on protein-level detection alone. We report the case of a woman in her 80s who presented with left hard palat…

Simple karyotype and bcl-6 expression predict a diagnosis of Burkitt lymphoma and better survival in IG-MYC rearranged high-grade B-cell lymphomas.

Rearrangement of MYC with immunoglobulin genes is a hallmark of Burkitt lymphoma. However, this rearrangement is not entirely specific and i … h features intermediate between diffuse large B-cell lymphoma and Burkitt lymphoma (six cases), and plasmablastic lymphoma (three cases). Additional cytogenetic abnormalities were observed in 26 of 34 cases (76%), including four cases (12%) that harbored dual translocations involving BCL-2 or BCl-6. Burkitt lymphoma cases had a significantly lower number of additional a …

Extranodal malignant lymphoma of the upper aerodigestive tract: prevalence of Epstien-Barr virus (EBV) infection in King Chulalongkorn Memorial Hospital.

BACKGROUND: High frequency of Epstein-Barr virus (EBV) in the normal mucosa of the upper aerodigestive tract suggests that it may serve as a … (23.81%) expressed EBER transcripts and were extranodal NK/T-cell lymphomas, nasal type (7 cases), plasmablastic lymphomas (2 cases) and diffuse large B-cell lymphoma (1 case). Three of 4 cases (75%) of known HIV-seropositive cases were EBV-positive (2 plasmablastic lymphomas and 1 diffuse large B-cell lymphoma). CONCLUSION: In the upper aerodigestive tract, EBV was p …

CD3-positive plasmablastic B-cell neoplasms: a diagnostic pitfall.

Rare B-cell neoplasms with plasmablastic differentiation may aberrantly express CD3 by immunohistochemical staining, which places a great challenge for diagnosis. We here studied 17 cases of CD3+ plasmablastic B-cell neoplasms, including 12 plasmablastic lymphomas and 5 plasmablastic plasma cell myelomas. All 17 cases occurred in the extranodal sites with a male predominance (13/17). Four cases were initially misinterpreted by outside institutions, among which three were diagnosed as 'peripheral T-cell lymphoma, not otherwise specified' and one was classified as 'poorly differentiated neuroend…

Update on extranodal lymphomas. Conclusions of the Workshop held by the EAHP and the SH in Thessaloniki, Greece.

Classification and proper treatment of extranodal lymphoma is hindered by the diversity of lymphoma types and the relative rarity of many of these tumour types. In order to review controversial issues in extranodal lymphoma diagnosis, a joint Workshop of the European Haematopathology Association (EAHP) and the Society for Hematopathology (SH) was held, where 99 selected cases were reviewed and discussed. This Workshop summary is focused on the most controversial aspect of cutaneous B-cell lymphoma, other extranodal B-cell lymphomas, plasmablastic lymphoma and anaplastic large-cell lymphoma in …

CD3+ CD56+ EBER1+ atypical extraosseous plasmacytoma of the nasal cavity.

We present a case of atypical extraosseous plasmacytoma (EP) with a plasmablastic morphology and CD3+ CD56+ Epstein-Barr virus-encoded RNA-1 (EBER1)+ phenotypes of the nasal cavity. A 51-year-old male attended a local hospital with a tumor located in his left nasal cavity that was histologically diagnosed as extranodal NK/T cell lymphoma, nasal type. We reviewed the specimens and re-biopsied the tumor, and confirmed that the tumor was positive for CD3, CD56, and EBER1; however, the tumor showed a plasmablastic morphology without necrosis and angiocentricity, and was positive for CD138, but neg

Head and neck lymphomas: A 20-year review in an Oral Pathology Unit, Johannesburg, South Africa, a country with the highest global incidence of HIV/AIDS.

OBJECTIVES: Non-Hodgkin lymphoma occurs with increasing frequency in HIV/AIDS. As South Africa has the highest incidence of HIV/AIDS worldwi … e most common anatomic site (115 cases) and the maxilla (60 cases) the most common extranodal site. Plasmablastic lymphoma (159 cases) was the most common histologic subtype, seen more frequently as a result of its strong association with HIV/AIDS. The most common Hodgkin's lymphoma was the nodular sclerosing variant (21 cases). Of the head and neck lymphomas in patient …

18 F-FDG PET/CT Findings in a Case of Plasmablastic Myeloma: A Rare Entity.

Plasmablastic myeloma (PBM) is an extremely rare variant of multiple myeloma, having morphologic, clinical, and radiologic overlap with plasmablastic lymphoma (PBL). Thus, distinguishing both becomes vital due to different treatment strategies. Due to limited literature on imaging findings in this rare entity, here we present a unique case of PBM developing in the setting of chronic light chain myeloma, with extensive extramedullary involvement and severe osteopenia, in addition to pleural deposits, pleural effusion, and perinephric fascial deposit. Thus, 18F-FDG PET/CT can be utilized as an i…

Fatal HHV-8-associated hemophagocytic syndrome in an HIV-negative immunocompetent patient with plasmablastic variant of multicentric Castleman disease (plasmablastic microlymphoma).

Virus-associated hemophagocytic syndrome (VAHS) triggered by HHV-8 is extremely rare and has been reported only in 9 immunocompromised patients. We report the first case of HHV-8-associated VAHS in an HIV-negative, immunocompetent patient with plasmablastic variant (plasmablastic microlymphoma) of multicentric Castleman disease (MCD). This 61-year-old man presented with fever, cough, and bilateral inguinal lymphadenopathy. Biopsy of the right inguinal lymph node revealed plasmablastic MCD with nodular aggregates of plasmablasts expressing IgM, MUM1, HHV-8 latency-associated nuclear antigen, an

Fine-needle aspiration cytology of a case of HIV-associated anaplastic myeloma.

Plasma cell neoplasia occurs much less frequently than high-grade B-cell non-Hodgkins lymphoma in HIV-infected patients, but is nevertheless … -common antigen (LCA), but strongly positive for CD38 and kappa light chain. Anaplastic myeloma and plasmablastic lymphoma were considered in the differential diagnosis. Although the cytomorphologic and immunophenotypic findings of our case overlapped with those of plasmablastic lymphoma, the pattern of bone involvement with punched-out lytic lesions and absence of loca …

Expression of immunohistochemical markers in patients with AIDS-related lymphoma.

AIDS-related lymphomas (ARL) present high biological heterogeneity. For better characterization of this type of lymphoma, the objectives of … following: 61% were diffuse large B-cell lymphomas (DLBCLs), 15% were Burkitt's lymphomas, 13% were plasmablastic lymphomas, 10% were high-grade lymphomas and 1% was follicular lymphoma. The positivity for each immunohistochemical marker in DLBCLs, Burkitt's lymphoma and plasmablastic lymphoma was respectively: CD20, 84%, 100%, and 0; CD10, 55%, 100%, and 0; Bcl-6, 45%, …

EPSTEIN -BARR VIRUS ASSOCIATION WITH MALIGNANT LYMPHOMA SUBGROUPS IN ZARIA, NIGERIA.

Epstein-Barr virus (EBV) is said to infect more than 90% of humans worldwide with latent infection for life. A recognized carcinogen, EBV is linked to malignant lymphoma (ML) subtypes of Burkitt's lymphoma (BL), plasmablastic lymphoma, diffuse large cell lymphoma (DLBCL) and Hodgkin's lymphoma (HL). We report the association of EBV with ML in a segment of our patient population. Paraffin blocks from the archives of ABUTH, Zaria were used to construct tissue microarray sections stained using 30 monoclonal antibodies for common Non-Hodgkin's lymphoma/ Hodgkin's lymphoma antigen and chromogenic i…

An Expanded Spectrum of High-Grade B-Cell Non-Hodgkin Lymphomas Involving the Cervicovaginal Region.

The uterine cervix and vaginal regions are infrequently infiltrated by lymphoma. Involvement of these topographic regions may constitute primary disease or more commonly represent a manifestation of systemic lymphomatous disease. Herein, we report an expanded spectrum of high-grade B-cell non-Hodgkin lymphomas comprising plasmablastic lymphoma (with and without plasmacytic differentiation), ALK-positive large B-cell lymphoma, and diffuse large B-cell lymphoma which involved the uterine cervix and/or vagina of 6 patients at initial diagnosis. These tumors clinically mimicked carcinoma and devel…

Plasmablastic transformation of chronic lymphocytic leukemia: a review of literature and report on 2 cases.

Chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL) is the most common leukemia in adults in Western countries. Transformation of CLL/SLL to plasmablastic lymphoma (PBL) is exceedingly rare and often has an extremely poor response to treatment. A thorough molecular workup may help in determining clonality-relatedness and prognosis. We describe two cases of CLL/SLL that transformed into PBL, with an extensive molecular workup in one case, and a review of the literature.