No abstract available.
Lymphoma, Large-Cell, Anaplastic

No abstract available.
Lymphoma, Large-Cell, Anaplastic

No abstract available.
Lymphoma, Large-Cell, Anaplastic*

Introduction: Anaplastic lymphoma kinase-positive (ALK+) anaplastic large cell lymphoma (ALCL) with a non-common pattern can be diagnostic challenging. Pathologists can be unavoidably and unintentionally blind to non-descript tumor cells in a lymphohistiocytic- (LH) or small-cell (SC)pattern. We report a case of primary systemic ALK+ ALCL with a SC pattern that presented as secondary gastric lesions with a mixed LH and SC pattern that was masqueraded as inflammatory lesions. Case Report: A 34-year-old woman with intractable epigastric pain was referred to have repeated endoscopy with biopsy. She was found to multiple gastric erosions and nodules that were diagnosed as inflammatory lesions both endoscopically and histologically. Meanwhile, she developed an acute onset of severe back pain associated with a pathologic compression fracture in the T3 thoracic vertebral body. Imaging studies disclosed a disseminated systemic disease involving abdominopelvic lymph nodes and cervical and thoracic vertebral bodies. The needle biopsy of the pelvic lymph node disclosed diffuse proliferation of monomorphic small round cells that were diffusely positive for CD30 and ALK. A diagnosis of ALK+ ALCL with a monomorphic SC pattern was rendered. Discussion: A retrospective review of the gastric biopsies with the aid of immunohistochemistry enabled us to recognise the presence of lymphomatous infiltrates with a mixed LH and SC pattern in every piece of gastric biopsies that were repeatedly misdiagnosed as inflammatory lesions. This case illustrates a significant diagnostic pitfall of the LH- and SC-patterns in ALK+ ALCL, in which the tumour cells featuring lymphoid, plasmacytoid or histiocytoid appearance can be masqueraded as inflammatory cells.
Anaplastic large cell lymphoma

No abstract available.
Lymphoma ; Lymphoma, Large-Cell, Anaplastic

Introduction: Primary cutaneous anaplastic large cell lymphoma (PCALCL) is an uncommonly encountered subtype of cutaneous lymphoma under the classification of CD30-positive lymphoproliferative disorders which presents histologically as large atypical lymphocytes with pleomorphic and anaplastic cytology that localizes to the dermis. Although recurrent, PCALCL usually carries a good prognosis, with 5-year survival rates ranging from 85% to 95%. Case Summary: We report a 73-year-old elderly male who consulted at our out-patient department with a 3-year and 6-month history of multifocal, gradually enlarging, erythematous nodules with dry, necrotic areas on the scalp, right auricular area, left axillary area, right forearm, and right thigh, accompanied by loss of appetite and nontender cervical, left axillary, and right inguinal lymphadenopathy. Previous skin punch biopsy and immunohistochemical stain done by the patient’s preceding dermatologist was signed out as “suggestive” of pseudolymphoma. However, management with intralesional corticosteroid injections provided no improvement. Skin punch biopsy done at our institution revealed ALK negative (-) anaplastic large cell lymphoma. Patient was then referred to an oncologist, however, the patient was lost to follow-up and succumbed to community acquired pneumonia. Conclusion This case highlights the importance of a thorough diagnostic assessment as recent studies indicate a poorer prognosis of ALK (-) cases, with overall 5-year survival rates consistently below 50%.
Lymphoma ; Lymphoma, Large-Cell, Anaplastic

No abstract available.
Leukocytosis* ; Lymphoma, Large-Cell, Anaplastic*

Introduction: Lymphoma is a diverse group of malignant proliferations that arise as discrete tissue masses. The 5th edition of the World Health Organization classification of Tumours of Haematopoietic and Lymphoid Tissues was released on 22nd June 2022. The WHO-HAEM5 classification of Mature T and NK neoplasms is further subclassified into various categories which are detailed in this review. Methods: A search was conducted using bibliographic databases, various repositories, and the Clinical Research Centre website retrieving journal articles, conference proceedings, book Chapters, guidelines, and thesis. The search terms used were Malaysia AND lymphoma. Results: The search earmarked a total of 561 papers. There were nine case series retrieved from 1967 to 2022. The site, age distribution, prognostic markers, and the various subclassification of NK/T cell lymphomas were studied. The gastrointestinal tract was the commonest site for extranodal lymphomas. Prognostic markers associated were EBV, C-MYC protein and staining for CD2, CD3, CD20, CD56, and CD57 antigens. For anaplastic large cell lymphoma (ALCL), CD30 (Ki-1) and ALK antigens were noted as important. The use of 18F-Fluorodeoxyglucose (FDG) positron emission tomography-computed tomography (PETCT) has emerged as an important investigation. Various chemotherapeutic regimens, surgical interventions where necessary and autologous peripheral blood stem cell transplantation when indicated are the mainstay of treatment. Conclusion Research on NK/T cell lymphoma, including ALCL, has been ongoing in recent years. This review adds on to the existing literature on lymphoma in Malaysia that can lead to further research, into the diagnosis and treatment of lymphoma in Malaysia and around the world.
Lymphoma ; Lymphoma, Large-Cell, Anaplastic ; Malaysia

No abstract available.
Histiocytoma, Benign Fibrous* ; Humans ; Lymphoma, Large-Cell, Anaplastic ; Lymphoma, Primary Cutaneous Anaplastic Large Cell*

Anaplastic large-cell lymphoma (ALCL) is a CD30-positive T-cell/null-cell lymphoma that is clinically classified into either primary cutaneous ALCL or systemic ALCL (S-ALCL) sub-types. Because 90% of childhood S-ALCL cases are anaplastic lymphoma kinase (ALK)-positive, there is a lack of data on ALK-negative S-ALCL cases among pediatric patients. Herein, we report a rare case of ALK-negative S-ALCL in a 9-year-old Korean boy who initially presented with itchy erythematous maculopapules and an erosive nodule on the trunk area. We emphasize the need of high index of suspicion of an underlying malignant disease in the presence of refractory eczematous lesions.
Child* ; Eczema ; Humans ; Lymphoma* ; Lymphoma, Large-Cell, Anaplastic* ; Male* ; Phosphotransferases