ALK ‐negative anaplastic large cell lymphoma, null type with aberrant expression ofPAX5 andCD138 : A diagnostic pitfall
Autor: | Xinmin Zhang, Muhammad Atif Salyana, Shahbaz Khan |
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Rok vydání: | 2021 |
Předmět: |
Male
Pathology medicine.medical_specialty Histology Palliative care CD30 Ki-1 Antigen Pathology and Forensic Medicine immune system diseases hemic and lymphatic diseases Biopsy Humans Medicine Anaplastic Lymphoma Kinase Lymph node Anaplastic large-cell lymphoma Aged medicine.diagnostic_test business.industry PAX5 Transcription Factor General Medicine Gene rearrangement medicine.disease Peripheral T-cell lymphoma medicine.anatomical_structure Lymphoma Large-Cell Anaplastic Syndecan-1 business Generalized lymphadenopathy |
Zdroj: | Diagnostic Cytopathology. 49 |
ISSN: | 1097-0339 8755-1039 |
Popis: | A 72-year-old man was found to have generalized lymphadenopathy, splenomegaly, and elevated serum lactate dehydrogenase. Fine-needle aspiration and core needle biopsy of a cervical lymph node revealed a large lymphoid cell proliferation with features suggestive of anaplastic large cell lymphoma (ALCL). However, immunophenotypically, the neoplastic cells expressed PAX5 and CD138 in addition to CD30, CD45, MUM-1 and were negative for T-cell markers, B-cell markers, CD15, ALK-1, HHV-8, EBER, kappa, lambda, and pancytokeratin. The ambiguous phenotype triggered further workup. Subsequent molecular studies demonstrated T-cell receptor gene rearrangement and lack of immunoglobulin gene rearrangement. Based on these findings, a diagnosis of ALK-negative ALCL, null type with aberrant expression of PAX5 and CD138, was rendered. The patient received palliative care due to his poor condition and died of the disease. This case presents a diagnostic pitfall and highlights the importance of cytological evaluation and complete workup in the diagnosis of unconventional lymphomas. |
Databáze: | OpenAIRE |
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