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Related Experiment Videos

Systemic and primary cutaneous anaplastic large cell lymphomas.

Marshall E Kadin1, Christopher Carpenter

  • 1Department of Pathology, Beth Israel Deaconess Medical Center, Boston, MA, USA.

Seminars in Hematology
|July 24, 2003
PubMed
Summary

Anaplastic large cell lymphoma (ALCL) involves activated lymphocytes and is linked to ALK gene alterations. Primary cutaneous ALCL and lymphomatoid papulosis have distinct paths and prognoses.

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Area of Science:

  • Hematology
  • Oncology
  • Pathology

Background:

  • Anaplastic large cell lymphoma (ALCL) is a T-cell neoplasm characterized by specific histopathological features.
  • Systemic ALCL often presents in advanced stages with extranodal involvement.
  • Primary cutaneous ALCL and lymphomatoid papulosis (LyP) represent distinct clinical and pathogenetic entities.

Purpose of the Study:

  • To describe the histopathology, clinical presentation, and pathogenesis of ALCL.
  • To differentiate systemic ALCL from primary cutaneous ALCL and LyP.
  • To outline treatment and prognosis for these conditions.

Main Methods:

  • Histopathological analysis of lymph node biopsies.
  • Clinical staging and assessment of extranodal disease.

Related Experiment Videos

  • Review of molecular pathogenesis, including ALK gene alterations and downstream signaling pathways.

    • Main Results:

    • Systemic ALCL pathogenesis involves ALK phosphorylation, often due to translocations with NPM.
    • Primary cutaneous ALCL has a different pathogenesis and better prognosis, often presenting as localized skin tumors.
    • LyP, a benign variant, presents as self-regressing skin lesions and carries a predisposition to other lymphomas.

    Conclusions:

    • ALCL encompasses diverse entities with distinct molecular drivers and clinical outcomes.
    • Understanding the pathogenesis of ALK alterations is crucial for systemic ALCL.
    • Primary cutaneous ALCL and LyP require tailored management strategies, with LyP patients needing monitoring for secondary malignancies.